Discovery II (LT) V8-4.0L (2002)
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When the electric mirror switch is operated in the down position the feed from fuse 30 passes through the switch contacts and is connected to the mirror
vertical adjustment motor on an SW wire, via splice joint A9 and header joint C0285 LHD/C0282 RHD
The earth path for the motor is connected as follows:
^
On LHD vehicles, the earth path is on a BK wire to connector interface C0733-7/C0464-7. From the connector interface the earth is connected to
the mirror switch on a BN wire.
^
On RHD vehicles, the earth path is on a BK wire to the mirror switch.
Horizontal - left
When the electric mirror switch is operated in the left position the feed from fuse 30 passes through the switch contacts and is connected to the mirror
horizontal adjustment motor on an SW wire, via splice joint A9 and header joint C0285 LHD/C0292 RHD.
The earth path for the motor is as follows:
^
On LHD vehicles, the earth path is on a BU wire to connector interface C0733-8/C0464-8. From the connector interface the earth is connected to
the mirror switch on a BP wire.
^
On RHD vehicles, the earth path is on a BU wire to the mirror switch.
Horizontal - right
When the electric mirror switch is operated in the right position the feed from fuse 30 passes through the switch contacts end is connected to the mirror
horizontal adjustment motor. The wire connections are as follows:
^
On LHD vehicles, the connection from the switch is on a BP wire to connector interface C0464-8/C0733-8. From the connector interface the
connection continues to the motor on a BU wire.
^
On RHD vehicles, the connection from the switch is on a BU wire to the motor.
Mirror heater
The LH end RH door mirror heaters are connected from the heated rear screen relay in the passenger compartment fusebox on an NP wire via splice
joints A19/A167.
When the heated rear window switch is operated an earth path is completed from the switch on a B wire, via header C0760, to earth header C0017
LHD/C0018 RHD. The switch is connected on an NB wire to pin C0663-5 on the BCU.
On vehicles with Air Temperature Control (ATC) when the demist function is selected the ATC ECU provides an earth path on an NB wire through
splice joint A249, to pin C0663-5 on the BCU.
The completed earth path is interpreted by the BCU as a signal for heated rear screen operation. The BCU is connected from pin C0661-1 on an SK wire
to the the IDM in the passenger compartment fusebox. The SK wire is the serial data bus between the BCU and the IDM.. The BCU passes a signal to
the IDM which in turn provides an earth path, on a B wire to earth header C0551 for the coil of the heated rear screen relay in the passenger
compartment fusebox
The heated rear screen relay coil is energised by the feed from fuse 13 in the engine compartment fusebox causing the relay contacts to close. With the
contacts closed, a feed from fuse 8 in the passenger compartment fuse box passes through the relay and is connected from the fusebox on an NP wire to
splice joints A19/A167. From the splice joints the feed is connected on NP wires to the driver and passenger door mirror heaters.
On LHD vehicles the driver's door mirror heater is connected on a B wire, via splice joint A34 and header C0288, to earth header C0017. The passenger
door mirror heater is connected on a B wire, via splice joint A34 to earth header C0018.
On RHD vehicles, the driver's door mirror heater is connected on a B wire via splice joint A34, to earth header C0018. The passenger door mirror is
connected on a B wire, via splice joint A34, to earth header C0017.
The door mirror heaters will operate for as long as the heated rear screen relay is energised.
