Horn: Description and Operation

The horn system includes the following:
^ Power distribution box fuse 18 (15A).
^ Horn relay.
^ Horn.
^ Air bag sliding contact.
^ Steering wheel control switch harness.
^ Steering wheel pad horn switch (part of driver side air bag module).

The horn system is designed to sound the horn when the steering wheel pad horn switch is depressed. The horn relay is supplied voltage at all times through power distribution box fuse 18 (15A). Depressing 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 [1][2]Lighting Control Module (LCM). The LCM grounds the coil side of the horn relay during anti-theft operation.