Symptom Chart
WARNING: This page is about a different car, the 2016 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 Diagnostic Methods in Service Information for information about these practices.
Symptom Chart
| Condition | Possible Sources | Action |
|---|---|---|
| A module does not respond to the scan tool | Fuse Wiring, terminals or connectors TBC module |
REFER to Module Communications Network . |
| The trailer brakes are inoperative | Refer to the Pinpoint Test | GO to Pinpoint Test A . |
| The trailer brakes are always engaged | Refer to the Pinpoint Test | GO to Pinpoint Test B . |
| The message center intermittently displays TRAILER DISCONNECTED or WIRING FAULT ON TRAILER while towing a trailer | Refer to the Pinpoint Test | GO to Pinpoint Test C . |
| The message center displays TRAILER BRAKE MODULE FAULT | DTCs present | RETRIEVE and RECORD the DTCs. GO to the DTC Chart: TBC Module . |
| The message center displays TRAILER BRAKE MODULE FAULT when the vehicle is not equipped with a TBC module | Incorrect IPC configuration | REPEAT the IPC PMI procedure using a diagnostic scan tool. FOLLOW all diagnostic scan tool instructions. |
| The message center displays WIRING FAULT ON TRAILER | Refer to the Pinpoint Test | GO to Pinpoint Test C . |