Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Programmable Parameters
The instrument cluster will display TBC FAULT if it is receiving communications from the trailer brake control (TBC) module but has not been configured for a trailer brake system. If the instrument cluster displays TBC FAULT and there are no DTCs stored in the TBC module, follow these steps to verify and/or modify the TBC module programmable parameter in the instrument cluster.
- Identify the vehicle using the normal IDS process.
- Select Programming and press the check box.
- Select Module Programming and press the check box.
- Select Programmable Parameters and press the check box.
- Select Personality and press the check box.
- Follow the on-screen directions.
- Highlight TBC-IC.
- If the instrument cluster needs to be configured for a trailer brake system, choose EQUIPPED and press the check box.
NO RELATED
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Affiliate disclosure: We may earn a commission at no extra cost to you.
When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.