Steering Wheel Heater Power Distribution

Steering Wheel Heater Power Distribution

Feed from the positive battery terminal (C0192) is supplied to the steering wheel relay and fuse 53 of the passenger compartment fuse box (C0632) on an R wire. Fuse 53 (C0583) is connected to the ignition switch (C0099 on Td6 vehicles, C0028 on V8 vehicles) by an R wire. When the ignition switch is turned to the 'ignition' position, current flows across the switch (C0099 on Td6 vehicles, C0028 on V8 vehicles) to the steering wheel relay coil (C0585) on a G wire. The steering wheel relay coil (C0585) is earthed on an N wire.

Steering Wheel Heater

The energised steering wheel relay provides a feed to fuse 29. Fuse 29 (C0582) is connected to the rotary coupler (C0374) by a GB wire, allowing the rotary coupler to provide a feed to the heated steering wheel ECU (C1948) on an N wire. The steering wheel ECU is earthed via the rotary coupler on an R then N wire.