I been towing my boat [ 4 flat] and all lights were working. Towed my pop up couple weeks back[7 pin] everything fine .

This weekend towed both and the right brake light on both trailers would not work. Every light worked on the truck. Parking lights worked on trailer, the left brake light worked, right brake light would not work on either trailer??

 

Are you asking what is wrong or just telling us you've got problems with your truck and trailer wiring harness?

 

Did you check to make sure the bulbs are good? The plug on the truck feeds both right and left brake light through one wire.

 

HAD A bent over pin , on the 7 pin . Will see if it works?

 

hope nother popped........fuse wise i mean. Not easy to read the inside of that box to see which fuse is which

 

Yea I know about the fuse box on trying to read the lid. I checked all the ones assoacted to trailer.
I got home and rebent the tab out, installed the 7-pin plug and all worked on the lights

 

a happy ending woo hoo!!!!!!!!!!