Horns Always On
WARNING: This page is about a different car, the 2000 Chevrolet Corvette. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
Check horn system operation prior to performing test procedure and after any repairs are completed. See HORN SYSTEM CHECK
under TROUBLE SHOOTING.
- If system check was performed, go to next step. If system check was not performed, go to HORN SYSTEM CHECK under TROUBLE SHOOTING.
- Disconnect Body Control Module (BCM) connector C1. Turn ignition on. If horns sound, go to next step. If horns do not sound, go to step 5 .
- Remove horn relay from underhood electrical center. Check for continuity between ground and BCM connector C1, terminal B10 (Black wire). If continuity exists, go to next step. If continuity does not exist, go to step 6 .
- Remove inflator module from steering wheel. See AIR BAG RESTRAINT SYSTEMS article. Disconnect horn brush slip sing connector from inside steering wheel. Check continuity between ground and BCM harness connector C1 terminal B10 (Black wire). If continuity exists, go to step 10 . If continuity does not exist, go to step 9 .
- Turn ignition off. Reconnect BCM connector C1. Turn ignition on. If horns are pulsating on and off, simulating theft deterrent mode, see HORN SYSTEM CHECK under TROUBLE SHOOTING. If horns are not pulsating on and off, go to step 11 .
- With horn relay still removed, turn ignition on. If horns sound continuously, go to next step. If horns are not sounding, go to step 8 .
- Repair short to battery voltage in Dark Green wire between underhood electrical center and horns.
- Replace horn relay.
- Replace horn switch assembly.
- Repair short to ground in Black wire between BCM and horn relay.
- Replace BCM. See BODY CONTROL MODULES - CORVETTE article.