Circuit Description
WARNING: This page does not describe the selected car, but rather 16 other vehicles, including the 2001 Pontiac Montana, 2001 Oldsmobile Silhouette, 2001 Oldsmobile Bravada, 2001 GMC Sonoma, and 2001 GMC Savana Special. However, it is still accessible from the selected car via links, so may be relevant.
DTC sets when Body Control Module (BCM) detects a short to power or a short to ground in Black wire between BCM and horn relay, or between horn switch and horn relay.