Electrical Diagrams

Horn Diagrams:

Horn 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

40 Horn
1984 models: two on the left-hand side, behind the head lamp.
On Turbo models: one horn on each side.
1985 and 1986 models: two on the right-hand side, behind the headlamp.

41 Horn switch
Behind the steering wheel hub pad

68 Horn relay
In the electrical distribution box in the engine compartment, on the left-hand wheel housing

152B 29-pole red connector
In the electrical distribution box in the engine compartment, on the left-hand wheel housing. The connector is accessible from the interior of the car

Operation
The horn system includes two matched, loud-tone horns. The tone of one of the horns is high-pitched and the other is low-pitched.

When the ignition switch is in the drive position, a positive voltage (+54) is taken via the actuating coil in horn relay 68 to the horn switch on the steering wheel. (The supply is obtained from the ignition relay. See the section entitled Positive supply, Distribution terminal +54.)

When the horn switch is closed, the relay is energized and horn 40 is supplied via fuse 26 and the relay contacts.

On 1984 Turbo models, one of the horns is located at the front on the left-hand side, and the other on the right-hand side. On all other models, the two horns are mounted together in the same location.

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

1. Check fuse 26 and check that the supply to it is live.

2. Check the relay by earthing relay terminal 85. The horn should then sound.

3. Check the cable harnesses and earth connections.