System Description
The horn system consists of the following components:
System Operation
The vehicle horn system is activated under the following conditions:
| • | The horn switch is depressed. |
| • | The body control module (BCM) commands the horns on. The BCM commands
the horns on under any of the following conditions: |
| • | When the content theft deterrent system detects a vehicle intrusion. |
| • | When the panic button is depressed on the remote control door
lock transmitter. |
| • | 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. The
notification feature may be enabled or disabled through personalization. |
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. The BCM may also apply 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.
