I have spent a lot of time recently studying the Rover wiring diagrams so that I can understand how each system works within the car and ultimately so that I can reuse as much of the existing wiring where possible.
This wiring schematic has been designed to power the electric reverse motor that I will be fitting, a modified starter motor. I wanted to include a few safety features to prevent the motor being operated whilst the car is in gear and/or whilst the handbrake is applied.
This circuit is based on an additional Auxiliary battery being installed and I will be running a split charge system. A small motorbike battery will be connected to the Yamaha R1 engine loom to power the ECU, clocks and starter logic and a larger auxiliary battery will power all the car functions.
The New Auxiliary Relay in the schematic will be energised by the bike loom once the ignition is in Position 1 but the power will come via the Auxiliary battery.
In order to reverse the car, the following conditions must be met;
1. Must be in neutral to energise the Reverse Relay
2. Handbrake must be off
3. Dash mounted toggle switch must be on - This will illuminate a warning LED and turn the reverse lights on
4. A floor mounted push switch is pressed sending power to the Reverse motor