Troubleshooting Trailer Wiring Harness for Nissan Frontier

Question:

It worked fine then just quit. My lights on the truck still work. Help! 118363 for Nissan Frontier

asked by: Paul

Expert Reply:

The T-One Vehicle Wiring Harness with 4-Pole Flat Trailer Connector # 118362 connects directly to your factory wiring, so I recommend checking the connectors first for proper connection and then use a circuit tester like # PTW2993 to check the wires for function going into the Modulite and then coming from it. If there is no signal going into the Modulite check your fuses and then if needed trace the wires with the tester searching for a short.

If you have function going into the Modulite but not from it, the Modulite has failed and will need to be replaced.

expert reply by: Jason S