Horn Fails To Sound When Alarm Is Tripped

*HORN FAILS TO SOUND WHEN ALARM IS TRIPPED

For a complete wiring diagram Consult Diagrams/Electrical





Diagnostic Test

1. HORN RELAY CONTROL CIRCUIT DTC ACTIVE

NOTE: Check for any TSBs that may apply before continuing with this test.

Turn the ignition on.
With the scan tool, read BCM DTC's.
Does the scan tool display a HORN RELAY CONTROL CIRCUIT DTC active?

Yes

- Diagnose and repair the DTC(s).
- Perform VTSS VERIFICATION TEST - 1A. Vehicle Theft Security Verification Tests

No

- Go To2

2. HORN CIRCUIT DIAGNOSTICS
Does the horn operate from the horn button?

Yes

- Replace and program the Body Control Module.
- Perform BODY VERIFICATION TEST - VER 1. Body Verification Test

No

- Refer to symptom Horns Inoperative under Horn.
- Perform VTSS VERIFICATION TEST - 1A. Vehicle Theft Security Verification Tests