Trailer lights Issue

[InfantryMP]

Hey Everyone!

 

My triton boat trailer was re-wired in 2018ish with new LED lights. 

 

Last year I had issues with the lights flickering because my F150 had a bad connection at the hitch wiring. I have a new truck now, and I went to plug in the boat to ensure the lights are still good. The only lights that are working are my front running lights (amber). No reverse lights, no tail lights, nothing.

 

Before I take it in to get rewired, I have checked grounds and they are good. The plug internally is wired correctly as I check that as well. Is there any obvious thing I am missing here? I did not move the truck while looking at the lights, I was just checking them stationary. 

[jbsoonerfan]

I don't know if these are options for you, but I would find someone with a truck where you could plug the boat in to their truck to see if it works. Also, you could find someone with a trailer and plug theirs into your truck and see if they work. Finding the "problem" to chase would be the first thing I would do.

 

I guess I should have added, that I would check the fuses in the truck first but I would assume they should be good on a new truck.

[Deleted account]

Good advise above. Also, depending on how many pins you have, that may give you a clue with what's working and what's not. You could get a connector and hook it up to 12v, to eliminate that as the problem, then test for continuity on the wires and ground, as well as the lights themselves. intermittent problems are sometimes a pain to find, most others are fairly straight forward.

I gotta diagnose no defrost on my HVAC at some point, but the fishing has been good, so, that will have to wait.

 

[Way2slow]

Never figured out how to see electrons in a piece of wire, so I've always used a voltmeter to diagnose electrical problems.   A few minutes with a voltmeter and little understanding of what and how to check it, should be able to isolate the problem fairly easily.  Even a little test light is better than trying to guess.