Trailer lights acting funny

[fredster]

I have had the ground wires corrode off TWICE right at the crimp/connector point in the 8 years I have owned my RNR trailer. The ground is on the bottom of the center tongue frame right in the 'salt stream'. The first time I cut off the end and added a new connector. The second time I ran TWO ground wires from the front to the ground point, plus added a ground wire from there to the back. Overkill perhaps, but the lights have worked fine now for 4 years.

Opps. I just jinxed myself. Now they won't work the next time I head out.

 

[maximumpsi]

All Trailer Lights Go Off When You Hit The Brakes = Ground Problem

I put a volt ohm meter on the frame. I am getting some reading from the frame when lights are on also a on and off reading while the blinkers are on. If I have the tail lights on and I hit the brakes everything goes off as long as I have my foot on the brakes. the reading is twice as high when tail lights and turn are on. What the (*&^ is going on?

I've seen this problem 3x in the last year. All trailer lights work until you hit the brakes. Then all lights go dark. In each case the ground on the truck's wiring harness was not grounding well to the truck frame. If this is the problem, the first place I would look is the ground on the truck frame.

 

[KnappAttackAC]

I had that problem with my 2 place tilt trailer for the longest time till I put a jump wire from the tongue frame to the trailer bed frame. Not getting a good ground does all kinds of weird things to the lights on the trailer and sometimes depending on what tow truck it was even that go weird.

 

[yamarage07]

I had the same problem on my boat trailer run a ground wire all the way back to your lights should take care of it