not fishing but boat related.

[Frank]

I'm pretty sure it's the brown wire.. probably where it goes through the frame

[Frank]

I never unplug my lights when I launch. Have never had a problem. Just never had to submerge the plug

[Reel_Deal]

I never unplug my lights when I launch. Have never had a problem. Just never had to submerge the plug

i submerge just right over the fender. so no where near the plug. it only happens when i just pulled the boat out, dropped it in, or possibly when i start with them plugged in and auto lights on.

[Frank]

You you have a bare spot or broken marker light wire

[Davesnothere]

As Frank mentioned, most likely a bare spot somewhere. I had the same issue, if sitting still the lights worked for hours, no problem. Hit the road and 10 minutes in the running lights fuse in my '11 Chevy full size. My wiring was old. Obviously, the issue was a bare spot that would make contact as the wires bounced around while underway.

If your wiring is old, like mine was, you may find the problem is not confined to one spot, and it is simpler and less time consuming to buy the waterproof led full light kit at harbor fright or wallymart or your local trailer shop, etc.

Just my opinion, I chased it a few days and to be honest, the led upgrade was worth the investment. Good Luck!

[PatSea]

Do you have a converter module for the trailer lights that may have gone bad. I had a similar problem with my trailer lights and found that my converter was defective. Bought a new one and all is good.

[Fishhawk97]

I had the same issue at the beginning of the year thought I was going to have to rewire my whole trailer when I started to work on the trailer wiring found where a wire was spliced together for the ground and it had come apart fix that everything worked perfectly on anything I hook it to

[johneye]

if you have the option of the round plug or the flat plug plug the trailer in to the round plug before plugging into the truck the fuse usually blows when hooking up the flat plug round plug doesnt seem to short out when you plug in