Left Stop Lamp Inoperative

POSSIBLE CAUSES
- Fused B(+) circuit open
- Ground circuit open
- Left tail/stop lamp bulb

Diagnostic Test

1. INSPECT THE LEFT TAIL/STOP LAMP BULB

NOTE: If all stop lamps are inoperative, inspect Fuse 2 located in the

Illumination Control Module/IP Fuse Block. If the fuse is open, repair the cause of the open fuse before continuing.
Turn the ignition off.
Remove the Left Tail/Stop Lamp bulb and inspect for an open filament.

Q: Is the Bulb filament open?

YES: Replace the Left Tail/Stop Lamp bulb. Perform BODY VERIFICATION TEST. Body Verification Test
NO: Go to 2

2. MEASURE FUSED B(+) CIRCUIT RESISTANCE

Disconnect the Left Rear Lamp Assembly harness connector.
Disconnect the Illumination Control Module harness connector.

NOTE: Check connectors - Clean/repair as necessary.Measure the resistance between the Left Rear Lamp Assembly harness connector and the Illumination Control Module harness connector.

Q: Is the resistance below 5.0 ohms?

YES: Go to 3
NO: Repair the Fused B(+) circuit for an open between the Left Rear Lamp Assembly and the Illumination Control Module. Perform BODY VERIFICATION TEST. Body Verification Test

3. MEASURE LEFT TAIL/STOP LAMP VOLTAGE

Connect the Illumination Control Module harness connector
Depress the brake pedal.
Measure the voltage between the Left Rear Lamp Assembly harness connector cavity 4 and ground.

Q: Is the voltage above 10 volts?

YES: Go to 4
NO: Replace the Illumination Control Module. Perform BODY VERIFICATION TEST. Body Verification Test

4. MEASURE LEFT TAIL/STOP LAMP GROUND CIRCUIT RESISTANCE

Release the brake pedal.
Measure the resistance between the Left Rear Lamp Assembly harness
connector and ground.

Q: Is the resistance below 5.0 ohms?

YES: Ensure that the Left Tail/Stop Lamp bulb is installed properly and replace the bulb socket if necessary. Perform BODY VERIFICATION TEST. Body Verification Test
NO: Repair the Left Rear Lamp Assembly ground circuit fro an open. Perform BODY VERIFICATION TEST. Body Verification Test