Lights On Chime
The BCM sends a class 2 message to the radio or to the chime module to activate an audible warning as a reminder that the headlamps are ON when the door is open and the ignition switch is in the OFF position. The lights ON warning sounds at the fast rate of 200 pulses per minute until the headlamp switch is turned OFF.
Turning the park lamps OFF and turning it back ON with the driver door open will turn the chime OFF.