Interior Lighting

Interior Lighting Diagrams:

Interior Lighting Components:

Locations of components

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

50 Roof lamp,side
On the roof of the interior, at the left-hand door pillar

51 Roof lamp, front
On the roof, behind the inside rear-view mirror

52 Ignition switch lighting
Between the front seats, at the ignition switch

53 Interior lighting switch
Between the front seats, at the gear lever

54 Door switches, interior lighting
In each door pillar

57 3-pole connector
Between the front seats, under the centre console

58 12-pole connector
Under the facia, to the left of the steering column (behind the knee shield)

60 Single-pole connector
Between the front seats, under the centre console

65 Earthing point
At the handbrake

82 Seat belt/ignition switch warning relay
Under the back seat, on the left-hand side

123 4-pole connector
Under the back seat, on the left-hand side, at the time-delay relay

151 Time-delay relay for the interior lighting
Under the back seat, on the left-hand side

152A 29-pole white connector
In the electrical distribution box in the engine compartment, on the left-hand wheel housing. The connector is accessible from the interior of the car.

Operation
There are two versions of the interior lighting system - one with a time delay and one without. Cars with delayed extinguishing of the interior lighting are equipped with an extra relay 151 (see the special section below).

The lights are supplied across fuse 28 and the 29- pole white connector 152A, regardless of the position of the ignition switch.

The interior lights can be switched on and off by means of the switch in roof lamp 50, located at the left-hand door pillar, or by means of interior lighting switch 53, at the ignition switch.

When the switch in roof lamp 50 is in position 3 (lower position), lamp 50, front roof lamp 51 and ignition switch lamp 52 are always on.

In position 1 (upper position), the interior lights will be switched on if one of the door switches (54) is closed, i.e. if a door is opened. In the centre position, the interior lights are always off.

When the switch in roof lamp 50 is in position 1, the interior lights can also be switched on and off by operating interior lighting switch 53, at the ignition switch.

On cars for the U.S.A., Canadian and Japanese markets, door switch 54 for the left-hand front door is supplied via seat belt/ignition switch warning relay 82.

Time delay
Cars with the interior lighting delay are equipped with time-delay relay 151, which is supplied across fuse 12 when the ignition switch is in the drive position, and with a constant supply from distribution terminal +30, regardless of the position of the ignition switch.

When the interior lights are switched on, by a door being opened or a switch being operated, terminal T is earthed and relay 151 is energized.

When the circuit is subsequently broken, by the door being closed or the switch being operated, the interior lighting will remain switched on, since the timing circuit of the relay will keep the earth circuit closed across terminals T and 31.

The time delay is around 15 seconds, but will be interrupted if the ignition switch is turned to the drive position. A positive voltage (from +54) is then supplied to terminal 15 of the relay. Both terminals - 15 and 30 - then receive a positive supply, the relay is thus de-energized, and the earth circuit across terminals T and 31 is broken.

Fault-tracing hints
1. Check fuse 28 and check that the supply to it is live.

2. Check the bulbs for the interior lighting and check that the supply to them is live.

3. Check the switches and door switches.

4. Check the connectors, cable harnesses and earth connections.

Time delay
On cars with time delay, check also the following points:

1. Turn the ignition switch to the drive position. Check fuse 12 and check that the supply to it is live.

2. Check that terminals 15 and 30 of relay 151 are live.