Boat Trailer Wiring Headaches.

[rgfixit]

Well that helps if there's provisions for an additional geound at the lights. Generally, bolting the light to the frame  and assuring a cold geound connection to the fame is sufficient.

On another note, if you haven't switched to waterproof LED lighting........do it! I'm going on 10 seasons on mine without a problem. I've replaced the plug on both trailer and truck a couple times. They get corroded eventually. Dielectric grease helps but not forever.

Rg

[taxid]

I've fixed more trailer lights for friends than I can remember.



This simple diagram tells it all. A simple 12v tester connected to a good ground will tell you everything you need to know about what's  working and what's not.

Most new vehicles have provisions for an adaptor that's well worth the investment.

Your choice to take it to a garage for repair is probably a good one.

Rg

That diagram came with my new harness. Didn't help. 

[rgfixit]

Sorry

If I were nearby, I'd fix it for you.

Rg

[taxid]

Sorry

If I were nearby, I'd fix it for you.

Rg

Thanks for the thought! 

[rivereddy]

There's almost nothing more frustrating than boat trailer lights.  It looks like you've gotten plenty or good advice and
your problem is solved.  I want to add another possibility for someone else reading this thread.  I went through pretty
much the same deal you did - even replaced the harness with no luck.  I took it to the local trailer guy, who, promptly
raised the hood, opened the fuse box and replaced the bad fuse........ Sort of like "Did you make sure it was plugged in?"

Happiness is ONE good trailer light on an 18 degree morning hunting ducks.......

rivereddy

[rivereddy]

I saw one good report about LEDs,  Anyone else use them?...

fish on

rivereddy

[Mac Attack]

I saw one good report about LEDs,  Anyone else use them?...

fish on

rivereddy

Yes
Won't ever use anything else on a boat trailer
Ever!

[massNtrash]

I saw one good report about LEDs,  Anyone else use them?...

fish on

rivereddy

Yep it is the only way to go! I never unplug my lights while I am backing in and haven't had any issues. I even have some super bright submersible led backup lights on my trailer.

[taxid]

Wow those are bright!

Yeah everything works fine now. Look forward to getting out at least once a week especially now that temps are more bearable. What to get to know three or four local lakes really well. I have forty lakes within 20 minutes! One I can catch a nice mess of bluegills in the spring and summer easily now. Shouldn't be an issue in fall and winter either.