Horn: Description and Operation

Horns System Description and Operation

System Description

The horn system consists of the following components:

* HORN fuse

* Horn relay

* Horn switch

* Left Horn

* Right Horn

* Body control module (BCM)

System Operation

The vehicle horns are activated whenever the horn switch is depressed

Circuit Operation

Battery positive voltage is applied at all times to the horn relay coil and the horn relay switch. Pressing the horn switch applies ground to the horn relay control circuit or when the BCM receives a request to sound the horns, it to will provide a ground to the horn relay control circuit. When the horn relay control circuit is grounded, the horn relay is energized and battery positive voltage is applied to the horns through the horn control circuit. The horns sound as long as ground is applied to the horn relay control circuit