For 1990-2009 cars

Important: The following steps must be completed before using the symptom tables.

1. Perform 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) is operating properly.

2. Review the system operation in order to familiarize yourself with the system functions. Refer to Lighting System Description .

### Visual/Physical Inspection

• | Inspect for aftermarket devices which could affect the operation of the Lighting System. Refer to Checking Aftermarket Accessories in Wiring Systems.

• | 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 Conditions and Poor Connections in Wiring Systems.

### 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

• | Battery Rundown Protection Inoperative

• | Courtesy Lamps Always On

• | Courtesy Lamps Inoperative

• | Courtesy Lamps Inoperative with Instrument Panel Dimmer Switch

• | Courtesy Lamps Inoperative with Doors Open

• | Courtesy/Reading Lamps Always On

• | Courtesy/Reading Lamps Inoperative

• | Daytime Running Lamps (DRL) Headlamps Inoperative

• | Fog Lamps Always On

• | Rear Fog Lamps Always On

• | Fog Lamps Inoperative

• | Rear Fog Lamps Inoperative

• | Fog Lamp Indicator Inoperative

• | Fog Lamp Indicator Inoperative

• | Fog Lamp Indicator Always On

• | Rear Fog Lamp Indicator Always On

• | Hazard Lamps Inoperative

• | Headlamp Low or High Beams Always On

• | Headlamps Inoperative - Low Beams

• | Headlamps Inoperative - High Beams

• | Headlamps Flash to Pass Inoperative

• | Headlamps Inoperative - One Lamp

• | Low and High Beams Headlamps Inoperative

• | High Beam Indicator Always On

• | High Beam Indicator Inoperative

• | Instrument Panel Compartment Lamp Inoperative

• | Instrument Panel Compartment Lamp Always On

• | Vanity Mirror Lamp Inoperative

• | Instrument Panel Lamps Do Not Dim

• | Instrument Panel Lamps Inoperative - One

• | Instrument Panel Lamps Erratic with Dimmer Switch

• | Instrument Panel Lamps or Vacuum Fluorescent Displays Inoperative

• | Park Lamps Always On

• | Park Lamps Inoperative

• | Personalization Mode Inoperative

• | Roof Rail Courtesy/Reading Lamp Always On

• | Roof Rail Courtesy/Reading Lamp Inoperative

• | Stop Lamps Inoperative

• | Stop Lamps Always On

• | Trailer Towing Indicator Always On

• | Trailer Towing Indicator Inoperative

• | Turn Signal Lamps Inoperative

• | Turn Signal Lamps Inoperative - Left or Right Side

• | Turn Lamps Always On

• | Turn Signal Indicators Inoperative

• | Vacuum Fluorescent Displays Do Not Change Intensity - All

• | Vacuum Fluorescent Display Do Not Dim with Park Lamps On