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Newly Installed Trailer Tail Lights Work but Are Very Dim

Question:

I recently installed a new light kit to my trailer all works well running lights signals etc ,but my lights look really dim.

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Helpful Expert Reply:

Dim trailer lights can be a symptom of a bad ground or wiring harness connection. Make sure that the vehicle side and trailer side connectors are clean and free of corrosion inside and out. The main connector grounds should be attached to clean and corrosion free bare metal surfaces.

The light grounds should also be attached to clean and corrosion free bare metal surfaces. If there is anything between a light ground and the metal trailer frame or if the trailer has an aluminum frame, tilt bed, or folding tongue, any of these things can interrupt the ground. Running jumper wires from the light grounds to the main trailer connector ground can help.

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