Coolant Temperature Warning Buzzer

Coolant Temperature Warning Buzzer Diagrams:

Coolant Temperature Warning Buzzer Components:

Locations of components

7 Earthing point
On the radiator cross-member (I8, T8) (1989 models)

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

61 Windscreen wiper stalk switch
On the right-hand side of the steering Column

129 Buzzer for coolant temperature
Under the fascia, to the left of the steering column, behind the knee shield

130 Coolant temperature warning switch
In the engine compartment, on the radiator hose

152B 29-pole red connector
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.

201 Earthing point
On the engine (116, T16)

269 Two-pole connector
Under the fascia, behind the knee shield

Operation
Cars for the Middle East and Far East markets are equipped with a coolant temperature warning buzzer.

When the ignition switch is in the drive position, buzzer 129 will be supplied from fuse 5, via red 29-pole connector 152B. If the coolant temperature should exceed about +120 °C (250 °F), coolant temperature warning switch 130 will close and the buzzer will sound. The switch will open again at about +115 °C (240 °F).

Fault-tracing hints
The buzzer will be operative when the ignition switch is in the drive position.

1. Check fuse 5 and check that the supply to it is live.
2. Check that the supply to the buzzer is live. The buzzer should sound when the cable to the temperature switch is earthed.
3. Check the temperature switch.
4. Check the connectors, cable harnesses and earth connections.