Principles of Operation

PRINCIPLES OF OPERATION

The horn system is designed to sound the horn when the steering wheel pad horn switch is pressed. The horn relay is supplied voltage at all times through the battery junction box (BJB) fuse 10 (20A). Pressing the steering wheel pad horn switch provides a ground circuit to the coil side of the horn relay. In turn, the switch side of the horn relay is closed, allowing voltage to be applied to the horn.

The coil side of the horn relay is also controlled by the lighting control module (LCM). The LCM grounds the coil side of the horn relay during anti-theft operation.