General
Two horns are located in the left and right hand sides of the front panel, forward of the radiator. The horns are operated by pushing either of two buttons located on the upper spokes of the steering wheel. One horn emits a low tone, the other a high tone. Each horn produces a sound of between 93 and 112 db at a distance of 7 m (23ft).
Each horn switch is connected to the horn circuit via a rotary coupler in the steering column. The horn circuit is on a permanent feed from the battery and operates independently of the ignition circuits.
Horns Circuit Supply
A feed from the battery positive terminal is connected by an R wire to the engine compartment fusebox. The feed passes through fuse 16 and is connected to the contacts and coil of the horn relay. In this condition the horn relay receives a permanent feed from the battery.
Horns Operation
When one of the horn switches is pushed, an earth path is completed from the horn relay coil on a PO wire from the engine compartment fusebox, via header C0291 LHD/C0286 RHD, the rotary coupler and horn switches, to earth via fixings E110.
The completed earth path energizes the horn relay coil, closing the relay contacts. The feed from fuse 16 passes through the relay contacts to the LH and RH horns on PG wires causing the horns to sound.
The LH horn is connected to earth point C0564-1 on a B wire. The RH horn is connected to earth header C0018 on a B wire.