Conditions for Setting the DTC

WARNING: This page is about a different car, the 2006 Pontiac Montana SV6, 2006 Chevrolet Uplander, and 2006 Buick Terraza. However, it is still accessible from the selected car via links, so may be relevant.

When the BCM does not activate the high beam relay and the headlamp high beam relay control circuit is shorted to ground
When the BCM activates the high beam relay and the headlamp high beam relay control circuit is shorted to voltage or open