System Diagram

Cooling System Fan Diagrams:

Cooling System Fan Components:

Locations of components

7 Earthing point
On the radiator cross-member

8 Lighting relay (1990 models)
In the electrical distribution box in the engine compartment, relay positions A and 8.

22A Fuse holder
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 (1989 models)
In the electrical distribution box, relay position G (1990 models)

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 (AC)
In the engine compartment, behind the radiator

93 Earthing point
On the left-hand wheel housing member (1989 models)

113 Relay/time delay relay for the electrically heated rear window (1990 models)
In the electrical distribution box in the engine compartment, relay position C

156 Relay for the AC compressor
In the electrical distribution box in the engine compartment, on the left-hand wheel housing

158 Negative distribution terminal (1990 models)
In the electrical distribution box in the engine compartment, on the left-hand wheel housing

159 Distribution terminal +15 (1989 models)
In the electrical distribution box, in the engine compartment, on the left-hand wheel housing

174 Relay for daylight driving lights (CA) (1990 models)
In the electrical distribution box in the engine compartment, relay position F

396 Radiator fan relay (1990 models)
In the electrical distribution box, relay position G

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 about 92°C (198°F), 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 when 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 switched 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 SE, FE, EU and GB markets
On these markets, the wiring for the AC is not fitted as standard to cars with I8 and T8 engines. An AC cable harness must be fitted when the AC is installed.

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.