Lighting Trouble Code Diagnosis: Notes
WARNING: This page is about a different car, the 1988 Cadillac Allante and 1987 Cadillac Allante. However, it is still accessible from the selected car via links, so may be relevant.
Lighting codes are set by the BCM when a fault is detected in the distributed lighting system. Use Lighting Chart A-1 to effectively determine a fault in the lighting system and to avoid a wrong diagnosis of the fault. See SELF-DIAGNOSTICS article in ENGINE PERFORMANCE.