Pinpoint Test Z: The Reversing Lamps Are On Continuously

WARNING: This page is about a different car, the 2006 Mercury Montego, 2006 Ford Freestyle, and 2006 Ford Five Hundred. However, it is still accessible from the selected car via links, so may be relevant.

Z1 CHECK THE TRANSMISSION CONTROL MODULE (TCM) PIDs
- Key in ON position.
- Enter the following diagnostic mode on the scan tool: TCM Transmission Range PIDs.
- Monitor the TCM transmission range PIDs while placing the gear selector lever through all gear selections.
- Do all the PIDs agree with the gear selections?
Yes: GO to Z2.

No: REFER to AUTOMATIC TRANSAXLE/TRANSMISSION - CVT or AUTOMATIC TRANSAXLE - 6 SPEED to continue diagnosis of the transaxle.
Z2 CHECK THE AUTO-DIMMING INTERIOR MIRROR
- Key in OFF position.
- Disconnect: Electrochromatic Interior Mirror C911.
- Key in ON position.
- Do the reversing lamps continue to illuminate?
Yes: GO to Z3.

No: INSTALL a new auto-dimming interior mirror. REFER to INSTALLATION . TEST the system for normal operation.
Z3 CHECK THE PARKING AID MODULE
- Key in OFF position.
- Disconnect: Parking Aid Module C3267.
- Key in ON position.
- Do the reversing lamps continue to illuminate?
Yes: GO to Z4.

No: GO to Z5.
Z4 CHECK CIRCUIT 1367 (WH/YE) FOR A SHORT TO VOLTAGE
- Key in OFF position.
- Disconnect: SJB C2280e.
- Key in ON position.
- Do the reversing lamps continue to illuminate?
Yes: REPAIR the circuit. TEST the system for normal operation.

No: GO to Z6.
Z5 CHECK FOR CORRECT PARKING AID MODULE OPERATION
- Key in OFF position.
- Disconnect the parking aid module connector.
- Check for:
  - corrosion
  - pushed-out pins
- Connect the parking aid module connector and make sure it seats correctly.
- Operate the system and verify the concern is still present.
- Is the concern still present?
Yes: INSTALL a new parking aid module. REFER to REMOVAL AND INSTALLATION . TEST the system for normal operation.

No: The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector.
Z6 CHECK FOR CORRECT SJB OPERATION
- Key in OFF position.
- Disconnect all the SJB connectors.
- Check for:
  - corrosion
  - pushed-out pins
- Connect all the SJB connectors and make sure they seat correctly.
- Operate the system and verify the concern is still present.
- Is the concern still present?
Yes: INSTALL a new SJB. REFER to REMOVAL AND INSTALLATION . TEST the system for normal operation.

No: The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector.