Pinpoint Test D : The Trailer Parking Lamps Are Inoperative Or Always On: Notes
WARNING: This page is about a different car, the 2018 Ford F-550 Super Duty, 2018 Ford F-450 Super Duty, 2018 Ford F-350 Super Duty, and 2018 Ford F-250 Super Duty. However, it is still accessible from the selected car via links, so may be relevant.
Refer to Trailer/Camper Adapter for schematic and connector information.
Normal Operation and Fault Conditions
REFER to: Exterior Lighting - Overview .
REFER to: Exterior Lighting - System Operation and Component Description .
DTC Fault Trigger Conditions
| DTC | Description | Fault Trigger Conditions |
|---|---|---|
| B1449:12 | Trailer Tow Park/Tail Lamp Output: Circuit Short To Battery | A continuous memory and on-demand DTC that sets when the BCM detects a short to voltage from the trailer parking lamps relay enable circuit. |
| B1449:14 | Trailer Tow Park/Tail Lamp Output: Circuit Short To Ground or Open | A continuous memory and on-demand DTC that sets when the BCM detects an open short to ground from the trailer parking lamps relay enable circuit. |
Possible Sources
- Fuse
- Wiring, terminals or connectors
- Trailer tow connector
- BJB
- Trailer concern
Visual Inspection and Diagnostic Pre-checks
- Verify the BJB fuse 99 (30A) is OK.
- Inspect the trailer tow connector for signs of corrosion or damage. Repair or install a new trailer tow connector as required.