“Trailer Brake Fault” on the Dash?
If you tow heavy loads, you know your Integrated Trailer Brake Controller is essential. This guide explains how to troubleshoot the factory system and identify module failure.
Factory Integrated vs. Aftermarket
Modern trucks from Ford, GM, and Ram come with an ITBC. Unlike aftermarket controllers (like Prodigy) that just “guess” when to brake, the ITBC is linked directly to your truck’s brake master cylinder. It knows exactly how hard you’re pressing the pedal.
👨🔧 Pro Tip: It’s Usually Corrosion
“90% of ‘Trailer Brake Fault’ messages are caused by a green, crusty 7-pin connector on the bumper. Before you buy a module, clean the trailer plug with electrical contact cleaner and a small brush!”
Signs of ITBC Module Failure
- ✅ Message appears with NO trailer: The system is “hallucinating” a short circuit inside the module.
- ✅ Manual Slider doesn’t work: You can’t manually apply the brakes using the dash switch.
- ✅ Code C111B or C1114: Common codes for Trailer Brake Output circuit failure.
Experts in Ford, GM, and Dodge Programming
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