For 1990-2009 cars

Important: Review the system operations in order to familiarize yourself with the system functions. Refer to:

• | Headlights/Daytime Running Lights (DRL) Circuit Description

• | Exterior Lights Circuit Description

• | Backup Lamp Circuit Description

• | Interior Lights Circuit Description

• | Interior Lights Dimming Circuit Description

### Visual/Physical Inspection

• | Inspect for aftermarket devices which could affect the operation of the Lighting Systems. 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 Inoperative

• | Backup Lamps Always On

• | Backup Lamp Inoperative - One Lamp

• | Battery Rundown Protection Inoperative

• | Dome Lamps Inoperative

• | Dome Lamps Inoperative

• | Headlamps Flash to Pass Inoperative

• | Headlamps Inoperative - High Beams

• | Headlamps Inoperative - Low Beams

• | Stop Lamps Always On

• | Stop Lamps Inoperative - One

• | Tail Lamp Inoperative - Left Rear

• | Park Lamp Inoperative - Right Side Front

• | Park Lamp Inoperative - Left Side Front

• | Side Marker Lamps Inoperative

• | Side Marker Lamps Inoperative

• | License Lamps Inoperative

• | License and Tail Lamps Inoperative

• | Inside Rearview Mirror Lamp Inoperative

• | Inside Rearview Mirror Lamp Inoperative

• | Dome Lamps Always On

• | Stop Lamps Inoperative

• | Tail Lamps Inoperative - Right Rear

• | Headlamps Inoperative - One Lamp

• | Twilight Sentinel Inoperative

• | High Beam Indicator Inoperative

• | Headlamps On in Daylight Conditions

• | Headlamps Inoperative in Low Light Conditions

• | Hazard Lamps Inoperative

• | Exterior Lights System Check

• | Instrument Panel Lamps Always On

• | Instrument Panel Lamps Do Not Dim

• | Headlamps Inoperative in Low Light Conditions

• | Turn Signal Lamp Inoperative - Left Side Front

• | Turn Signal Lamp Inoperative - Right Side Front

• | Instrument Panel Lamps Inoperative

• | Turn Signal Lamps Inoperative - Hazard Lamps Operate

• | Turn Signal Lamps Inoperative - Left Side Rear

• | Turn Signal Lamp Inoperative - Right Side Rear

• | Turn Signal Lamps and Indicators Inoperative - One Side

• | Turn Signal Lamps and Indicators Inoperative - One Side

• | Turn Signal and Hazard Lamps Inoperative

• | Turn Signal Indicators Inoperative - Left Side

• | Turn Signal Indicators Inoperative - Right Side

• | Daytime Running Lamps (DRL) Headlamps Always On

• | Daytime Running Lamps (DRL) Headlamps Inoperative

• | Daytime Running Lamps (DRL) Headlamps Inoperative

• | Park Lamps Inoperative