Circuit Description
WARNING: This page is about a different car, the 2003 GMC Sonoma, 2003 GMC Jimmy, 2003 Chevrolet S10 Pickup, and 2003 Chevrolet Blazer. However, it is still accessible from the selected car via links, so may be relevant.
The battery rundown protection function allows the body control module (BCM) to disable the courtesy lamps, IP compartment lamp and the underhood lamp 20 minutes after the ignition switch is turned OFF. The BCM monitors the output of the inadvertent power relay and the inadvertent power relay control circuit.