Backup Lamp Output Open
NOTE:
After making any repairs, perform BODY VERIFICATION TEST under VERIFICATION TESTS.
- Turn the ignition on. With the DRBIII®, clear all BCM, IPM DTC's. Actuate the Backup Lamps. With the DRBIII®, read the DTC information. If the DRBIII® reads: Backup Lamp Output Open, go to the next step. If the DRBIII® does not read: Backup Lamp Output Open, 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.
- Turn the ignition off. Disconnect the inoperative rear tail lamp harness connector. See Fig 1. Using a 12-volt test light connected to 12-volts, check the ground circuit. If the test light illuminates brightly, go to the next step. If the test light does not illuminate brightly, repair the ground circuit.
- Turn the ignition off. Disconnect the inoperative rear tail lamp harness connector. See Fig 1. Turn the ignition on. Engage the transmission to reverse. Using a 12-volt test light connected to ground, check the Backup Lamps Output circuit. If the test light illuminates brightly, replace the applicable Backup Lamp. If the test light does not illuminate brightly, go to the next step.
- Turn the ignition off. Disconnect the Body Control Module harness connector. See Figure. Disconnect the inoperative rear tail lamp harness connector. See Fig 1. Measure the resistance of the Backup Lamp Driver Circuit. If the resistance is above 5 ohms, repair the Backup Lamp Driver Circuit for an open condition. If the resistance is below 5 ohms, replace the Body Control Module. See BODY CONTROL MODULE under REMOVAL & INSTALLATION.