Notes on Rear Wiring
The wiring to the rear of the car is quite straightforward. The main loom is fed from a 9 way connector which supplies power to the rear lamps, handbrake warning lamp and the fuel tank sender.The 9 way connector is found on the right hand inside of the bulkhead, emerging from behind the trim. P clips secure the loom to the ash frame, where it follows the right hand sill board to the rear of the car. The loom branches off and follows the steel cross member in front of the drivers seat to the center line of the car where it is connected by a black cable with white tracer to the handbrake warning switch. Figure 1 shows the layout of cables found in Morgans from 1970 to 1989. My 1972 car was not wired for a reversing light or rear fog lamp and I did not add them when I rebuilt the car. Whilst keeping the car original as possible, it makes sense to keep as safe as possible and I may add them at some time.
The circuit diagram for a 1972 Morgan shows the reversing light connected via the auxiliary fuse by a green wire to the reversing light switch. The Lucas7FJ fuse box has a double row of lucar connectors. If you are adding a reversing light, connect a green wire to the lower lucar connector beneath the two green wires on the fuse box and run it to the reversing light switch on the gearbox. DO NOT connect it on the side of the fuse box with the white wire from the ignition switch. Run a green wire with brown tracer from the reversing light switch to the Lucas L691 reversing lamp, which also requires a black wire connected to earth. A four way bullet connector at the rear of the car will allow you to run two lamps in parallel. To add a fog lamp, connect a red wire to the lucar connection beneath the two red wires and run it to the fog lamp switch. DO NOT connect it on the side of the box fed by the red with green tracer wire. Run a red wire with yellow tracer from the fog lamp switch to the a Lucas L921 fog lamp.