Left Rear Turn Signal Output Short-BCM

LEFT REAR TURN SIGNAL OUTPUT SHORT-BCM

For a complete wiring diagram Consult 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 Short?

Yes

- Go To2

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. (L63) LEFT REAR TURN SIGNAL DRIVER CIRCUIT SHORT TO GROUND
Turn the ignition off.
Disconnect the Left Rear Turn Signal Lamp connector.
Disconnect the BCM C3 harness connector.
Measure the resistance between the (L63) Left Rear Turn Signal Driver circuit and ground.
Is the resistance below 100.0 ohms?

Yes

- Repair the (L63) Left Rear Turn Signal Driver circuit for a short to ground.
- Perform BODY VERIFICATION TEST - VER 1.Body Verification Test

No

- Go To3

3. TURN SIGNAL LAMP
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-volt test light connected to ground, check the (L63) Left Rear Turn Signal Driver circuit.
Does the test light illuminate brightly?

Yes

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

No

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