Help for Unreliable combo brake turn signal light on trailer

When I had a 5th wheel, I had rear light issues that drove me nuts. It seemed the problem was related to the ground wire. I ended up removing the light can and soldering all the wire connections. I also tighted up the light bulb connection. If you are using the 1157 bulb its just sitting in the correct spot by a hope and a prayer. You may have to rework that area also.

Good Luck