Headlamps On Warning

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.