Left Rear Turn Signal Output Open-BCM

LEFT REAR TURN SIGNAL OUTPUT OPEN-BCM

For a complete wiring diagram refer to Diagrams/Electrical.





Diagnostic Test

1. INTERMITTENT CONDITION

Turn the ignition on.

With the scan tool, clear all BCM DTC's.

Actuate the Turn Signals.

With the scan tool, read the DTC information.

Does the scan tool read: Left Rear Turn Signal Output Open?

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 - VER 1. Body Verification Test

2. GROUND CIRCUIT OPEN

Turn the ignition off.

Disconnect the Left Rear Turn Signal harness connector.

Using a 12-volt test light connected to 12-volts, check the ground circuit.

Does the test light illuminate brightly?

Yes

- Go To 3

No

- Repair the Ground Circuit.
- Perform BODY VERIFICATION TEST - VER 1. Body Verification Test

3. TURN SIGNAL LAMP OPEN

Turn the ignition off.

Disconnect the Left Rear Turn Signal Lamp connector.

Turn the ignition on.

Turn the Left Turn Signal on.

Using a 12-volttest light connected to ground, check the (L63) Left Rear Turn Signal Output circuit.

Does the test light illuminate brightly?

Yes

- Replace the Turn Signal Lamp.
- Perform BODY VERIFICATION TEST - VER 1. Body Verification Test

No

- Go To 4

4. (L63) LEFT REAR TURN SIGNAL LAMP DRIVER CIRCUIT OPEN

Turn the ignition off.

Disconnect the Body Control Module C3 connector.

Disconnect the left rear tail lamp connector.

Measure the resistance of the (L63) Left Rear Turn Signal Driver Circuit to ground.

Is the resistance above 5.0 ohms?

Yes

- Repair the (L63) Left Rear Turn Signal Lamp Driver Circuit for an open condition.
- Perform BODY VERIFICATION TEST - VER 1. Body Verification Test

No

- Replace the Body Control Module.
- Perform BODY VERIFICATION TEST - VER 1. Body Verification Test