Headlamps

Headlamp Diagrams:

Headlamp Components:

Locations of components

3 Earthing point
In the fascia

7 Earthing point
On the radiator cross-member

8 Lighting relay
In the electrical distribution box in the engine compartment, relay positions A and B

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

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

12 Dipped beam filament
In the left-hand and right-hand headlamps

13 Parking lights
In the front light clusters

14 Rear lights, 3-D and 5-D
In the rear light clusters and on the tailgate
Rear lights, 2-D and 4-D
In the rear light clusters

15 Number plate illumination
On the tailgate (3-D and 5-D) on the rear sill (2-D and 4-D)

17 Extra rheostat for the lighting of switches and controls
On the left-hand side of the fascia

20 Ignition switch
On the centre console between the front seats

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

47V Warning lamp, headlamps switched on
In the combined instrument in the instrument panel

58 12-pole connector
On the angle bracket, under the fascia on the left-hand side (behind the knee shield)

59 2-pole connector
In the fascia, beside light switch 10

60 Single-pole connector (GB) (1989 model)
Two in the electrical distribution box, in the engine compartment, on the left-hand wheel housing

113 Relay for the electrically heated rear window
In the electrical distribution box in the engine compartment, relay position C

152A 29-pole white connector
152B 29-pole red 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

158 Negative distribution terminal
In the electrical distribution box in the engine compartment, on the left-hand wheel housing

215 Dip switch
On the left-hand side of the steering column

234 Side marker lights
In the front light clusters

Operation
The head lamps can be switched on only when ignition switch 20 is in the parked or drive position. Current will then flow to terminal X of light switch 10.

Full beams
When the light switch is in position 2, the supply will be taken from terminal 56 to the "upper" coil in lighting relay 8, via red 29-pole connector 152B. The relay coil will be energized and the contacts will be set to their "right-hand" position. Full beam filaments 11 are supplied (+30) via the contacts of the "lower" coil and terminal 56A, across fuses 14 and 15.

The "lower" coil is used for switching between full beam and dipped beam. Each time the coil is energized by operation of dip switch 215, the contacts change position and remain there until the dip switch is operated again.

The supply from fuse 15 is also taken to full beam warning lamp 47G in the combined instrument.

Headlamp flasher
The full beams can also be switched on by means of dip switch 215, regardless of the setting of the ignition switch and the light switch.

When the dip switch is operated, both coils in the lighting relay will be energized. Full beam filaments 11 are then supplied (+30) from terminal 30 of lighting relay 8, via the relay contacts and terminal 56A.

Dipped beams
When the light switch is in position 2, the supply will be taken from terminal 56 to the "upper" coil in lighting relay 8, via 29-pole red connector 152B. The relay coil will be energized and the contacts will be set to their "right-hand" position. Dipped beam filaments 12 are supplied (+30) via the contacts of the "lower" coil and terminal 56B, across fuses 16 and 17.

Parking lights
When the headlamps are switched on, parking lights 13, which also include rear lights 14 and number plate illumination 15, will also be alight. (On certain markets, side marker lights 234 are also included.)

When the headlamps are switched on, the supply to the parking lights is taken from light switch 10 in position 2 via terminals X and 58. The parking lights are discussed in a separate section.

GB market (1989 model)
Cars delivered to the GB market also have dim dipped beams. These cars are fitted with two single-pole connectors (60) in the electrical distribution box.

Cars for Italian market and 1990 models for GB Cars delivered to these market are fitted with warning lamp 47V which shows when the headlamps are switched on.

Fault-tracing hints
The headlamps will be operative when ignition switch 20 is in the drive position and when light switch 10 is in position 2.

1. Check fuses 14 and 15 (full beams) and fuses 16 and 17 (dipped beams) and check that the supply to them is live.
2. Check the bulbs and check that the supply to them is live. Check the earthing at each lamp.
3. Check the light switch, the lighting relay and the terminals of the dip switch.
4. Check the connectors, cable harnesses and earth connections.