Door/Trunk Ajar Indicator/Lamp: Description and Operation

CIRCUIT OPERATION
The door ajar warning lamp is used to alert the operator that a door is ajar. A chime tone is used along with the lamp for an audible warning.

There are four door ajar switches used. The switches for the right and left front doors are case grounded. The switches for the passenger, and drivers, rear doors provide an input to the Body Control Module (BCM) on the G76 and G77 circuit. When any of the switches are grounded (door ajar), and the vehicle is moving, the Body Control Module (BCM) sends a signal over the CCD Bus to the instrument cluster for lamp illumination.