Horns System Description and Operation
System Description
The horn system consists of the following components:
| • | Body control module (BCM) |
System Operation
| • | The vehicle horn is activated whenever the horn switch is depressed. |
| • | The BCM commands the horns ON under any of the following conditions: |
| - | 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 personalisation. |
Circuit Operation
The body control module (BCM) controls the horn operation, when the horn switch is pressed, it closes a switch pulling the horn signal circuit low. When the BCM detects the drop in voltage in the horn switch signal circuit, it energises the Horn relay which provides B+ voltage to the horn control circuit, sounding the horn.
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