Rear Power Distribution

Rear Power Distribution

Feed from the positive battery terminal (C0192) is supplied to fuse 53 and fuse 60 of the passenger compartment fuse box (C0632) on an R wire. Fuse 60 (C0582) provides a constant battery feed to the BCU (C0662) on an RW wire.

Fuse 53 (C0583) provides a constant battery feed to the ignition switch (C0099 on Td6 vehicles, C0028 on V8 vehicles) on 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 BCU (C0660) on a PW wire.

RH Rear Window

The BCU (C0660) provides a feed to the RH rear window switch (C0732) on SY then N and SU then SB wires. If the switch is moved to the 'Up' position, the switch contacts close momentarily, allowing the feed on the SY then N wire to flow to earth on an N wire. Sensing this earth path, the BCU (C0662) provides a feed to the RH rear window lift motor (C0304) on a BN then BG wire. Current flows across the motor (C0304) and back to the BCU (C0662) on a US then UP wire. When the current draw of the window lift motor increases, the BCU determines the window has reached the limit of its travel and cuts the supply to the motor.

If the switch is moved to the 'Down' position, the switch contacts close momentarily, allowing the feed on the SU then SB wire to flow to earth on an N wire. Sensing this earth path, the BCU (C0662) provides a feed to the RH rear window lift motor (C0304) on a UP then US wire. Current flows across the motor (C0304) and back to the BCU (C0662) on a BG then BN wire. When the current draw of the window lift motor increases, the BCU determines the window has reached the limit of its travel and cuts the supply to the motor.

LH Rear Window

The BCU (C0660) provides a feed to the LH rear window switch (C0732) on SN and SB wires. If the switch is moved to the 'Up' position, the switch contacts close momentarily, allowing the feed on the SN wire to flow to earth on an N wire. Sensing this earth path, the BCU (C0662) provides a feed to the LH rear window lift motor (C0304) on a BG wire. Current flows across the motor (C0304) and back to the BCU (C0662) on a US wire. When the current draw of the window lift motor increases, the BCU determines the window has reached the limit of its travel and cuts the supply to the motor.

If the switch is moved to the 'Down' position, the switch contacts close momentarily, allowing the feed on the SB wire to flow to earth on an N wire. Sensing this earth path, the BCU (C0662) provides a feed to the LH rear window lift motor (C0304) on a US wire. Current flows across the motor (C0304) and back to the BCU (C0662) on a BG wire. When the current draw of the window lift motor increases, the BCU determines the window has reached the limit of its travel and cuts the supply to the motor.