RandyT
Elite Member
The alternate is to physically run a ground wire to every electric ground connection on the trailer and connect it through whatever means to the ground wire at the 7 pin connector and not even use the trailer frame as a ground. Works great with LED lights that have a separate ground wire unlike incandescent lights that ground through a mounting bolt in the light housing. But even those would benefit with a direct ground wire connection as you mentioned.I believe all the bases have been covered but the bases are often evasive when it comes to trailer wiring. Since faulty ground accounts for most trailer light and brake problems let's solve that once and for all. Braze a 1/4" brass bolt head to trailer frame and connect ground from 7 way to it with brass washers and nut. If brake magnet grounds connect to backing plates ,extend wires to additional brass bolts brazed to frame. Reason for doing this is there are several BOLTED TOGEATHER components where high resistance can set up. Examine frame to make certain there is a continus path through WELDED joints going back to 7 way ground bolt. If lo and behold frame is bolted together, braze bolts on either sides of joint and jumper with copper wire or braze copper plumber strap across joint. While you have tools out, add bolts for light grounds. This pretty much takes ground failures out of the equation for life of trailer. Test brakes. If no joy go to work on hot wire connections starting at and including 7 way. There are no better cleaners and protectants than the Deoxit line of products. If brakes still don't work you have at least set the trailer up for reliable testing and long term dependabe wiring.