System Description
The horn system consists of the following components:
| • | Horn switch (Part of the multifunction turn signal lever) |
| • | Body control module (BCM) |
System Operation
The body control module (BCM) commands the horns on. The BCM commands the horns on under any of the following conditions:
| • | When the horn switch is depressed |
| • | When the keyless entry system is used to lock the vehicle, a horn chirp may sound to notify the driver that the vehicle has been locked. |
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 switch signal circuit. The BCM applies ground to the horn relay control circuit as described above. 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.
