I have a 4 year old tow master car dolly with electric brakes. After towing through some wet weather. Some of the lights work (right side brake) some don't. Any ideas what the problem might be? I know there is power from the MH as the auxiliary that I put on top of the car all work and connection is spliced into the harness right behind the plug.
Possibly moisture in the bulb socket. Remove the bulb and dry everything out reinstall and see if it works. Or as said above the individual lamp ground could be bad and in need of cleaning. I don't think that it would be the main ground since some of the lights work. JMO
Jack 2003 Rexhall Vision 27' 2019 Chevrolet Equinox States we have been to with this MH
find the ground wire ,,white,, remove from trailer and clean wire and frame rebolt. sounds like you have a bad ground.while your at it clean the plug end ,
