October 30: LEMON manuals on a temporary server, it is slow and having issues, download the manuals you need! Later in November we will switch back to the fast server.

Lighting Trouble Code Diagnosis

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.