Courtesy Lamp: Description and Operation

CIRCUIT OPERATION
The door and courtesy lamps are powered by a 10 Amp fuse located in cavity 5 of the junction block. This is the Ignition-Off Draw (IOD) fuse and HOT at all times. Circuit M1 connects from the fuse to the lamps.

Ground for the lamps is supplied on circuit M2. This circuit connects from the lamps to the illuminated entry relay located in the junction block.

The Body Control Module (BCM) controls the operation of the relay on circuit M112. When the relay is energized, the contacts in the relay CLOSE connecting circuits M2 and Z1. This completes the ground path for the lamps. The Z1 circuit terminates at the instrument panel left side cowl.