Headlights Fail To Flash With Alarm Tripped

Turn on low beam headlights. If low beam headlights operate correctly, replace Body Control Module (BCM). See BODY CONTROL MODULE  under REMOVAL & INSTALLATION. Perform VEHICLE THEFT SECURITY SYSTEM VERIFICATION TEST  under VERIFICATION TESTS. If low beam headlights do not function correctly, check for related BCM DTCs. Repair as needed. If no related DTCs are present, diagnose headlight system. See HEADLIGHT SYSTEMS article. Perform VEHICLE THEFT SECURITY SYSTEM VERIFICATION TEST  under VERIFICATION TESTS.