Electrical Diagrams

Oil Pressure Warning Lamp Diagrams:

Oil Pressure Warning Lamp Components:

Locations of components

20 Ignition switch
On the centre console between the front seats

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

44 Oil pressure transmitter
On the left-hand side of the engine block, above the oil filter

47D Oil pressure warning lamp
In the combined instrument

58 12-pole connector
Under the knee shield below the facia, on the left-hand side

152A 29-pole white connector (1984 models)
152B 29-pole red connector (1985 and 1986 models)
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.

159 Distribution terminal +15 (1985 and 1986 models)
In the electrical distribution box in the engine compartment, on the left-hand wheel housing

Operation
The oil pressure warning lamp is intended to warn the driver that the engine oil pressure is below the predetermined value. The wiring on 1984 models differs from that of 1985 and 1986 models.

1984 models
When the ignition switch is in the drive position, lamp 47D in the combined instrument is supplied (+15) via the 29-pole white connector 152A.

If the lubricating oil pressure should drop below 0.3 - 0.5 bar, oil pressure transmitter 44 will close and the lamp will light up.

1985 and 1986 models
Lamp 47D in the combined instrument is supplied (+15) from fuse 22, via the 29-pole red connector 152B.

If the lubricating oil pressure should drop below 0.3 - 0.5 bar, oil pressure transmitter 44 will close and the lamp will light up.

Fault-tracing hints
The oil pressure warning lamp will be operative when the ignition switch is in the drive position.

1984 models

1. Check the bulb and check that the supply to its terminals in the combined instrument is live.

2. Remove the cable from the oil pressure transmitter and earth it. If the lamp lights up,the circuit is unbroken.

3. Check the connectors, cable harnesses and the earth connection of the oil pressure transmitter.

1985 and 1986 models

1. Check fuse 22 and check that the supply to it is live.

2. Check the bulb and check that the supply to its terminals in the combined instrument is live.

3. Remove the cable from the oil pressure transmitter and earth it. If the lamp lights up, the circuit is unbroken.

4. Check the connectors, cable harnesses and the earth connection of the oil pressure transmitter.