Symptom Chart: Notes
WARNING: This page is about a different car, the 2007 Ford Pickup, 2007 Ford F550 Super Duty, 2007 Ford F450 Super Duty, and 2007 Ford Cab & Chassis. However, it is still accessible from the selected car via links, so may be relevant.
Symptom Chart
| Condition |
Possible Sources |
Action |
- No communication with the trailer brake control (TBC) module
|
- Central junction box (CJB) fuse(s):
- Circuitry
- TBC
|
|
- The TBC module LED display does not illuminate and the trailer brakes are inoperative
|
- Central junction box (CJB) fuse(s):
- Circuitry
- TBC module
- Customer trailer
|
|
| |
- Anti-lock brake system (ABS)
|
|
- The trailer brakes are inoperative
|
- Central junction box (CJB) fuse(s):
- Circuitry
- TBC module
- Customer trailer
|
|
- The trailer brakes are always engaged
|
- Circuitry
- TBC module
- Customer trailer
|
|
- The message center intermittently displays TRAILER DISCONNECTED or CHECK TRAILER while towing a trailer
|
- Circuitry
- Customer trailer
|
- RETRIEVE any DTCs. If no DTCs are present, go to Pinpoint Test H . If DTCs are present, RECORD the DTCs and Go to the Trailer Brake Control (TBC) Module Diagnostic Trouble Code (DTC) Index.
|
- The instrument cluster displays TBC FAULT
|
- DTCs present
- Central junction box (CJB) fuse(s):
- Circuitry
- Instrument cluster
- TBC module
|
- RETRIEVE any DTCs. If no DTCs are present, go to Pinpoint Test H . If DTCs are present, RECORD the DTCs and Go to the Trailer Brake Control (TBC) Module Diagnostic Trouble Code (DTC) Index.
|
- The instrument cluster displays TRAILER FAULT
|
- Circuitry
- TBC module
- Customer trailer
|
- Without
a trailer connected to the trailer tow connector, go to Pinpoint Test d .
- With
a trailer connected to the trailer tow connector, SEND the trailer to an authorized camper/trailer repair center.
|
- The TBC module manual control lever knob is missing
|
- Missing control lever knob
|
- INSTALL a new control lever knob.
|