7 Pin Trailer Running Lights Not Working

7 Pin Trailer Running Lights Not Working. Re: Trailer running lights not working. Do any of the trailer lights work at all?

7 Pin Rv Trailer Plug Wiring Diagram | Trailer Wiring Diagram (Landon Evans)

If the tail light on that side is working you have a bad socket or connection in running lights. Same story on two separate trailers. There is a trailer pig tail behind the passenger side rear tire.

The one in the video would work but if there is an easier way.

I have worked on it many hours and searched on here for a few hours now and can not find the problem.

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With the fuse/relay running lights now work. Are you getting power to the truck-side trailer harness plug for the rear lights? Jump to Latest Follow. sweet. snap some pics of your handy work. :thumb: ► Show Full Signature. i bought a aftermarket plug at a trailer store. my wires were corroded too. the aftermarket plug was the kind with set screws so it was a easy fix. be sure to strip the wires.