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.
Reading Off The Parameters
Data can be read off from the Trailer module (TRM) using this function.
Battery voltage
Reads off the level of the power supply to the control module.
Input signal
Reads off the status of the directly connected stop lamp signal from the central electronic module (CEM).
Output signals
Reads off the status of the output signals to the cable harness for the tow hitch.
Trailer connector
Reads off if the trailer connector is connected to the output on the cable harness for the tow hitch.
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
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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.
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