Electrical Diagrams

Horn Diagrams:

Horn Components:

Locations of components

1 Battery
On the right-hand side of the engine compartment

7 Earthing point
On the radiator cross-member

20 Ignition switch
On the centre console between the front seats

21 Ignition switch relay
In the electrical distribution box, in the engine compartment, relay position E

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

40 Horn
Two on the right-hand side, behind the headlamp

41 Horn switch
Behind the steering wheel hub pad

59 2-pole connector
One at each horn

68 Horn relay
In the electrical distribution box in the engine compartment, relay position K

75 Distribution block
In the engine compartment, on the right-hand side

152A 29-pole white connector
152B 29-pole red 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.

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

211 Earthing point
On the gearbox

352 Slip ring switch
At the steering column

Operation
The horn system includes two tuned loud-tone horns, one of them high-pitched and the other 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 and slip ring switch 352 to the horn switches on the steering wheel.

When one of the horn switches is closed, the relay will be energized and horn 40 will be supplied via fuse 26 and the relay contacts.

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.