Extra Fog Lights

Extra Fog Lamp Components:

Extra Fog Lamp Diagrams:

Locations of components

3 Earthing point
In the facia

7 Earthing point
On the radiator cross-member

10 Light switch
On the left-hand side of the facia

11 Full beam
In the left-hand headlamp

17 Extra rheostat
For the lighting of switches and controls on the facia

22 Fuse box
In the electrical distribution box in the engine compartment, on the left-hand wheel housing

85 Extra fog lamps
Under the front bumper

88 Switch for extra fog lamps
On the facia

107 Relay for extra fog lamps
On cars with 8-valve engines: in the engine compartment, in the Lambda relay box, forward of the left-hand wheel housing
On cars with 16-valve engines: in the electrical distribution box on the left-hand front wheel housing

152B 29-pole red connector
152C 29-pole black connector
In the electrical distribution box in the engine compartment, on the left-hand wheel housing The connectors are accessible from the interior of the car

Operation
Extra fog lamps are fitted to cars for certain markets only.

The fog lamps are wired so that they can be switched on only when the parking lights or dipped beams are on.

When light switch 10 is in position 1 (parking lights) or 2 (full beam/dipped beam), the switch for the extra fog lamps (88) is supplied via the 29-pole red connector 152B and fuse 18 (also for the parking lights on the left-hand side of the car).

When the switch is depressed, the lamp in the switch lights with full brightness, and relay 107 is energized. The coil of relay 107 is earthed via the filament for left-hand full beam 11.

Both extra fog lamps 85 then receive a positive supply across fuse 21, via the relay contacts, which are closed.

When the full beams are switched on, the relay will be de-energized, and the fog lamps will be switched off, even though the switch is depressed. This is due to the fact that a positive voltage is then being supplied to both sides of the relay coil.

Fault-tracing hints
The extra fog lamps can be switched on by setting light switch 10 to position 1 or 2, while switch 88 is depressed.

1. Check fuses 18 and 21 and check that the supply to them is live.

2. Check the filament for the left-hand full beam (relay 107 is earthed through this bulb).

3. Check each fog lamp and check that the supply to it is live. Check the earthing at the lamp.

4. Check fuse 14. If the fuse has blown, the fog lamps will not be extinguished when the full beams are switched on.

5. Check relay 107, light switch 10 and switch 88, by measuring at the terminals.

6. Check the corresponding cable harness and earth connections.