System Diagram

Cooling Fan System Diagrams:

Cooling Fan System Components:

Locations of components

7 Earthing point
On the radiator cross-member

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

26 Time delay relay for the radiator fan
In the engine compartment, at the front of the left-hand wheel housing member

37 Radiator fan motor
At the front of the engine compartment

39 Temperature switch for radiator fan
On the left-hand side of the radiator

59 2-pole connector
At the radiator fan motor

60 Single-pole connector (1985/1986 models with AC)
In the engine compartment, behind the radiator

159 Distribution terminal +15
In the electrical distribution box in the engine compartment, on the left-hand wheel housing

Operation
The supply is taken from fuse 25 to temperature switch 39, regardless of the ignition switch position.

When the engine coolant temperature has reached around 92 °C, the temperature switch will close and radiator fan motor 37 will start.

Cars with air conditioning (AC) are equipped with a crimped branch connection, since the fan is also controlled by the AC unit.

Time delay relay
Cars for "hot-weather markets" are also equipped with a time delay relay, which limits the time the radiator fan will run after the engine has been switched off.

Relay 26 is always energized with the engine is running, i.e. when the ignition switch is in the drive position. The fan is controlled by switch 39.

When the engine is shut off, the +15 supply to the relay coil will be interrupted. After about 10 minutes, the relay will trip the supply to the fan motor, even if temperature switch 39 is still closed.

Cars for the Australian market are equipped with a jumper (598A yellow/white) across the relay contacts. The relay will not operate unless the jumper is cut.

Fault-tracing hints

1. Check fuse 25 and check that the supply to it is live.

2. Check that the supply to temperature switch 39 is live.

3. Check the radiator fan by connecting a jumper across the temperature switch.

4. Run the engine until it reaches normal operating temperature and check the performance of the temperature switch.

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

If the car is equipped with a time delay relay, check the relay and fuse 22.