Symptom Chart

WARNING: This page is about a different car, the 2013 Ford F-550 Super Duty, 2013 Ford F-450 Super Duty, 2013 Ford F-350 Super Duty, and 2013 Ford F-250 Super Duty. 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	Fuse Wiring, terminals or connectors TBC module	REFER to MODULE COMMUNICATIONS NETWORK .
The trailer brakes are inoperative	Fuse Wiring, terminals or connectors TBC module Trailer	GO to PINPOINT TEST A .
The trailer brakes are always engaged	Wiring, terminals or connectors TBC module Trailer	GO to PINPOINT TEST B .
The message center intermittently displays TRAILER DISCONNECTED or WIRING FAULT ON TRAILER while towing a trailer	Wiring, terminals or connectors Trailer	GO to PINPOINT TEST C .
The message center displays TRAILER BRAKE MODULE FAULT	DTCs present	RETRIEVE and RECORD the DTCs. GO to the Trailer Brake Control (TBC) Module DTC Chart .
The message center displays TRAILER BRAKE MODULE FAULT when the vehicle is not equipped with a TBC module	Incorrect IPC configuration	CONFIGURE the IPC. GO to PROGRAMMABLE PARAMETERS .
The message center displays WIRING FAULT ON TRAILER	Wiring, terminals or connectors TBC module Trailer	GO to PINPOINT TEST C .