Symptom Chart: Trailer Lamps
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.
Diagnostics in this article assume a certain skill level and knowledge of Ford-specific diagnostic practices. Refer to Service Information for information regarding Ford-specific diagnostic practices.
Symptom Chart: Trailer Lamps
| Condition | Possible Sources | Actions |
|---|---|---|
| A module does not respond to the scan tool | Fuse Wiring, terminals or connectors Module |
REFER to Module Communications Network . |
| All the trailer lamps are inoperative | Wiring, terminals or connectors Trailer tow connector Trailer concern |
GO to Pinpoint Test AG . |
| One or more trailer stop/turn lamps are inoperative or always on | Fuse Wiring, terminals or connectors Trailer tow connector Trailer concern Trailer Module (TRM) |
GO to Pinpoint Test AH . |
| The trailer parking lamps are inoperative or always on | Fuse Wiring, terminals or connectors Trailer tow connector Trailer concern Trailer tow parking lamps relay |
GO to Pinpoint Test AI . |
| The trailer reversing lamps are inoperative or always on | Fuse Wiring, terminals or connectors Trailer tow connector Trailer concern Trailer tow reversing lamps relay |
GO to Pinpoint Test AJ . |
| The trailer battery charging is inoperative/does not operate correctly | Fuse Wiring, terminals or connectors Trailer tow connector Trailer concern Trailer Module (TRM) |
GO to Pinpoint Test AK . |