Trailer Connection Fault. The dash is displaying "TBC fault" and the trailer connection display is flashing on and off at different times. Trailer brake problems Quick fix if new truck is not reading electric over hydraulic brakes.
In the North American market it is very common for brake lights and turn signals to be combined.
A number of standards prevail in North America, or parts of it, for trailer connectors, the electrical connectors between vehicles and the trailers they tow that provide a means of control for the trailers.
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The dash is displaying "TBC fault" and the trailer connection display is flashing on and off at different times. TRAILER FAULT: The TBC is capable of determining certain faults in. the vehicle wiring and trailer wiring/brake system. The info screen still shows trailer disconnected this never happened before.