PINPOINT TEST AA : All the Reversing Lamps Are Inoperative
WARNING: This page is about a different car, the 2017 Lincoln Navigator and 2017 Ford Expedition. However, it is still accessible from the selected car via links, so may be relevant.
- AA1 CHECK THE STOPLAMP OPERATION
- Ignition ON.
- Apply the brake pedal while observing the stoplamps.
Do the stoplamps illuminate?
Yes GO to AA2 No REFER to Stoplamps . - AA2 CHECK THE PCM TRANSMISSION RANGE PID
- Using a diagnostic scan tool, view the PCM PIDs.
- Monitor the PCM Transmission Range (TR) PID while placing vehicle in REVERSE.
Does the PID indicate REVERSE?
Yes GO to AA3 No REFER to Automatic Transmission External Controls to diagnose the transmission range input. - AA3 BYPASS THE BCMNOTE: If the fuse in the jumper wire fails, refer to the OEM Electrical Wiring Diagram Introduction to identify the possible causes of the circuit short.
- Ignition OFF.
- Disconnect: BCM C2280D .
- Connect a fused jumper wire:
Positive Lead Measurement / Action Negative Lead C2280D-13 Positive Battery Terminal
Do the reversing lamps illuminate?
Yes REMOVE the jumper wire. GO to AA4 No REMOVE the jumper wire. REPAIR the BCM reverse lamp output circuit for an open. - AA4 CHECK FOR CORRECT BCM OPERATION
- Disconnect and inspect all BCM connectors.
- Repair:
- corrosion (install new connector or terminals - clean module pins)
- damaged or bent pins - install new terminals/pins
- pushed-out pins - install new pins as necessary
- Reconnect the BCM connectors. Make sure they seat and latch correctly.
- Operate the system and determine if the concern is still present.
Is the concern still present?
Yes CHECK OASIS for any applicable TSBs. If a TSB exists for this concern, DISCONTINUE this test and FOLLOW TSB instructions. If no TSBs address this concern, BCM Hardware Testing . No The system is operating correctly at this time. The concern may have been caused by module connections. ADDRESS the root cause of any connector or pin issues.