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Symptom: *EXTERIOR LAMPS FAIL TO FLASH WHEN ALARM IS TRIPPED POSSIBLE CAUSES BCM DTCS OR EXTERIOR LAMP OPERATION BODY CONTROL MODULE TEST ACTION APPLICABILITY 1 NOTE: Check for any TSBs that may apply before continuing with this test. t, read BCM DTCs. Were there any problems found? All Yes → Refer to symptom list for problems related to Exterior Lighting. Perform VTSS VERIFICATION TEST - 1A. No → Replace and program the Body Control Module in accordance with the Service Information. 393 VEHICLE THEFT/SECURITY |