Fuse blowing in car when boat is in tow

[taxid]

Blows out the fuse that controls the dash lights and tail lights except for the break lights and flashers. Boat trailer was rewired by a professional last year with no problems on several trips. Now it's a problem.

Ideas? What to look for?

[Bowmandan]

Bare spot on trailer wire causing a short or pinched wire causing a short

[Mac Attack]

Bare spot on trailer wire causing a short or pinched wire causing a short

         x2

[taxid]

Thank you gentlemen!

[Fishermantim]

The fish have learned basic wiring skills and are sabotaging your ride in the hopes that you stay home!

[taxid]

The fish have learned basic wiring skills and are sabotaging your ride in the hopes that you stay home!

I thought I saw one nipping at the trailer wiring when I was launching! 

[Keith Walters]

If you have a loose ground wire or the little sockets inside the flat rubber plug are not tight on the part that goes inside them, you can blow a fuse.  Intermittent contact can do it.  Try squeezing the sockets in the flat rubber plug VERY GENTLY. This is a problem that usually blows the fuse after you drive a few miles.
The brake lights are on different fuses.

Good luck,
Keith

[taxid]

If you have a loose ground wire or the little sockets inside the flat rubber plug are not tight on the part that goes inside them, you can blow a fuse.  Intermittent contact can do it.  Try squeezing the sockets in the flat rubber plug VERY GENTLY. This is a problem that usually blows the fuse after you drive a few miles.
The brake lights are on different fuses.

Good luck,
Keith

Thank you Keith! Was looking things over the other day and so far haven't found anything except the ground wire on the trailer seems not to be in good shape where it connects to the bolt. I think I'll take it off the bolt, cut it and reattach a connector.

[Fish Farmer]

I had the same thing happening with my truck and it happened to be one of the wires coming from a rear taillight assembly that was rubbing raw on the inside of the body.

[taxid]

I had the same thing happening with my truck and it happened to be one of the wires coming from a rear taillight assembly that was rubbing raw on the inside of the body.

Thanks. Still looking. Haven't found anything yet.

[fishnmachine]

It could also be water in the light housing. 

[taxid]

It could also be water in the light housing. 

Good point! I have one light housing that is broken and after bringing back out of the water perhaps water stays in there? (I do unplug before I launch).

[fishnmachine]

Moisture and electricity...... 
I'd replace it, especially if the wires look good everywhere else.  

[Mac Attack]

Good point! I have one light housing that is broken and after bringing back out of the water perhaps water stays in there? (I do unplug before I launch).

LED marine trailer lights.

https://www.amazon.com/CZC-AUTO-Submersible-Trailer-Snowmobile/dp/B06ZZRKYHD/ref=sr_1_1?s=automotive&ie=UTF8&qid=1503579701&sr=1-1-spons&keywords=led+trailer+lights&psc=1


I will NEVER use incandescent lights again on any trailer I own.  PERIOD!

[taxid]

LED marine trailer lights.

https://www.amazon.com/CZC-AUTO-Submersible-Trailer-Snowmobile/dp/B06ZZRKYHD/ref=sr_1_1?s=automotive&ie=UTF8&qid=1503579701&sr=1-1-spons&keywords=led+trailer+lights&psc=1


I will NEVER use incandescent lights again on any trailer I own.  PERIOD!

Sounds good but I just had the entire thing rewired last year and it wasn't cheap.