Rear Power Distribution

Rear Power Distribution

Feed from the positive battery terminal (C0192) is supplied to fuse 27, fuse 53, and fusible link 5 of the passenger compartment fuse box (C0632) on an R wire. Fuse 27 (C0585) provides a constant battery feed to the BCU (C0662) on an RU wire. Fusible link 5 (C0588) is connected to fuse 10 of the rear fuse box (C2024) on an R wire. Fuse 10 (C2021) provides a constant battery feed to the rear screen wiper ECU (C0388) on an RW wire.

Fuse 53 of the passenger compartment fuse box (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 'auxiliary' position, current flows across the switch (C0099 on Td6 vehicles, C0028 on V8 vehicles) to fuse 41 of the passenger compartment fuse box (C0585) on a PB wire. Fuse 41 (C0586) provides an auxiliary ignition feed to the rear screen wiper ECU (C0835) on a PR wire. The ECU is earthed on an N (C0388) and an NB (C0835) wire.

Rear Wiper ECU

Operation of the rear wiper and washer system is controlled by the rear wiper ECU, which is integral with the motor assembly. The ECU (C0835) monitors the condition of the steering wheel switch (C0278) by providing feeds on BW and BU wires. If a request is made for rear wiper or washer operation, an earth path is created on an NB wire.

The rear wiper ECU (C0835) receives a 'reverse gear selected' signal from the Light Check Module (LCM) (C2040) on a UY wire. When the rear wiper ECU receives this feed it powers the rear wiper motor.

Washer

When the rear wiper ECU receives a washer request from the steering wheel switch, it provides a feed to the rear washer pump (C0021) on a BR wire. Current flows across the pump motor (C0021) to earth on an N wire.