Headlamps On Warning
WARNING: This page is about a different car, the 2003 Pontiac Aztek and 2003 Buick Rendezvous. However, it is still accessible from the selected car via links, so may be relevant.
The radio activates the headlamps on warning as requested by the body control module (BCM).
The BCM sends a class 2 message to the radio indicating the chime frequency (fast rate) and duration (continuous). The headlamps on warning sounds when the following occurs:
- The ignition is OFF.
- The BCM determines that the driver's door is open (signal is low).
- The BCM determines that the headlamp switch is in the park or head position.