A Symptoms - Lighting Systems

IMPORTANT: The following steps must be completed before using the symptom tables.
1. Perform the A Diagnostic System Check - Lighting Systems before using the Symptom Tables in order to verify that all of the following are true:
^ There are no DTCs set.
^ The control module(s) can communicate via the serial data link.
2. Review the system operation in order to familiarize yourself with the system functions. Refer to Lighting System Operation.

VISUAL/PHYSICAL INSPECTION
^ Inspect for aftermarket devices which could affect the operation of the lighting system. Refer to Checking Aftermarket Accessories in Diagrams.
^ Inspect the easily accessible or visible system components for obvious damage or conditions which could cause the symptom.

INTERMITTENT
Faulty electrical connections or wiring may be the cause of intermittent conditions. Refer to Testing for Intermittent and Poor Connections in Diagrams.

SYMPTOM LIST
Refer to a symptom diagnostic procedure from the following list in order to diagnose the symptom:
^ Backup Lamps Always On
^ Backup Lamps Inoperative
^ Backup Lamp Inoperative - One Lamp
^ Cornering Lamps Inoperative
^ Courtesy Lamps Inoperative
^ Courtesy or Dome Lamps Always On
^ Courtesy Lamps Inoperative with Doors Open
^ Daytime Running Lamps (DRL) Headlamps Always On
^ Daytime Running Lamps (DRL) Head/amps Inoperative
^ Fog Lamp Indicator Always On - Front
^ Fog Lamp Indicator Inoperative - Front
^ Fog Lamps Always On
^ Fog Lamps Inoperative - All
^ Hazard Lamps Always On
^ Hazard Lamps Inoperative
^ Head/amps Inoperative - Low Beams
^ Head/amps Inop - Low Beams W/Windshield Wipers On
^ Head/amps - Low Beams On with Headlamp Switch Off
^ Head/amps Inoperative - High Beams
^ Head/amps Inoperative - Flash to Pass
^ Head/amps Inoperative - One Lamp
^ Head/amps Inoperative - Low and High Beams
^ High Beam Indicator A/ways On
^ High Beam Indicator Inoperative
^ High Beam On with Head/amp Switch Off
^ IP Compartment Lamp Inoperative
^ Vanity Mirror Lamp(s) Inoperative
^ Underhood Lamp Inoperative
^ Rear Compartment Lamp(s) Inoperative
^ Incandescent Lamps Inoperative
^ Door Lamp Inoperative - LF
^ Door Lamp Inoperative - RF
^ Door Lamp Inoperative - LR
^ Door Lamp Inoperative - RR
^ License Lamps Inoperative
^ LIGHTS ON Indicator Always On
^ LIGHTS ON Indicator Inoperative
^ Park Lamps Inoperative
^ Park and Tail Lamps A/ways On
^ Position Lamps Inoperative
^ Position Lamps Inoperative - Left
^ Position Lamps Inoperative - Right
^ Stop Lamps Inoperative
^ Stop Lamps Always On
^ Turn Signal Lamps mop - Hazard Lamps Operate
^ Turn Signal and Hazard Lamps Inoperative
^ Turn Signal Lamps and Indicators mop - One Side
^ Turn Signal Indicator Always On - Left
^ Turn Signal Indicator Always On - Right
^ Turn Signal Indicators Inoperative - Left
^ Turn Signal Indicators Inoperative - Right
^ Turn Signal Lamps Always On - One Side
^ Twilight Sentinel Inoperative
^ VF Display Inoperative - Heater and A/C Control