Circuit Description
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 BCM controls the operation of the fog lamps. When the park lamps are on, and the fog lamp switch is turned ON, the BCM grounds the control circuit of the fog lamp relay in order to illuminate the fog lamps.