Lighting Trouble Code Diagnosis
WARNING: This page is about a different car, the 1989 Cadillac Allante. However, it is still accessible from the selected car via links, so may be relevant.
Lighting codes (L-Codes) are set by the BCM when a fault is detected with the distributed lighting system. To effectively determine a fault in the lighting system, Chart A-1 must be followed or misdiagnosis may result.. See A CHARTS (LIGHTING) in 1989 SELF-DIAGNOSTICS -- ALLANTE article in ENGINE PERFORMANCE.