Trailer lights.. HELP

[idelkslayer]

I got tired of fixing trailer lights/wires. I use these magnetic lights now.

 

[Marble]

Old boat trailer. Working on it anyway. I would replace the entire wiring system, not just the plug.

I agree.

I also wonder if a wire has been chafed and is causing an issue. A rusty trailer is pretty hard on wire.

For the ground I would make sure of good metal to metal connections.

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[Caseknife]

4 wire harness all the way back to the lights, pull out the green at the right light, tie into the white and brown with waterproof connectors and continue to left light with white, brown and yellow wire. DO NOT use U-Haul/Come-back connectors, https://www.ebay.com/itm/3763791651...9993b6&gclid=d87a5c86825c1b9f64a93401109993b6

 

[IDElkmagnet]

Im going to agreed with the consensus your current issue is likely with the ground.
I would like to add that your next issue is likely to be where you are probing the wiring. Dab a little sealant on them before dipping it in the water and try to avoid that in the future.

 

[Rich M]

So you have new lights, new wires (come w light kit) and they wont work?

Redo the 3 grounds. Wire wheel the ground spots, use self tapping bolt. There will be a ground at each tail light and the tongue. Anyway, then paint them or put jb weld on there to keep it from rusting.

If your ball is rusty spray some wd40 on it.

I gave up messing w old wires a long long time ago. If trailer lights start acting up, will buy a kit and replace the lights and wires. Life is too short to mess around w stuff like that when you should be fishing.