DESCRIPTION AND OPERATION
RANGE ROVER 4.15
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.
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