Fuel Gauge

Fuel Gauge And Warning Lamp Diagrams:

Fuel Gauge And Warning Lamp Components:

Locations of components

3 Earthing point
In the facia

9 Earthing point
In the luggage compartment

20 Ignition switch
Between the front seats, at the gear lever

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

46 Fuel level transmitter
In the fuel tank - the terminals are accessible from the luggage compartment

47A Fuel level gauge
In the combined instrument

47B Fuel reserve warning lamp
In the combined instrument

57 3-pole connector (1985 and 1986 models)
Under the spare-wheel well, in the luggage compartment

58 12-pole connector
To the left of the steering column, under the knee shield below the facia

59 2-pole connector
In the luggage compartment, under the spare-wheel well

152A 29-pole white connector (1984 models)
152B 29-pole red connector (1985 and 1986 models)
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 fuel gauge and the warning lamp for the fuel reserve keep the driver informed of the fuel level in the tank. The wiring on 1984 models differs from that of 1985 and 1986 models.

1984 models
When the ignition switch is in the drive position, a positive supply (+15) is taken via the 29-pole white connector 152A to:

Fuel level gauge 47D in the combined instrument and through fuel level transmitter 46 in the fuel tank to earth, and

Fuel reserve warning lamp 47B and through the fuel level transmitter in the fuel tank to earth.

Fuel level transmitter 46 adjusts the voltage so that the fuel gauge reading will correspond to the level sensed by the transmitter float in the tank.

When the fuel content of the tank has dropped to about 7 dm3 (liters) or less, the fuel reserve warning lamp will be earthed through the transmitter and the lamp will light up.

1985 and 1986 models
The operation is the same as on 1984 models, but the supply is taken via fuse 22. In addition, fuel level transmitter 46 is connected by means of a 3-pole connector (57).

Fault-tracing hints
The fuel gauge and the warning lamp for the fuel reserve 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. Check that the terminals of the fuel gauge and the fuel level transmitter are live.

3. Check the connectors, cable harnesses and the earth connection of the fuel level 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. Check that the terminals of the fuel gauge and the fuel level transmitter are live.

4. Check the connectors, cable harnesses and the earth connection of the fuel level transmitter.