Land Rover Defender V8i Electrical Library Rover Manual

							DESCRIPTION AND OPERATION
4.30
DEFENDER V8i
The RH side of the vehicle operates in much the same way. Fuse 12 (C581-4)
supplies a feed to the RH front side lamp (C537-2) on a red/orange wire. The
side lamp is earthed (C537-1) is earthed on a black wire. Connected in parallel
with the side lamp is the trailer pick-up (C1144-1), which is also supplied a feed
on a red/orange wire. The trailer pick-up (C1144-2) is connected to the RH tail
lamp (C125-3), again on a red/orange wire. The lamp is earthed (C125-1) on a
black wire.
Fuse 12 of the passenger compartment fuse box (581-4) also supplies a feed
to the instrument pack warning lamp (C230-8) on a red/orange wire. The
warning lamp is earthed (C230-4) on a black wire.
Headlamps
With the lighting switch in position 2, power flows through the switch (C41-4) to
the headlamp relay (C282-87) on a blue/yellow wire. The headlamp relay will
not be energised unless the ignition switch is in position II.
Dipped Beam
With the ignition switch in position II current flows across the switch (C90-1) to
fuse 1 of the passenger compartment fuse box (C580-1) on a white wire. Fuse
1 (C580-2) supplies a feed to the headlamp relay coil (C282-85) on a
white/green wire. The relay is earthed (C282-86) on a black wire. This feed
energises the headlamp relay.
The lighting switch (C41-4) is now able to supply a feed to both the column
switch (C36-1) and fuse 6 of the passenger compartment fuse box (C580-11)
on blue wires. Fuse 6 (C580-12) supplies a feed to the fog ECU (C543-2) on a
blue/purple wire.
With the column switch in the dipped beam position, current flows from the
switch (C36-6) to fuses 7 and 8 (C580-13) of the passenger compartment fuse
box on a blue/red wire. Fuse 7 (C580-14) supplies a feed to the RH headlamp
dipped beam bulb (C11-2) on a blue/black wire. The lamp is earthed (C11-3)
on a black wire. Fuse 8 (C580-16) supplies a feed to the LH headlamp dipped
beam bulb (C9-2) on a blue/pink wire. The lamp is earthed (C9-3) on a black
wire. 
						

							DESCRIPTION AND OPERATION
DEFENDER V8i4.31
Main Beam
When the column switch is moved to the main beam position, current flows
from the switch (C36-5) to fuses 9 and 10 (C580-17) of the passenger
compartment fuse box, and the main beam warning lamp (C230-6) in the
instrument pack. All are connected by blue/white wires.
Fuse 9 (C580-18) supplies a feed to the RH headlamp main beam bulb (C11-1)
on a blue/orange wire. Fuse 10 (C580-20) supplies a feed to the LH headlamp
main beam bulb (C9-1) on a blue/slate wire. Both lamps (C11-3 & C9-3
respectively) are earthed on black wires.
Headlamp Flash
Fuse 2 of the engine compartment fuse box (C573-3) supplies a constant
battery feed to the column switch (C36-7) on a purple wire. When the column
switch is pulled back to the flash position, it allows this current to flow along the
main beam circuit as described in the Main Beam description. 
						

							DESCRIPTION AND OPERATION
4.32
DEFENDER V8i
EXTERIOR LAMPS - Headlamp Levelling
DESCRIPTION
To prevent dazzling oncoming drivers, the headlamps can be adjusted to
compensate for the effect of different loads on headlamp vertical alignment.
Headlamp levelling is controlled by a four position switch mounted in the centre
of the fascia, which operates a levelling motor on each headlamp. Nominal
vehicle loads for each switch position are as follows:
·0 - Driver or driver and front passenger only; no luggage.
·1 - All seats occupied; no luggage.
·2 - All seats occupied; full luggage compartment.
·3 - Driver only; full luggage compartment.
Headlamp levelling operates while the side lamps or headlamps are on.
OPERATION
Feed from the positive battery terminal is connected to fusible link 6 of the
engine compartment fuse box (C1217-1) on a brown wire. Fusible link 6
supplies a feed to the lighting switch (C41-1) on a brown wire.
With the lighting switch in either the side or main beam position, current is
allowed to flow from the switch (C41-2) to fuse 12 of the passenger
compartment fuse box (C581-1) on a red wire. Fuse 12 (C581-4) supplies a
feed to the LH headlamp levelling motor (C71-1), the RH headlamp levelling
motor (C70-1), and the headlamp levelling switch (C93-4). All 3 are connected
in parallel and are supplied a feed on red/orange wires. Fuse 12 also supplies
a feed to the headlamp levelling switch illumination bulb (C93-5), again on a
red/orange wire. All are earthed on black wires.
At each of the four switch positions, the contacts in the headlamp levelling
switch connect to a different resistance value to provide one of four different
output voltages. The output voltage (C93-2) is supplied to the LH (C71-3) and
RH (C70-3) levelling motors on blue/yellow wires. The motors are earthed
(C71-2 & C70-2 respectively) on black wires.
The difference between the voltage from the headlamp levelling switch and
battery voltage is then used by electronics in the headlamp levelling motors to
set the headlamps to a position corresponding to the switch position. 
						

							DESCRIPTION AND OPERATION
DEFENDER V8i4.33
EXTERIOR LAMPS - Rear Fog Lamps
DESCRIPTION
The rear fog lamps only operate when the headlamps are illuminated and the
ignition switch is in position II. The non- latching switch is positioned to the
right of the steering column, adjacent the HRW switch. When the rear fog
lamps are switched on, the instrument pack warning lamp also illuminates. The
fog lamps are automatically switched off every time the ignition is turned off.
OPERATION
Feed from the positive battery terminal is connected to the engine compartment
fuse box (C1217-1) by a brown wire. Current flows through fusible link 5 and
fusible link 6 of the engine compartment fuse box, which are connected in
parallel.
Fusible link 6 of the engine compartment fuse box (C572-3) is connected to the
lighting switch (C41-1) by a brown wire. With the lighting switch in either the
side or main lamp position, current flows across the switch (C41-4) to the
headlamp relay (C282-87) on a blue/yellow wire. As the relay is not energized,
the relay switch is open, thus preventing current flow.
Fusible link 5 of the engine compartment fuse box (C570-2) is connected to the
ignition switch (C28-1) by a brown wire. With the ignition switch in position II
(C90-1), current flows to fuse 1 of the passenger compartment fuse box
(C580-1) on a white wire. Fuse 1 (C580-2) supplies a feed to the headlamp
relay coil (C282-85) on a white/green wire. The relay coil is earthed (C282-86)
on a black wire.
With the relay coil energized, the relay switch closes, allowing current to flow
from the headlamp relay (C282-30) to fuse 6 of the passenger compartment
fuse box (C580-11) on a blue wire. Fuse 6 of the passenger compartment fuse
box (C580-12) is connected to the rear fog guard lamp ECU (C543-2) by a
blue/purple wire. 
						

							DESCRIPTION AND OPERATION
4.34
DEFENDER V8i
The rear fog guard lamp ECU (C543-4) is connected to the rear fog guard lamp
switch (C64-2) by a red/slate wire. When the switch is depressed momentarily,
it provides an earth (C64-3) on a black wire. The fog guard lamp ECU is also
earthed (C543-1) directly on a black wire. When the ECU senses the second
earth via the switch, it provides a feed (C543-3) to the instrument pack warning
lamp (C230-1), the RH rear fog guard lamp (C512-1), and the LH rear fog
guard lamp (C515-1). All three are connected in parallel by red/yellow wires,
and earthed on black wires. 
						

							DESCRIPTION AND OPERATION
DEFENDER V8i4.35
EXTERIOR LAMPS - Indicators / Hazard Warning Lamps
DESCRIPTION
The indicators are controlled from the steering column switch and operate
when the ignition switch is in position II.
The hazard lamp switch is located to the right of the steering column, adjacent
the rear fog lamp switch. Hazard operation is not dependent on the position of
the ignition switch. When the hazard switch is depressed, both left and right
hand indicator lamps flash.
OPERATION
Feed from the positive battery terminal is connected to the engine compartment
fuse box (C1217-1) by a brown wire. Power flows through fusible link 5 and
fuse 5, which are connected in parallel. Fusible link 5 (C570-2) provides a feed
to the ignition switch (C28-1) on a brown wire. Fuse 5 (C574-3) provides a
permanent battery feed to the hazard warning switch (C96-7) on a
brown/purple wire.
Indicators
With the ignition switch in position II, power flows across the ignition switch
(C90-1) to fuse 17 of the passenger compartment fuse box (C581-13) on a
white wire. Fuse 17 (C581-14) is connected to the hazard warning switch
(C96-8) by a green wire. With the hazard warning switch in the off position,
power flows through the switch (C96-5) and up to the flasher unit (C536-6) on a
light green wire. The flasher unit is earthed (C536-4) on a black wire. With the
flasher unit energised, a feed (C536-8) is sent to the column switch (C36-3) on
a light green/brown wire. 
						

							DESCRIPTION AND OPERATION
4.36
DEFENDER V8i
Left Turn
Moving the column switch to the left turn position, allows power to flow across
the switch (C36-4) to:
·The LH trailer pick-up (C1149-1).
·The LH rear indicator lamp (C928-2).
·The LH front indicator lamp (C1-2).
·The LH side repeater lamp (C13-1).
·The LH indicator instrument pack warning lamp (C230-5).
All are supplied a feed on green/red wires, and earthed on black wires. With
the flasher circuit complete, the flasher unit commences opening and closing
the circuit, causing the LH indicator lamps to flash.
Right Turn
Moving the column switch to the right turn position allows power to flow across
the switch (C36-2) to:
·The RH trailer pick-up (C1151-1).
·The RH rear indicator lamp (C837-2).
·The RH front indicator lamp (C2-2).
·The RH side repeater lamp (C12-1).
·The RH indicator instrument pack warning lamp (C233-7).
All are supplied a feed on green/white wires and earthed on black wires. With
the flasher circuit complete, the flasher unit commences opening and closing
the circuit, causing the RH indicator lamps to flash. 
						

							DESCRIPTION AND OPERATION
DEFENDER V8i4.37
Hazards
The hazard warning switch (C96-7) is supplied with a permanent battery feed
from fuse 5 of the engine compartment fuse box (C574-3) on a brown/purple
wire. Pressing the switch to the on position allows power to flow across the
switch (C96-5) to the direction indicator relay (C536-6) on a light green wire.
The energised relay is now able to provide a feed (C536-8) for both the LH and
RH indicator circuits on a light green/brown wire. The relay is connected to the
following via the hazard warning switch:
·The front LH indicator (C1-2) on a green/red wire.
·The LH side repeater (C13-1) on a green/red wire.
·The LH trailer pick-up (C1149-1) on a green/red wire.
·The rear LH indicator (C928-2) on a green/red wire.
·The front RH indicator (C2-2) on a green/white wire.
·The RH side repeater (C12-1) on a green/white wire.
·The RH trailer pick-up (C1151-1) on a green/white wire.
·The rear RH indicator (C837-2) on a green/white wire.
The hazard warning switch also provides a feed for the following warning
lamps:
·The hazard warning lamp (C1037-1) on a brown/red wire.
·The LH indicator warning lamp (C230-5) on a green/red wire.
·The RH indicator warning lamp (C233-7) on a green/white wire.
With the direction indicator relay energised, the circuit is repeatedly open and
closed, causing all indicators and warning lamps to flash. 
						

							DESCRIPTION AND OPERATION
4.38
DEFENDER V8i
INTERIOR LAMPS
DESCRIPTION
The Defender 50LE is provided with two interior lamps, one in the front and one
in the rear of the vehicle. Both lamps can be switched on manually using their
integral switches. If any door, including the tail door are opened, the lamps will
illuminate.
The lamps are controlled by the Alarm ECU. The ECU contains a time out
feature which switches off the interior lamps after eight minutes if any door is
left open, thus preventing unnecessary battery drain.
OPERATION
Feed from the positive battery terminal is connected to fusible link 1 and fusible
link 5 of the engine compartment fuse box (C1217-1) by a brown wire. Fusible
link 1 is connected in series with fuse 1 in the engine compartment fuse box,
while fusible link 5 (C570-2) supplies a feed to fuse 2 (C580-3) of the
passenger compartment fuse box on a brown wire.
Fuse 1 (C573-4) supplies a feed to the rear interior lamp (C356-3) on a purple
wire. The rear interior lamp has an integral switch. With this switch in the
normal (central) position, the lamp is earthed (C356-1) via the alarm ECU
(C61-1) on a purple/white wire. The alarm ECU will only provide an earth path
for the lamp if either of the front doors or the tail door are open.
The Alarm ECU (C61-5) is connected to the LH door switch (C106-1) by a
slate/white wire. The RH door switch (C265-1) and the tail door switch (C615-1)
are wired in parallel and are connected to the alarm ECU (C61-16) via
purple/blue wires.
If the internal switch is moved to the forward ON position, the feed from fuse 1
is allowed to flow across the interior lamp (C356-3 & C1209-1) straight to earth
on a black wire. Moving the switch to the rear OFF position, breaks the circuit,
extinguishing the lamp. 
						

							DESCRIPTION AND OPERATION
DEFENDER V8i4.39
The front interior lamp works on the same principle.
Fuse 2 of the passenger compartment fuse box (C580-4) supplies a feed to the
front interior lamp (C355-3) on a purple wire. The front interior lamp has an
integral switch. With this switch in the normal (central) position, the lamp is
earthed (C355-1) via the Alarm ECU (C61-1) on a purple/white wire. The Alarm
ECU will only provide an earth path for the lamp if either of the front doors or
the tail door are open.
The alarm ECU (C61-5) is connected to the LH door switch (C106-1) by a
slate/white wire. The RH door switch (C265-1) and the tail door switch (C615-1)
are wired in parallel and are connected to the alarm ECU (C61-16) via
purple/blue wires.
If the internal switch is moved to the forward ON position, the feed from fuse 2
is allowed to flow across the interior lamp (C355-3 & C1210-1) straight to earth
on a black wire. Moving the switch to the rear OFF position, breaks the circuit,
extinguishing the lamp.