Courtesy Lamp Output Short

COURTESY LAMP OUTPUT SHORT

For a complete wiring diagram, refer to the Wiring Information Electrical Diagrams

- When Monitored:
When output is ON.

- Set Condition:
When output is ON and device current limits.





1. INTERMITTENT CONDITION
1. Turn the ignition on.
2. With the scan tool, clear all BCM DTC's.
3. Turn the courtesy lamps on.
4. With the scan tool, read the DTC information.

Does the scan tool read: Courtesy Lamp Output Short?

Yes

- Go To 2

No

- The condition that caused the symptom is currently not present. Inspect the related wiring for a possible intermittent condition. Look for any chafed, pierced, pinched, or partially broken wires.
- Perform BODY VERIFICATION TEST. Body Verification Test

2. COURTESY LAMP DRIVER CIRCUIT SHORT
1. Turn the ignition off.
2. Disconnect the Rear view Mirror harness connector.
3. Disconnect the Body Control Module C3 harness connector.
4. Measure the resistance of the Courtesy Lamp Driver circuit.

Is the resistance below 5.0 ohms?

Yes

- Repair the Courtesy Lamp Driver circuit for a short condition.
- Perform BODY VERIFICATION TEST. Body Verification Test

No

- Go To 3

3. BODY CONTROL MODULE
1. Turn the ignition off.
2. Disconnect the Body Control Module C3 harness connector.
3. Measure the resistance of the Courtesy Lamp Driver circuit.

Is the resistance below 5.0 ohms?

Yes

- Replace the Rear view Mirror assembly.
- Perform BODY VERIFICATION TEST. Body Verification Test

No

- Replace the Body Control Module.
- Perform BODY VERIFICATION TEST. Body Verification Test