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Trailer Brake/Turn Signal Lights Not Working with Wiring Harness 118653 on a 2011 Nissan Murano


Just installed the 118481 wiring kit in the murano. Trailer also has new led light kit. Turned the vehicle on and have trailer tail lights when the vehicle lights are on. No brake lights, no signal lights.


Expert Reply:

It sounds like there is a bad ground connection somewhere. The first thing to check would be the converter for the wiring harness # 118653. Make sure that it is grounded to a clean metal surface. Use a circuit tester like # PTW2993 if needed to test the wires going into the converter for the proper signals. If they are not correct then there is a problem with the connections to the vehicle such as a bent pin, or a problem with the vehicle wiring.

If the signals are correct going into the converter, test the wires coming out of the converter. If they are wrong then there is a problem inside the converter and it will need to be replaced. If the signals are correct, that indicates a problem on the trailer.

On the trailer, make sure the 4-Way connector is corrosion free and clean. Then check the main ground from the connector and the grounds for the trailer lights. They should all be connected to clean and corrosion free bare metal surfaces.

This harness is rated for 2.1 amps maximum per side for stop/turn signals and 5.6 amps total for running lights. If the lights on the trailer exceed this it could blow the in line fuse or the converter.

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