Backup Lamp Output Open-BCM

BACKUP LAMP OUTPUT OPEN-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 Backup Lamps.
With the scan tool, read the DTC information.
Does the scan tool read: Backup Lamp Output Open?

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 terminal push out or any chafed, pierced, pinched, or partially broken wires.
- Perform BODY VERIFICATION TEST - VER 1.Body Verification Test

2. GROUND CIRCUIT




Turn the ignition off
Disconnect the inoperative rear tail lamp harness connector.
Using a 12-volt test light connected to 12-volts, check the ground circuit.
Does the test light illuminate brightly?

Yes

- Go To3

No

- Repair the applicable (Z362), (Z363) Ground Circuit.
- Perform BODY VERIFICATION TEST - VER 1.Body Verification Test

3. BACKUP LAMP OPEN
Turn the ignition off.
Disconnect the inoperative rear tail lamp harness connector.
Turn the ignition on.
Engage the transmission to reverse.
Using a 12-volt test light connected to ground, check the (L1) Backup Lamps Output circuit.
Does the test light illuminate brightly?

Yes

- Replace the applicable Backup Lamp.
- Perform BODY VERIFICATION TEST - VER 1.Body Verification Test

No

- Go To4

4. (L1) BACKUP LAMP DRIVER CIRCUIT OPEN




Turn the ignition off.
Disconnect the Body Control Module C2 harness connector.
Disconnect the inoperative rear tail lamp harness connector.
Measure the resistance of the (L1) Backup Lamp Driver Circuit.
Is the resistance above 5.0 ohms?

Yes

- Repair the (L1) Backup 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