Headlamp
Headlamps Diagrams:
Headlamps Components:
Locations of components
1 Battery
On the left-hand side of the engine compartment
3 Earthing point, facia
At the left-hand front speaker socket
7 Earthing point
On the left-hand wheel housing
8 Lighting relay
1987: in the electrical distribution box behind the glove compartment
1988: in the electrical distribution box in the engine compartment, behind the left-hand headlamp
10 Light switch
On the left-hand side of the facia
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
In the rear light clusters
15 Number plate illumination
On the luggage compartment lid
16 Instrument lighting rheostat
On the facia, on the left-hand side of the steering wheel
20 Ignition switch
On the right-hand side of the steering column
21 Ignition switch relay
In the electrical distribution box behind the glove compartment
22A Fuse board
Behind the access panel in the glove compartment
47G Full-beam warning lamp
In the combined instrument on the facia
57 Three-pole connector
Behind the combined instrument 75 Distribution block in the engine compartment, forward of the battery
82 Seat belt/ignition switch warning relay
In the electrical distribution box behind the glove compartment
110 Tachometer
In the combined instrument on the facia
113 Relay/time-delay relay for the rear window heater
In the electrical distribution box behind the glove compartment
132 Sensor for the speed transmitter
In the speedometer
155 Relay, AC/ACC
In the electrical distribution box behind the glove compartment
156 Time-delay relay, AC/ACC
In the electrical distribution box, behind the glove compartment
158 Negative distribution terminal
In the electrical distribution box behind the glove compartment
159 Distribution terminal +15
In the electrical distribution box behind the glove compartment
211 Earthing point
On the gearbox
213 Pictogram
In the combined instrument on the facia
215 Dip switch
On the left-hand side of the steering column
228A Filament monitor
In the electrical distribution box behind the glove compartment (1987)
228B Filament monitor
In the electrical distribution box in the engine compartment, behind the left-hand headlamp (1988)
234 Side marker lights
In the front light clusters
342A Fuse board
In the electrical distribution box in the engine compartment, behind the left-hand headlamp
Operation
When the headlamps are switched on, the parking lights (which also include the rear lights and the number plate illumination) will also be alight. The parking lights are discussed in a separate section.
Full beam
The full beam 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.
When the light switch is in position 2, the lighting relay will be supplied from terminal 56 on the light switch. The full beam lamps will then be supplied via:
lighting relay 8
dip switch 215, which should be in position HH, and then from terminal 56A to
fuses 27 and 28 and then to corresponding full beam filament 11.
The supply from fuse 28 is also taken to full-beam warning lamp 47G.
When the full beam is switched on, the supply to the parking lights is taken from the light switch in position 2, across terminal 58.
The full beam can also be switched on by moving the dip switch to position HB, regardless of the position of the ignition switch and the light switch.
The supply is taken across terminal 30 of light switch 10 to terminal 30 of dip switch 215. When the dip switch is moved to position HB, current will flow across terminal 56A to the full-beam filaments.
Dipped beam
When the light switch is in position 2, the lighting relay will be supplied from terminal 56 on the light switches. The dipped beam lamps will then be supplied via:
lighting relay 8
dip switch 215, which is in position 0, and then from terminal 56B to
filament monitor 228A and from its terminals to
fuses 25 and 26, and from there to each dipped beam filament 12.
If one of the dipped beam bulbs should fail, the relay for the dipped beam in the filament monitor will be energized and terminal C2 will be earthed. Since a positive voltage (from fuse 13) is supplied to terminal 7 of pictogram 213, the warning lamps for the front lights and the central warning lamp will light up. See also the section entitled "Pictogram - Filament monitor".
When the dipped beam is switched on, the parking lights will receive their supply from the light switch in position 2, via terminal 58.
Fault-tracing hints
The headlamps will be operative when ignition switch 20 is in the parked or drive position and when light switch 10 is in position 2.
1. Check fuses 27 and 28 (full beam) and fuses 25 and 26 (dipped beam) 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 and the filament monitor.
4. Check the connectors, wiring and earth connections.
For particulars of fault tracing on the parking lights, see "Parking lights".
NOTE:
Whenever any of the bulbs needs changing, use a bulb of the correct rating. The bulbs in the pictogram may otherwise light up due to imbalance in the filament monitor coil.