Custom Wiring Harness Installation – Part One

We sent our custom made wiring harness to Rhode Island Wiring Services to have the harness covered with a cloth braid using a royal blue double tracer. The cost was $5.25 per foot with an $8.00 machine set-up fee. We were very pleased with the results. Pardon the messy work bench – it gets that way from time to time!

Cloth Braided Wiring Harness

Previous posts cover the creation and circuit testing of the harness:

A new electrical systemhttps://valvechatter.com/?p=13986

Building and Testing the New Wiring Harness – https://valvechatter.com/?p=14061

JWR Bugeye Wiring Diagrams: https://valvechatter.com/?p=14067

Finally, the time has arrived to install the harness in the car. The first step was to get the end of the harness though the firewall grommet. Not easy with the Deutsch connectors attached, but we got them through.

Harness through the firewall grommet

The next step was to connect the three wires in the harness to the small power supply fuse box. One thirty amp wire feeds the Ignition bank in the fuse box, the other thirty amp wire feeds the accessory bank in the fuse box and the fifteen amp wire feeds the lights bank in the fuse box.

Power supply fuse box

Then it was a matter of connecting the wires to the four banks of fused terminal positions in the Classic Technologies relay/fuse box.

Fuse Box Wiring

We pulled all of the fuses in the two fuse boxes and will add them back one at a time as we test the circuits upon final installation.

fuse installation with ratings

Next, we turned to the group of wires that run to the front of the car along the RH valance. Wiring for the coil, the hydraulic brake switch, the radiator fan, the radiator fan thermostat, the horns and the lights are in this bundle.

Wiring harness on RH Valance

We used stainless steel clips to secure the wires to the valance. A smaller 3/8″ clip will be used to route the capillary tube for the water temperature gauge and sensor.

Stainless steel wiring clips

We made a little bracket to support an 8-pin Deutsch connector at the front of the valance. This connector will mate with an 8-pin bonnet connector to deliver power to the headlights, flashers, running lights and auxiliary driving lights if we decide to mount them.

8 pin Deutsch Connector

We then installed the twin Hella horns and made the wiring connections. This did involve using a four way bullet connector to receive and supply power to both horns. A double spade connector was used to facilitate the wiring connections for the ground wires.

Horns Wiring

Hella horns installed with wiring and custom cover

The next wiring connections to be made were for the wiper motor. Duestch connector “H” is used to connect the wires from the wiper motor to the Wiper Controller mounted behind the dash. The three wires, encased in shrink tubing, come through the firewall. The green wire connects to wiper motor terminal #2 and the green/black wire connects to terminal #1. A black ground wire connects to terminal #3.

Wiper Motor Wiring Connections

The next item to wire was the ignition coil. The yellow/green wire from the harness connects to the (-) terminal of the coil. The white wire from the harness connects to the (+) terminal of the coil.

Ignition Coil Wiring

The heater blower has two black wires from the fan motor. One of those wires is connected to a yellow wire from the harness with a spade connector. The other black wire is ground and is screwed to the chassis.

Heater blower wiring

The hydraulic brake switch is mounted on the RH engine bay valance. A teal green wire and a brown/green wire from the harness connect to the two screw terminals on the switch.

Hydraulic brake switch wiring

The brake pedal brake switch is a custom addition to the Bugeye. Details on the switch and its mounting bracket are highlighted in another post: https://valvechatter.com/?p=14351

Two wires from the harness, a green wire and a dark green/orange wire, come through the grommet in the LH footbox near the dipper switch and connect to the switch at the pedal.

Brake Pedal brake switch wiring

The Dipper switch wiring was completed next. We had a little issue on this because we cut two of the wires a little too short requiring the use of bullet connectors to add length to the wiring to the switch. However, while space was tight, we were able to make all of the necessary connections.

There are three terminals on the dipper switch. A power-in terminal, a low-beam terminal, and a high-beam terminal. One has to look closely to find it but the power-in terminal is marked with an arrow on the switch molding. The blue wire from the harness connects to this terminal via a bullet connector.

The blue/red wire is connected via a bullet connector to a blue/green wire (ran out of blue/red) and then to one of the remaining switch terminals – it doesn’t matter which one.

Three wires connect to the remaining terminal on the switch. The blue/white wire is for high beam operation, the green wire is for the high beam warning light in the speedometer, and the blue/yellow wire is routed to the toggle switch under the dash for the driving lights. These three wires connect together via a four way bullet connector, with one blue/yellow wire then connecting to the terminal on the switch. A bit confusing, but the photo helps.

Dipper switch wiring

The fuel pump wiring connections were then made. The teal/purple wire from the harness was connected to the black wire at the Facet pump with a spade connector, and the white/purple wire from the harness was connected to the SU pump with a spade connector 

Dual fuel pumps wiring connections

Bugeye Restoration Video Episode Eighty shows the installation of the front and rear harnesses: https://vimeo.com/998221034/30174c4eea?share=copy

The contents of this episode include the following:

0:00 – Braided wiring harness received

0:30 – Begin wiring harness installation

0:58 – Power distribution fuse box

1:48 – Fuse ratings

1:58 – Wiring to Classic Technologies fuse box

2:33 – Wiring clips on the RH engine bay valance

2:40 – Deutsch connector for wiring the bonnet

3:30 – Wiring connections to the horns

5:08 – Horns wiring cover

5:30 – Hydraulic brake switch wiring connected

5:45 – Ignition coil wiring connections

6:05 – Heater blower wiring connections

6:26 – Alternator wires to be connected later

6:32 – Connector “F” wiring to the RH courtesy lights and brake lights

7:30 – Brake pedal brake switch wiring connections

7:55 – Dipper Switch wiring bracket

8:54 – Brake pedal switch wiring tested

9:02 – Accelerator pedal assembly temporary installation

9:20 – Wiper controller installation

9:30 – RH demister elbow and tubing installation

10:30 – Wiring harness to the rear of the car installed

11:18 – Fuel pumps wiring connections

 

 

 

 

 

 

Chapter 35 Restoration Assembly, Week Two 12/24/2006

Because of family schedules we celebrated Christmas (gift giving) on Christmas Eve this year, so Monday, Christmas afternoon was devoted to garage work on the Healey. I continued with the installation of the Dynamat Extreme and finished the right side pedal assembly box. I will wait until a little later to finish the dynamat in the interior. The blanking plates were next: one plate with screw clip nuts for the right side master cylinders, 2 plates to cover the steering shaft holes for RHD (one in engine compartment and one in the interior), and finally two plates with the hole for the steering shaft grommet on the left side of the car for LHD cars (again one in the engine compartment and one in the interior). I painted all the flat washers and screw heads for the plate installations.

Blanking Plate 1

I then fastened each of the hot air outlet interior door assemblies and thebulkhead flange bezel. Followed by the fuse block, the double clip for the clutch and brake lines from the masters to the fluid reservoir, the flasher canister and the new flasher relay.

Bulkhead Flange Bezel

 

Vent Doors

Fuse Block and Oil Gauge Line

Well, it is a new day and I am ready for some new challenges. I will get started on the battery cable from British Car Specialists and the wiring harness from British Wiring, Inc. I pushed the harness through the firewall grommet from the interior and separated the strands. I decided to focus on the under car runs first, so after jacking up the car on stands I installed the harness wire that goes to the boot for the fuel pump, fuel sender and rear lights. I skipped the clip attachment to the bump box until I have the rear axle in place.

Wiring Harness 4

Wiring Harness 5

Next I shifted my attention to the battery cable. I got it in place and quit for the day. Tomorrow will be dedicated to connecting the harness under the bonnet and in the boot.

Battery Cable 1

Battery Cable to Starter Solenoid

Harness left side

Wednesday was a good day. I started with the harness on the left side of the car. I secured the harness in the engine compartment with the appropriate zinc fastening clips and connected the wires to the fuse block, the flasher canister, connected and then threaded the dip switch mini-harness through the firewall, connected and threaded the mini-harness for the wiper motor through the firewall, connected the eight wires to the flasher relay box, and connected the front lamp pigtails and routed the harness through the front of the car.

Fuse Block & flasher

Flasher relay

Then I shifted to the right side of the wiring harness. I modified the voltage regulator box to accommodate wiring for an alternator. This is done by cutting out the connectors in the back of the box and then connecting the three brown wires to the same post, and the two yellow wires together to another post.

Harness front view

I then connected the harness to the starter solenoid, and routed the wire down the right side support. Feeders to the ignition, alternator, brake switch, and heater blower route off of the primary harness.

Voltage Box

Harness Right Side

Solenoid Wiring_2

I finished the afternoon installing the battery master switch in the boot. I heard complaints from too many about the original switch so I changed to a modern variant and modified it to fit in the original housing.

Battery Master Switch

Boot Battery Cables

Boot Wiring

I then connected the ground strap, added a few rubber grommets, and routed the wiring to the back of the carwhere a rear lighting harness was connected and fastened with two zinc clips. All-in-all it was a productive day!

Back to the garage the next day, I installed my modified horn brackets and the horns. These are not the proper horns, but at least I got them painted the right color. I used Duplicolor E8800957 “Seattle Silver,” a Honda color, I believe.

horn brackets red LH

horn brackets red RH

Horn painted

They used metric 7mm bolts. Then I installed the little bracket for the bonnet release, the remote control rod support bracket as well as the hydraulic fluid reservoir bracket.

bonnet release rod bracket

fluid reservoir bracket

The bonnet hinges were the next items to install. I greased the clevis pins and used stainless split pins.

Bonnet Hinge

Two big items in my storage bins were the Smiths heater blower and the Cape International interior heater I will be using to upgrade the heating system in the car. The Cape unit, in addition to improved heating efficiency also has a two speed fan. More details are available in the Heating/Cooling section of the website. I went ahead and installed these two items just to make a dent in my storage container!

heater blower 1

Cape heater 2

One thing I wanted to get done early in assembly before tiny spaces got crowded was the installation of the wiper motor assembly rubber grommets. These are a pain to get in, but a little liquid dish soap and muscle did the trick.

Wiper Motor grommets

Chapter 14 – Cleaning and Trial Fitting

August 26, 2003

Wiring 

Wiring Harness – Received the new wiring harness from British Wiring Inc. We ordered the main harness, horn wiring that we probably won’t need, light pigtails and the stator tube wiring. Everything looked good. Also ordered a special pliers for pushing the wiring bullet connectors into the rubber joints which will prove to be a real time saver.

After taking the harness through the firewall, the major components were separated to go down the two sides of the car. 

Flasher – First connected the three wires to the flasher – green, light green, and green/brown. 

Wiper Harness – Then connected the wiper harness with connectors and fed it through the firewall – black, black/green, and green. 

Dimmer Switch – The wires for the dimmer switch were then connected and fed through the top of the footbox and connected to the switch – blue/red, light blue, and blue/white.

Fuse Panel – Wiring was then connected from the harness to the fuse box. Three white wires to the lower left terminal; one heavy brown wire to the top left terminal; two brown/green wires to the upper right terminal; and five green wires to the lower right terminals.

Throttle Switch – The white and white/purple wires intended for the throttle switch will not be used so rubber connectors were placed on the ends to avoid contact with metal. The wires were tucked below the fuse box.

Boot Harness Extension – Six wires were then connected from the firewall harness to the harness that goes to the fuel pump and boot for the lights. The harness runs down the footbox insulation panel with two clips. The harness was clipped to the master cylinder box and then taken through the welded clip on the wheel well. 

Flasher Relay Box – Wires on the left side will then be connected to the flasher relay box including a black ground wire at the base of the box. 

Lights and Horns – The wires were routed to the front of the superstructure for the lights and the horns.

Voltage Regulator Box and Brake Light Switch – The harness was also routed down the right side, by the voltage box and down the right side to the brake light switch.

Wiring 3

Wiring 1

Wiring Fuse Block 2

Wiring 6

Wiring 8

Wiring 9

Wiring 12

September 9, 2003

Heater Vent Doors – Installed the left and right heater outlet vent door assemblies.

Air Vents 1

Air Vents 2

Bump Boxes – Installed painted bump boxes. Secured threaded horn mounting plates.

Bump Box Painted 1

Steering column bracket tapped plate

Parcel Tray and Fascia Brackets – Installed parcel tray support bracket and fascia support brace.

Parcel Tray Brace

Fascia Brace

Steering Column Steady Bracket – Installed steering column steady bracket, but unclear about which windscreen post hole it should mount to – will check it out later.

Steering support Brace

Steering Column Steady Bracket 2

Bonnet Prop Rod  and Brake Reservoir Brackets – Installed bonnet prop rod bracket, pivot, and the brake reservoir mounting bracket.

Brake Reservoir Bracket

Bonnet Rod Bracket

Bonnet safety catch and prop rod bracket

Bonnet Latch Bracket and Release Mechanism – Assembled and installed the bonnet latch/release mechanism.

Bonnet Catch painted 4

Bonnet Catch painted 3

Bonnet Catch painted 2

September 13, 2003

Wiring Continued

Battery Cable – Installed the battery cable ordered from British Car Specialists. The cable set was expensive, but of high quality. Installed rubber grommets in boot kick panel wall. Clip 1 was attached to the right bump box (Should install the cable on the box before it is mounted on the body.) Clip 2 was attached to the kick panel above the shock mounting bracket. The cable was then routed inside of the right frame rail.

Battery Cable 2

Battery Cable 1

Battery Cable 3

Battery Cable 4

Clip 3 and clip 4 were located at the back of the cruciform. Clip 5 was located at the front of the cruciform near the gearbox mounting bracket. Clip 6 was located on the frame rail about 6” from the ground cable mounting. Clip 7 was mounted on the right footbox wall with the cable directed to the right terminal of the starter solenoid. The Cable from the starter to the left terminal on the solenoid was then secured. The white/red stripe wire fastened to the small terminal on the solenoid. Three “cert” nuts need to be installed – two for the solenoid and one for the clip on the footbox.

Battery Cable 5

Battery Cable 6

Battery Cable 8

Battery Cable 9

Next, the rear lights harness was installed. Clip 1 was secured at the right upper fuel pump bracket. Clip 2 was secured on the kick panel to the left of the pump. Clip 3 was attached to the left bump box and the wiring was threaded through the boot wall. The green wire will connect to the fuel gauge sending unit. Metal tabs were fabricated from clips and mounted on the floorboard of the boot.

Single bullet connectors were used to join the main harness to the rear light harness and link the white/black wire, and the white/purple wire. The red wires were connected using a double rubber connector. Clips 3 and 4 were mounted to the rear rail. The long separate white/black wire was also routed through and it connected to the single screw terminal on the battery on/off switch. Black ground wires were connected to the screw on each clip.

Boot Wiring 1

Boot Wiring 2

Boot Wiring 3

Boot Wiring 6

Boot Wiring 4

Boot Wiring 5

 

Chapter 10 – Disassembly

August 17, 2002

Brake and Clutch Master Cylinders –  Loosened lines from cylinders. The brake line from the master cylinder to the 4 way junction has 3 clips and fasteners to the union facing the master cylinder (left side of the car). The clutch line also has three clips: 1 by the solenoid, and 2 on the firewall (high). 

Loosen the 1/2” bolts securing the clutch master cylinder. Pull the cotter pin on the master cylinder shaft to the pedal. Remove the master cylinder. Same procedure for the brake master cylinder. There are aluminum spacers on the top of each master cylinder between the cylinder and the body.

Master Cylinders

Brake Pipe Junction 1

Pedal Box Connections

Pedal Box Bolts

Pedal Box (Pedal Lever Bracket) 

Loosen two 1/2” bolts to remove pedal box mechanism. The box is painted black. Unit will then drop out.

Pedal Box 1

Pedal Box 2

Headlamp Dip Switch Wiring – Pulled the wiring through the pedal box with rubber grommet.

Dipper switch wiring

Dip Switch Wiring

Bulkhead Fresh Air Flange – Removed three phillips head screws securing the fresh air hose flange. Removed flange.

Air Tube Mounting

Brake Lines

The Brake Lines – fittings were loosened at the 4 way brake union to left front wheel – 2 clips at front cross bar to the front bottom union facing front of car at the junction.  Removed right front brake line from junction to right wheel – top union on junction facing front of the car.

LF Brake Lines

Front Center Brake Lines

Brake Junction

Brake Junction connections

Brake Junction Fitting

Brake Junction 3

Brake 4 Way Union & Pressure Switch – Removed the Union by loosening one 7/16” bolt to frame. Two wires must be disconnected. Green goes to terminal closest to the engine. The green with pink stripe wire goes to the terminal closest to the frame. One clip holds wiring harness extension to the brake junction located just above the junction mounting post.

Brake Pressure Switch Wiring

Master Cylinder Sealing Plate (blanking) –  Removed the Plate on the right side of the car. Four Phillips head sheet metal screws. The plate had tar paper on back to seal it. Four clip nuts are used to hold the screws.

Right Sealing Plate

Right Sealing Plate 3

Right Sealing Plate 2

Starter Solenoid. 

Disconnected the wiring for the starter solenoid. The terminal closest to the engine is for the high tension line from the battery. The terminal closest to the body is or the cable to the starter and the brown ignition wire. The white wire with the red stripe goes to the terminal on top.

Starter Solenoid Wiring

Starter Solenoid 2

Starter Solenoid connections 2 & Clutch Pipe Clip

Blanking Bolts – Removed 2 blanking bolts in upper right footwell. Remove two blanking bolts in engine compartment to frame.

Right blanking bolts

Right footwell Blanking Bolts

Steering Wheel Blanking Plate – Removed the blanking plate on right side of car. Located behind the asbestos insulation. Four sheet metal screws.

Slave Cylinder

Loosened one nut where hydraulic hose joins frame.

Slave Cylinder connection to Frame Clip

Slave Cylinder Mounting with Clip and shake proof washer

Fuel Line – Loosened the fuel line from the carb feed line and the fuel pump. Three to four clips run along the frame rail from carbs to fuel pump.

Wiring Harness – Carefully pulled the wiring harness from front firewall to the rear of the car. Approximately 10 screws through clips on frame. Also two screws and clips through asbestos insulation securing the harness.

Right wiring clamp

Voltage Box wiring

Wiring Clamps on Insulation 3

Firewall wiring clamp

Overdrive switch – Wiring connections: Left terminal – white/purple stripe. Middle terminal – 2 white/green stripe wires. Right terminal – 2 solid white wires. Bottom terminal – black wire from harness.

Firewall wiring harness

Overdrive relay

Relay wiring

Throttle Switch – Bottom terminal – white/ purple stripe wire. Top terminal – White/green stripe wire. See above.

Fuse Block – After disconnecting the wiring to the block, two #10 machine screws were loosened to release the block from the firewall. 

Fuse Block wiring

Fuse Block and relay

Voltage Regulator – Five terminals. Far left form driver’s perspective, labeled #1 with far left #5. 1 – black ground from adjacent screw. 2 – 2 solid yellow wires. 3 – 1 yellow/green stripe wire. 4 – 2 solid brown wires. 5 – 1 large brown/blue stripe wire. Note that there are three black ground wires to the adjacent firewall screw.

Voltage Box wiring

Voltage Box

Voltage Box (2)

Number Identification Plates – from the firewall. Both are secured with small chrome sheet metal screws.

ID Plates 3

ID Plate 1

ID Plate 2

Throttle Linkage – Four 7/16” bolts holding shaft under tunnel. Very hard to get to. Disconnect at pedal linkage. Remove accelerator pedal – two large pozi-drive screws. Remove throttle shaft locator collar from engine compartment wall, two screws and nuts.

Throttle Linkage 1

Throttle Linkage 2

Throttle Linkage 3

Throttle Linkage 6

Throttle Linkage 5

Throttle Linkage 4

Throttle Linkage 7

Accelerator collar

Accelerator pedal to firewall

 

 

Chapter 8 – Disassembly

Fresh Air Intake Assembly –  Three screws, two with nuts and one welded onto the tube secure the assembly to the superstructure. Disconnected the air control cable.

Fresh Air Intake Assembly

Fresh Air Intake Assembly

Flasher Relay –  Two cross head screws on top, one on bottom. All have nuts welded on the outside of the wheel well. The bottom screw also holds a wiring harness clamp and the ground wire. Starting from top left and going down – first wire is green with pink stripe, second is green/white stripe, third is white/brown stripe, and fourth is green/yellow stripe. Starting from the right top and going down – first wire is green/brown stripe, second is green/red stripe, third is white/purple stripe and fourth is green/? Stripe. Black ground wire is at bottom.

Flasher Relay Wiring 1

Flasher Relay Wiring 2

Flasher Relay Wiring 3

Bonnet Latch Support Bracket, Lever and Spring –  Note that the left side of center has a rubber tube over the spring and extension rod.

Bonnet Latch Return Spring

Bonnet Latch Rod

Bonnet Latch Support Bracket – The bracket is secured by two bolts and nuts.

Bonnet Latch Support Bracket

Bonnet Latch Return

Wiring harness extension for lights and horns – Two clamps located by screws and nuts at the front of the car.

Wiring Harness Clip Screws

Wiring Harness at Front of Car

August 3, 2002

Rear Axle and Related Assembly

The Bump Stop Boxes –  were removed from both sides of the car. Two large pozi-drive screws with large washers and nuts located by the rear occasional seats hold the boxes. Two bolts and nuts must also be removed in the side of each box that secure clamps for wiring. In our case the bolts were all broken from wear and tear.

Rear Axle Bump Stop on Car

Rear Axle Bump Stop Removed

Mounting Holes

The Fuel Pump   was removed to get it out of the way of the axle. Disconnected 5/8” in and out fuel pipes to the pump. Remove 4 7/16” bolts into fixed nuts on the rear bulkhead wall. Finally, disconnected wire at knurled fixing knob.

Fuel Pump Mounted to Bracket at Rear Kick Panel

Disconnected White Wire to Fuel Pump

Fuel Pump and Bracket Removed

Boot wiring harness extension –  Wiring goes to the fuel sender and lights. We clipped the wire at the bulkhead for easy removal since we knew we would be replacing it. Two clamps with split head screws secure the wiring through the bulkhead wall. Additional connections are then made to route to the tailights.

Fuel Pipe to Pump and Wiring Harness

Wiiring Harness to Boot

Wiring Connector for Lights in Boot

Wiring Clip

Wiring and Handbrake Cable

Wiring Cable Removal

Handbrake cable –  The cable was removed from its axle attachment. To save time we just cut the flexible brake line hose to the junction.

Handbrake Components

Handbrake Components at Rear Axle

Rear Shock Absorbers – First removed nut to axle link. Then removed two nuts and bolts to rear bulkhead for each.

Rear Axle –  Drain differential fluid from the rear end. Place jack under differential to take pressure off springs. Loosen the four nuts on the U bolts under the mounting bracket. The nuts should be loosened gradually to avoid too much pressure on the spring. Disconnect tramp bar at mounting bracket on axle. Rotate axle and lift and slide out to the right.

Rear Axle U Bolts

Rear Axle U Bolt Mounting Plates

Panhard Rod Mounting

Rear Axle Removed

August 4, 2002

Steering Assembly

Steering Column Support Clamp – There are four holes available for the bolt and nut on the steering column bracket. The bolt was found in the 2nd hole from the firewall. Bolt heads were to the right, nut to the left.

Steering Column Mount

Steering Column Bracket Mount

Steering column bracket –  Removed the bracket by loosening four bolts and nuts.

Steering Column Bracket Removed

Steering Column Rubber gasket

Steering Shaft Bracket to Frame Mount from below

Steering Shaft Bracket to Frame Mount from Above

 

Chapter 4 – Disassembly

May 26, 2002

Wiring Harness

The wiring harness enters the interior cabin from a large centrally located grommet in the firewall. It splits into three strands.

Wring Harness at the Firewall Grommet

Strand “A”

Dash panel light switch – 3 wires, 2 red/white stripe to one post. 1 solid red wire to other post.

Dash Panel Light Switch 1

Dash Panel Light Switch 2

Heater – 1 solid green wire with bullet connector joint.  1 green/red stripe wire.

Heater Wiring

Ignition – 2 White wires to left post. 1 Brown wire/blue line to right post.

Ignition Wiring

Strand “B”

Speedometer – 2 black wires soldered to one loop connector to the right post. 

1 Blue/white stripe 

1 Lime green wire 

1 Black wire

Speedometer Wiring

Speedometer Wiring 2

Starter Button – 2 solid white wires soldered together to right post on button.

 1 white/red stripe to left post on button.

Starter Button

Dash Light – 1 red/white stripe wire.

Dash Light

Wiper Switch – 1 black wire/green stripe to left post. 1 solid black wire to right post.

Wiper Switch Wiring

Tachometer – 3 solid black wires soldered into one connector, fasten to left post on tachometer. 1 solid white wire – ? 

Tachometer

Lights – 2 red wires soldered together (1)

  2 large brown wires/blue stripe soldered together. (2)

  1 solid large light blue wire. (3)

Lights

Fuel Gauge – 2 solid green wires soldered together to left post. 1 green/black stripe to right post.

Fuel Gauge

Overdrive switch – 1 solid white wire to right post. 1 white/purple stripe wire to left post.

Overdrive Switch Wiring

Dash Light – 1 red wire/white stripe. 

New Wiring Harness Circuits

Power Inputs to the Classic Technologies’ Relay/Fuse Panel

The Classic Technologies Panel has four primary connections.

Classic Technology's Relay Fuse Panel

Classic Technologies’ Relay Fuse Panel

A – 12V power input from the small fuse box (battery B+) to power the accessories circuits. A brown 12 AWG wire is used to the Yellow screw terminal spade lug connection.

B – 12V power input from the small fuse box (battery B+) to power the high and low beam headlight relays. A brown/blue 14 AWG wire is used to the Blue screw terminal spade lug connection.

C – 12V power input from the small fuse box (battery B+) to power the constant power circuits in the vehicle. A brown 12 AWG wire is used to the Red screw terminal for a spade lug termination.

O – ground or earth to the car’s chassis.

In my case, 12V power is routed from the battery in the trunk to the starter solenoid mounted centrally on the firewall in the engine bay. The negative terminal of the battery is wired to the car’s chassis. A ground strap is used to connect the grounded chassis to the engine/gearbox.

Ground Strap Mounted

Ground Strap Mounted

The battery relocation to the boot was addressed in a previous post.From the solenoid, a brown 8 AWG wire delivers power to a small fuse box with six circuits mounted on the firewall directly below the starter solenoid. I used two nutserts for the mounting to the firewall.  Three of the six fused circuits are then used to provide power to three input terminals on the Classic Technologies’ relay/fuse panel. The additional three are spares for the moment.

OnLine-LED-Store Six-Way Fuse Box

OnLine-LED-Store Six-Way Fuse Box

This is a diagram of the wiring to the Relay/Fuse Panel:

Rose Jaguar MK2 Power to the Classic Technologies Fuse Box

Rose Jaguar MK2 Power to the Classic Technologies Fuse Box

Six Way Firewall Fuse Box Delivering Power to Classic Tech Relay:Fuse Panel

Six Way Firewall Fuse Box Delivering Power to Classic Tech Relay:Fuse Panel

The three wires from the small firewall fuse box, the white/red wire from the solenoid to the fuse panel and the heavy 4 AWG cable from the solenoid to the alternator will be “packaged” together in one TechFlex sleeve/cover.

Before getting into the allocation of the thirty-four fuse positions available to use in the Classic Technologies Relay/Fuse panel, it might be helpful to once again point point out that as indicated in the post on new wiring harness connectors I developed a spreadsheet to be used in conjunction with wiring diagrams. The spreadsheet lists all connection points of the electrical wiring system. Links are provided below:

Again, a disclaimer is appropriate: The spreadsheet is provided as guidance for those who might wish to do something similar, but it should not be duplicated or utilized without careful inspection and  approval by a certified automotive electrician.

This alphabetical listing of components is provided to help quickly identify items in the electrical system. A spreadsheet line number(s) associated with the component is indicated.

Rose Jaguar MK2 Electrical Connections Alpha listing

This is the spreadsheet showing all connections:

Rose Jaguar MK2 Electrical Connections Spreadsheet

The following four diagrams illustrate the wiring sourced from the thirty-four fused positions in the system. Please let me know if as a reader you note an error or an omission. I apologize for the somewhat primitive diagrams as I did not have proper software available to do the job. I resorted to “Keynote” a presentation software to complete the task.

Rose Jaguar MK2 Fuse Positions 1-8

Rose Jaguar MK2 Fuse Positions 1-8

Rose Jaguar MK2 Fuse Positions 9-16

Rose Jaguar MK2 Fuse Positions 9-16

Rose Jaguar MK2 Fuse Positions 17-25

Rose Jaguar MK2 Fuse Positions 17-25

Rose Jaguar MK2 Fuse Positions 26-34

Rose Jaguar MK2 Fuse Positions 26-34

 

Circuit Modifications & Additions

Several of the modifications I am making to my MK2 require either modified or new electrical circuits. I highlight below the details of some of these wiring changes.

Starter Solenoid

I replaced the original starter solenoid with a new one sourced from SNG Barratt. The large post closest to the firewall provides the mounting for the 4 AWG cable to the starter. The large post closest to the engine mounts three cables: the 2AWG cable from the battery, the 4AWG cable to the block connector on the electrical panel on the LH engine bay valance (ultimately to the alternator), and a 8AWG wire to the 6-way firewall fuse panel. On the upper small post on the solenoid a single wire from the starter button is attached.

Alternator

I have considerably more power requirements in my car than could be addressed by the original dynamo/generator.

The specifics of the Hitachi 120 amp alternator I am using may be found under the “electrical components” posting. However, I will detail the wiring to support the alternator here.

I decided to go with 4AWG cable and also decided to install a fuse in the line between the alternator and the wiring system to avoid any possibility of a problem with a power surge created by a bad regulator in the alternator.

I sourced the cable and fuse from CE Auto Electric Supply. The folks at CE Auto Electric Supply are very helpful and they sell high quality products. Both products are typically used in high-end sound system applications. This particular cable has 1,862 strands. The cable was terminated with 3/8″ terminals, properly crimped and covered with adhesive shrink tubing.

Alternator Cable CE Supply 4AWG 1862 Strands

Alternator Cable CE Supply 4AWG 1862 Strands

I installed a JL audio premium series master ANL fuse block with a 125 amp “Stinger” ANL style fuse, part number SPF52125 on the lower right portion of the original fuse panel.

ANL 125 Amp Fuse with J&L Holder

ANL 125 Amp Fuse with J&L Holder

Two three-quarter inch long machine screws were used to secure the fuse block to the panel. On one I was able to take advantage of the 10–32 captured nut that was already on the fuse panel, and on the other I used a nutsert with the 10-24 screw.

One of the nice features of this particular fuse block is that the ProStar hexagonal posts can be rotated so that the cable can approach from almost any angle. As you can see in the photo, I took advantage of this feature. After the engine is installed, the alternator cable will be cut to proper length.

As can be seen in the image, the cable from the ANL fuse connects to a connector block also used for the power steering.

Alternator Fuse Mounted

Alternator Fuse Mounted

The cable is then routed from the connector block along the LH valance and the firewall to the starter solenoid. It is difficult to track because of all of the in-process wiring, but the path of the alternator cable is visible in the image below:

Alternator Cable Wiring

Alternator Cable Wiring

Power Steering Pump

The installation of the power-assisted rack and pinion steering requires the conversion to negative earth and the installation of an alternator replacing the original dynamo/generator. The kit, as supplied, provided a Lucas 80 amp LMA 604 alternator. However, due to other electrical requirements I chose to upgrade to a 120 amp Hitachi alternator. Details about the alternator are found at this link: https://valvechatter.com/?p=4113.

M&C Wilkinson provided wiring instructions, but my configuration is slightly different than in the application they referenced. The wiring diagram below is my interpretation of the wiring required for the pump in my car.

Five wires emanate from the pump. The heavy brown wire connects to ground. The heavy red cable connects to the supplied 80 amp fuse. The 22 gauge black wire connects to the fuse panel at location #19 or #23. The 22 gauge blue/slate wire connects to the alternator at the indicator lamp post.

Rose Jaguar MK2 Wiring Diagram for Electric Power Steering Pump

Rose Jaguar MK2 Wiring Diagram for Electric Power Steering Pump

In this image I have installed the 80 amp fuse for the power steering pump. The Bosch relay will be used for the Fogranger fog lamps. All of this will be out of view once the black sheet metal cover his made for the panel.

Power Steering Pump, Alternator & Fogranger Wiring on Electrical Panel

Power Steering Pump, Alternator & Fogranger Wiring on Electrical Panel

Heater Fan Wiring

A full description of the restoration and modification of the heater box and fan may be found at the Heater Post on this Valvechatter website. The following information addresses the wiring of the heater fan.

The orange wire from the motor is connected to ground. The black wire to the “inside” post (closest to the heater box) of the resistor. The slate wire from terminal #6 on the switch is connected to the “outside” post (closest to the blower fan) of the resistor. The white/green wire from terminal #8 on the switch connects to the “inside” post on the resistor. The green/yellow wire from the #4 terminal of the switch is connected to the fuse position #11 for power. With this wiring in place, the lower position of the switch is “off,” the middle position is “Low Speed” and the upper position is “High Speed.”

I created a pigtail (seen below) from the resistor for the heater fan wiring. Two wires in the pigtail are connected through two-way snap connectors to wires of the same color which route through the firewall and ultimately back to the Fan Switch. The black wire in the pigtail goes directly to the fan motor. The orange wire from the motor is the ground and it is connected to the LH valance grounding terminal strip.

Heater Fan Wiring

Heater Fan Wiring

Heater Fan Wiring

Heater Fan Wiring

Wiper Motor Wiring

As documented in my post entitled Wiper System Upgrade, I installed a Lucas 29W wiper motor kit from Classic Motor Cars in the UK. The upgrade includes a relay mounted behind the central instrument panel assembly. The wiring for the wiper switch is referenced above under the section “Instrument Panel Assembly Switch Wiring.” This is a diagram of the wiring:

Rose Jaguar MK2 Wiper System Wiring

Rose Jaguar MK2 Wiper System Wiring

This is an image of the wiper motor mounting. I used eight of the ten connection points in a ten-way rubber snap connector and fastened it to engine bay RH valance with an original type retaining clasp. note the wiper motor ground connection to the upper left.

Wiper Motor Mount and Wiring

Wiper Motor Mount and Wiring

Cruise Control Wiringcruise-control-installation-disclaimer-001

A full description of the installation of the Rostra Cruise Control System in my MK2 is provided in the MK2 Cruise Control Post. My wiring diagram, tailored for my 1964 Jaguar MK2 application, is provided below. As the disclaimer above indicates, the wiring description in this post journals what I did for my car. It is not my intention to describe what you should do for your car!

This is a link to a pdf of the wiring diagram and it is also shown in the image below:

rostra-cruise-control-wiring-for-jag-mk2

Rostar Cruise Control Wiring for the Rose MK2

Rostar Cruise Control Wiring for the Rose MK2

Central Locking and Keyless Entry Wiring

A full description of the locking system may be found at the “Remote Control Door Locks web site entry: https://valvechatter.com/?p=9205. The wiring for the system is comprised of two components. The MES Central Locking Control Module operates the door lock actuators. Once that system in properly installed and operating as it should, the AVITAL keyless entry module is added to permit use of a key fob to wirelessly lock and unlock all doors. An added feature of the system is that about fifteen seconds after ignition all doors are locked automatically. 

The following wiring diagram is unfortunately a bit busy. This is a link to a pdf file of the diagram: Keyless Entry Power Locks for Rose Jag MK2 and a jpeg file is depicted below:

Keyless Entry Power Locks for Rose Jag MK2

 

Air Conditioner Operating Controls Wiring

A full description of the installation of the RetroAir air conditioning system in my MK2 is provided in the “Air Conditioning” Post. The wiring of the controls and devices for the air conditioning system is depicted in the following diagram:

Rose Jaguar MK2 Air Conditioning Wiring

Rose Jaguar MK2 Air Conditioning Wiring

This is a photograph of the wiring harness provided in the RetroAir kit. In my application I did not use the circuit breaker shown in the image because I wired the blower switch directly to the fuse panel and protected the system at that point with a 40 amp fuse.

RetroAir Wiring Harness Kit

RetroAir Wiring Harness Kit

As the diagram above illustrates, I chose to install a trinary pressure safety switch in the air conditioning electrical circuit. The trinity switch is also discussed in the “Air Conditioning Post.”

Vintage Air Trinary Switch

Vintage Air Trinary Switch

The Vintage Air trinary switch kits combine low and high pressure compressor clutch cut-off functions plus an electric fan engagement signal at 254 psi. The low pressure cut-off of these trinary switches is 30 psi and the high pressure cut-off is 406 psi.

http://www.vintageair.com/Instructions2013/904678.pdf

The switch as supplied has two blue wires and two black wires. Because the switch is located in a right from wheel well and exposed to the elements, I connected the four wires to a waterproof connector purchased from British Wiring, and then routed the wires to their termination points. One blue wire is for ground and the other for fused power. One black wire connects to the compressor and the other to the thermostat controller for the air conditioner.

Turn Indicator and Headlamp Flasher Switch at the Steering Column  and the Laycock De Normanville Overdrive Switch and Wiring

The electric overdrive is activated by a lever switch on the right side of the steering column. Power is derived from fuse position #14 of the CT fuse box. With lever activation a signal is sent to the overdrive interlock, or top gear switch located on the top of the gearbox and then to the overdrive solenoid. A warning indicator bulb is illuminated when the overdrive is engaged. More information about the switch and lever mechanism may be found in the “electrical components” post.

Overdrive Interlock or Top Gear Switch at gearbox

Overdrive Interlock or Top Gear Switch at gearbox

The lever on the left side of the steering column is used in an upward and downward motion to activate the LH and RH turn indicator flashers at the front and rear of the vehicle. When the flashers are functioning an indicator bulb located in a centralized position behind the steering wheel is illuminated in a flashing pattern. The headlamp flasher is activated by the driver pulling the same lever toward himself. This action will trigger the high beam warning light in the speedometer.

Rose Jaguar MK2 Flasher Circuit & Overdrive

Rose Jaguar MK2 Flasher Circuit & Overdrive

Turn Signal Switch Wiring

Turn Signal Switch Wiring

Turn Signal and overdrive indicator bulbs, holders, and pigtail

Turn Signal and overdrive indicator bulbs, holders, and pigtail

Auxiliary Power/USB Ports

I intend to install an arm rest/console between the front seats in my MK2. The console will include an auxiliary power/USB port unit. Power is sourced from the fuse box, position #12.

Auxiliary Power and USB unit

Auxiliary Power and USB unit

Auxiliary Power and USB unit

Auxiliary Power and USB unit

Powered Front Seats

The front seats I am using are from a Jaguar XJ40. More information about the seats is available at the “Seating” post. They have more features than I plan to use.

1990 Daimler Front Seats

1990 Daimler Front Seats

Although the wiring harnesses were complete, there were a number of electrical connectors on the harnesses with no explanation as to what needed to be connected where to get the seats functioning.

Seat Wiring Harness and Switches

Seat Wiring Harness and Switches

The seats have seat heaters (upper and lower cushions), a memory feature for the driver’s seat, seat belt alarms, and wiring to permit automatic movement of the driver’s seat to the aft position when the driver’s door is opened.

After some enquiries on the Forums, Bryan Neish came to my aid. He was of great help figuring out what the wiring at each of the connectors did. I know he spent quite a lot of time reviewing wiring diagrams to find what I needed. George Leicht was also helpful. He sent along the wiring diagram that accurately reflected my seat wiring.

I wired the seats to unswitched power at the fuse box to facilitate seat operation before entry or before starting the ignition. I was able to use the original seat wiring harness and bank of switches to control the four motors adjusting the lower and upper seat cushions for each chair. The wiring runs under the center console to each seat. A pdf file of the seat wiring schematic for 1990 may be found here: 1990 Jaguar XJ40 Seat Electrical Schematic

I have yet to decide where I will mount the switches. The image below shows the approximate location of the switches as Ton Tulleken installed them on his car:

Possible Placement of Seat Switches

Possible Placement of Seat Switches

Kevin Moore's MK2 power seat switches

Kevin Moore’s MK2 power seat switches

The image above shows the location of the switches in Kevin Moore’s car.

Lighting

SideLights

Additional detail about the sidelamps may be seen in the exterior lighting post. I rewired the original side lamp fixtures and trial fitted them to the body. The rubber “O” rings supplied by SNG Barratt are to thick to fit properly so I replaced them with metric 24mm – 2mm “O”rings ordered from McMaster Carr. New LED bulbs were also fitted in the fixtures. The red 18 AWG wire from the bulb is combined with a black 14 AWG ground wire from the fixture in a vinyl sleeve that goes through the LH and RH valance lighting grommet.

SideLamps

SideLamps

RH Side Lamp Wiring & Sleeving

RH Side Lamp Wiring & Sleeving

Refurbished side lights installed

Refurbished side lights installed

Turn Signal Flasher Lamps

After installing the side lamps I moved to the turn signal flashers. Information about the lamps is contained in the exterior lights post. I re-used the original fixture wire terminals but replaced the power and ground wiring with new. The power wire is blue/green 18 AWG and the ground wire is black 14AWG. The wiring is pushed through holes on the back end of the fixture’s new rubber boot. New vinyl sleeving was also used for the flasher lamps.

Front Flasher Turn signal

Front Flasher Turn signal

Turn Signal Flasher with LED Installed

Turn Signal Flasher with LED Installed

Turn Signal Flasher Wiring

Turn Signal Flasher Wiring

Fograngers

More information about the fog rangers may be found in the exterior lights post. The Classic Technologies Fuse box did not have a relay designed into the product for fog or driving lights, so I added a Bosch relay for this function. It is mounted on the original fuse panel in the engine bay on the LH valance. The foglights are controlled by the primary light switch.

Rose Jaguar MK2 Fogranger Wiring

Rose Jaguar MK2 Fogranger Wiring

Fogranger Relay

Fogranger Relay

RH Fogranger Installed

RH Fogranger Installed

Headlights

More information about the headlights may be found in the exterior lights post. I installed new 3 wire (high beam, low beam, and ground) plugs, wiring and sleeving for the headlights.

Headlight Installed with Newly Chromed Trim Ring

Headlight Installed with Newly Chromed Trim Ring

Although not too pretty yet, this image shows the temporary installation of all of the front exterior lights. The blue painter’s tape is to protect the chrome. The installation was done to make sure that I had all the parts needed for a particular light and to test the electric circuitry and switches.

Temporary Installation of front Exterior Lights

Temporary Installation of front Exterior Lights

These images show the exterior lights wiring in new sleeving as it is routed from the individual fixture through the large wiring grommet located on each valance.

LH Front Exterior Lights Wire Sleeving and Routing

LH Front Exterior Lights Wire Sleeving and Routing

RH Front Exterior Lights Wire Sleeving and Routing

Tail Lights

More information about the tail lights may be found in the exterior lights post. I substituted LED bulbs for the original incandescent type; however, the wiring remains the same. In fact, I was able to reuse the original wire leads from each of the bulb holders. The upper bulb is for the flasher with a single wire lead. The lower bulb is for the regular lights plus an additional light for the brakes with a double wire lead.

Tail Light Wire Leads

Tail Light Wire Leads

Tail Light LED Bulbs

Tail Light LED Bulbs

Number plate illumination and reverse lamp

More information about the lamp may be found in the exterior lights post. The lamp includes one light for the luggage compartment, two bulbs for the license plate illumination, and one bulb for reversing. All original incandescent bulbs were replaced with LEDs. The original wiring harness for the lamp was in pretty good shape, but I constructed a new one with all fresh wiring.

Boot Lamp with new wiring harness

Boot Lamp with new wiring harness

Luggage compartment lamp

As my friend Eric Kriss points out in his MK2 restoration blog, the luggage lamp seemed to be an afterthought to Jaguar engineers. To function the light switch on the gauge panel had to be turned on, but it is often the case that one would want to access the luggage area after the car’s ignition, much less its lights were turned off! Instead of wiring the luggage compartment lamp in series with the front marker and rear tail lights, Eric revised the wiring to move the luggage compartment lamp to its own circuit. To make the lamp illuminate when the boot lid is opened a position sensitive mercury tilt switch is used. As Eric describes, when upright a ground connection is established permitting current to flow to the bulb. When the boot lid is shut, the ground connection is broken so the light goes off.Mercury Tilt Switch

 

Interior Lights

The MK2 as original had six interior lamps: the map light at the central gauge panel, a lamp at the top of each center or “B/C” pillar, a lamp in the cubby box and a lamp on each side of the rear of the car above the passenger seat. These latter lamps referred to as rear quarter interior lamps. My Mk2 will also have two courtesy lamps in the back of the front seat headrests. More information concerning these lamps may be found at the “Interior Lights” post.

As pointed out in the “Interior Lights” post, the replacement center pillar lamps are not exact replacements for the originals. They are operationally superior in that they provide an “on-off” switch at the lamp, and also because they screw, rather than snap, together. They just don’t look quite as nice being plastic rather than chrome metal. Just to check fit and to test the electrical system I did install the new center pillar lamps mounted on their wood bases. An additional grounding wire is used with the new lamp for its switch so there are three wires rather than the original two. For purposes of testing the electric system I temporarily fixed the third ground wire to the pillar as shown in the third photo below.

36 mm festoon bulbs in warm white were substituted for the original incandescent bulbs.The lamps are wired to the interior lighting circuit that includes the interior lamps toggle switch on the central gauge panel as well as the four door switches. The black ground wire is simply attached to the metal center pillar.

New three-wire center pillar lamp with switch

New three-wire center pillar lamp with switch

New center pillar lamp loosely mounted on wood base

New center pillar lamp loosely mounted on wood base

Temporary ground connection for center pillar lamp switch

Temporary ground connection for center pillar lamp switch

I trial fit the new, but as original, rear quarter lamps which required making new plywood mounting frames. Wiring for the rear quarter interior lamps initiates at fuse box to the interior lamp switch on the gauge panel and then proceeds through the LH and RH sills to the lamps. There is also a switch in each door that activates the interior lamps should any of the four doors be opened. I did not use wiring pigtails for these lamps. 36 mm festoon bulbs in warm white were substituted for the original incandescent bulbs.

Rear Quarter Interior Lamp

Rear Quarter Interior Lamp

LH rear quarter interior lamp

LH rear quarter interior lamp

I am using XJ40 powered seats in my MK2. The seat headrest lights were originally wired in such a way that they too illuminated when the car’s doors were opened. These lights also have an integral on/off rotary or dial switch. Without the central processor of a more modern car it would be all too easy to leave these lights on and eventually drain the battery. Therefore, I elected to wire these lamps to a switched power source rather than a constant power source like the other lamps. I did not use the terminal on the headrest light that would normally have a red/green wire to the door switches.

XJ40 Hedrest Lamp Installation

XJ40 Hedrest Lamp Installation

XJ40 Headrest Lamp Wiring

I was able to use the original door switches in my rebuild. I just rewired each of them with new wire.

Front Door Interior Light Switch and Wiring

Front Door Interior Light Switch and Wiring

The front door switch is mounted in the lower door hinge and travels through the kick panel to the switch.

Front Door Interior Light Switch in Lower Door hinge

Front Door Interior Light Switch in Lower Door hinge

Front Door Interior Light Switch Wiring through Lower Kick Panel

Front Door Interior Light Switch Wiring through Lower Kick Panel

The rear door switch is mounted in the rear side of the B/C post or center pillar. The wiring for the switch travels from under the front dash, through the sill and up the center pillar.

Rear Door Interior Light Switch in Center Pillar

Rear Door Interior Light Switch in Center Pillar

The Cubby Box lamp assembly wiring for Lamp/Switch consists of a metal base fixture, bulb, blue plastic cover and a switch controlled by opening the Cubby Box door. More images and information regarding the lamp may be found at the “Interior Lights” post. As with the other interior lamps, the original incandescent bulb was replaced with a 36 mm festoon bulb in warm white. Terminals on the back side of the metal lamp base connect to the fused power source and to the Cubby Box door switch. The image below illustrates the wiring sources and terminations for the Cubby Box.

Cubby Box Wiring for Lamp:Switch

Cubby Box Wiring for Lamp/Switch

Some Details on a Few Other Assemblies

The LH and RH Fascia Board Assemblies were installed in the car so as to test the wiring for the speedometer and its warning lights, the tachometer with the internal clock, the “Handbrake “ON” position and brake fluid container level” warning lamp, and the “Cubby” glove box lamp. More information on these fascia boards may be found at the “Dash” post. All gauge/instrument illumination incandescent bulbs were replaced with LEDs.

I first connected the left turn signal flashing indicator, the right turn signal flashing indicator, and the overdrive engagement indicator from the indicators wiring pigtail to the direction indicator/headlamp flasher switch. A ground wire for the indicators was mounted to the body below the dash.

Ground connection under dash for indicator lights

Ground connection under dash for indicator lights

Loose fitting of fascia board for tach install

Loose fitting of fascia board for tach install

I found it easiest to loosely position the driver’s side fascia board and I then installed the tachometer with its two mounting clamps, a ground wire, the 12 volt power wire, the wire connecting the tach to the coil and the two instrument lights. Leaving the speedometer position open facilitates accessing the LH fascia board outside mounting studs/nuts.

LH fascia board temporary install with tach in place

LH fascia board temporary install with tach in place

I then secured the LH fascia board to its mounts, followed by connecting the wiring for the handbrake/brake fluid level warning lamp.

I then connected the two speedometer illumination lights, the lights for the headlamp, ignition, and fuel warning lights, and the speedometer drive cable.

Installing the passenger side (RH) fascia board is much the same as the driver’s (LH) side. A sliding panel in the cubby box may be removed to provide access to the studs/nuts of the outside mounting bracket. The wiring for the “Cubby” lamp as shown in the write-up and image above is connected to ground and power.

Fuel Sender

The fuel sender has its own short wiring harness consisting of three wires in a protective sleeving. One wire for ground, one for the fuel gauge (the “T” terminal on the sender for 10 volts) and one for the fuel level warning lamp in the speedometer (the “W” terminal on the sender). The embossed terminal markings are evident on the image below. My sender has an “E” marking for earth, although my grounding wire was fixed to one of the screws used to mount the sender to the tank. While the original harness was in good shape, I made a new one for installation in the Jag when the fuel tank is fitted.

Original Fuel Sender Wiring Harness

Original Fuel Sender Wiring Harness

New Fuel Sender Wiring Harness

New Fuel Sender Wiring Harness

Fuel Sender Terminals

Fuel Sender Terminals

Warning Light for Handbrake and Fluid Level

Handbrake and Fluid Warning lamp Escutcheon

Handbrake and Fluid Warning lamp Escutcheon

The lamp is activated by a switch at the base of the handbrake, mounted to a bracket located on the interior floor. See: https://valvechatter.com/?p=3913 under the handbrake post, or by a level indicator switch in the brake fluid reservoir is shown earlier in this post.

Handbrake Warning Switch

Handbrake Warning Switch

The “Warning Lamp Indicating Handbrake ‘ON’ Position and Level in Brake Fluid Container” is comprised of the cover and window assembly, a spring washer on the central terminal post, with nuts and washers. Rubber sleeves are slipped over the white wire at the terminal and the white and red/green wires are contained together in a rubber sleeve of about 4.” The warning light was cleaned and reassembled and a new face plate was installed.

Warning Lamp

Warning Lamp

Hydraulic Fluid Reservoir, Low Fluid Warning Switch

The fluid canister contains a float activated level indicator switch in its screw cap.

Hydraulic Fluid Container Location

Hydraulic Fluid Container Location

Two wires attach the switch with spade connectors and are protected by a rubber cap over the indicator plunger. I sourced a new canister and indicator switch (cap) from SNG Barratt. The canister is covered in blue painter’s tape just to keep it clean during the restoration build. I was able to reuse the original rubber protective cap. An 18AWG light green wire is connected to one terminal. This wire joins via a 4 way snap connector with an orange 18 AWG wire from the handbrake switch. A single orange 18 AWG wire then connects to the LH Barrier Block Terminal #5B. A dark green wire from LH Barrier Block #5A connects to a 2 way snap connector with a red/green wire on the dash warning light pigtail.

A black 14 AWG wire connects to the other level indicator switch terminal and provides a ground connection to the chassis.

Hydraulic Fluid Container Wiring

Hydraulic Fluid Container Wiring