and the head etc.
EXTERIOR LAMPS - Head, Side and Number Plate Lamps
DESCRIPTION
The lights are operated from the lighting switch located on the steering column.
The lighting switch has two positions. Position 1 switches on the tail lamps, the
number plate lamps, and the front side lamps. Position 2 additionally switches
on the front headlamps. When the headlamps are on, the column switch can be
used to switch between main beam and dipped beam.
The headlamps can be flashed with the lights on or off, by pulling the column
switch towards the driver.
OPERATION
Feed from the positive battery terminal is connected to the engine compartment
fuse box (C1217-1) by a brown wire. Current passes through fusible link 1,
fusible link 5, and fusible link 6, which are all connected in parallel.
Side Lamps
Fusible link 6 (C572-3) is connected to the lighting switch (C41-1) by a brown
wire. With the lighting switch in position 1, current flows across the switch
(C41-2) to fuse 11 and 12 (C581-1) of the passenger compartment fuse box.
Fuse 11 (C581-2) supplies the LH side of the vehicle, while fuse 12 (C581-4)
supplies the RH side of the vehicle.
Current flows from fuse 11 (C581-2) to the LH front side lamp (C538-2) on a
red/black wire. The side lamp is earthed (C538-1) on a black wire. Connected
in parallel with the side lamp is the trailer pick-up (C1189-1), which is also
supplied a feed on a red/black wire. The trailer pick-up (C1189-2) is connected
in series with the LH tail lamp (C121-3) by a red/black wire. The tail lamp is
earthed (C121-1) on a black wire. Wired in parallel with the LH tail lamp is the
rear number plate lamp (C138-1). Again, current is supplied on a red/black
wire. The lamp is earthed (C1190-1) on a black wire.
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.
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.