Preliminary Horn System Checks

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.

Before performing any tests, check the following items to eliminate common problems:

On vehicles equipped with Content Theft Deterrent (CTD), perform horns diagnostic system check before using symptom tables to verify that there are not DTCs present. See HORNS DIAGNOSTIC SYSTEM CHECK under SELF-DIAGNOSTIC SYSTEM.
Check all fuses.
Check for damaged, loose or corroded connections.
Check for damaged wiring harness.
If horn buzzes or has a harsh tone, inspect for debris in joint where horn fastens to vehicle and torque horn mounting hardware. See TORQUE SPECIFICATIONS .
Check for proper installation of aftermarket electronic equipment which may affect circuits. If a fuse is blown, repair circuits as necessary. Correct any obvious problems before continuing testing. If problem still exists, perform self-diagnostics. See SELF-DIAGNOSTIC SYSTEM .