Horn: Description and Operation

The horns are operated by the Body Processor Module (BPM), as described below.

The switch, located on the steering wheel pad, signals the BPM to sound the horn. The BPM horn-output connection responds by providing an earth path for the horn relay coil. The relay contacts are subsequently closed and the horns sound.

The horn operating relay is located in the under bonnet fusebox at the left hand side of the engine compartment.