Extra Fog Lamps

Extra Fog Lamp Components:

Extra Fog Lamp Diagrams:

Locations of components

3 Earthing point
In the fascia

7 Earthing point
On the radiator cross-member

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

11 Full beam filament
In the left-hand and right-hand headlamps

17 Extra rheostat for the lighting of switches and controls
On the fascia

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

47G Full beam warning lamp
In the combined instrument in the instrument panel

85 Extra fog lamps
Under the front bumper

88 Switch for extra fog lamps
On the fascia

107 Relay for extra fog lamps
In the electrical distribution box in the engine compartment, relay position D

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 only to cars destined for the USA and Canada, and to the 1989 models for JP

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

On cars supplied to Canada, the extra fog lamps can be switched on regardless of the position of light switch 10.

When light switch 10 is in position 1 (parking lights) or 2 (full beam/dipped beam), switch 88 for the extra fog lamps will be supplied via terminal 30 or terminal X of light switch 10.

When the switch is depressed, relay 107 will be energized, since its coil will be earthed across filaments 11 for the left-hand and right-hand full beams, and across full beam warning lamp 47G. The lamp in the switch will then light up with full brightness.

Both extra fog lamps 85 then receive a positive supply from fuse 21, across 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 if 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.

Cars for the CA market
Cars for this market are equipped with daylight driving lights. Relay 174 for the daylight driving lights gives a positive supply to the extra fog lamps when the light switch is in position 0.

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

1. Check fuse 21 and check that the supply to it is live.
2. Check full beam filaments 11 and full beam warning lamp 47G.
3. Check each fog lamp and check that the supply to it is live. Check the earthing at the lamp.
4. Check fuse 15. 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 their terminals.
6. Check the relevant cable harnessed earth connections.