2016 Ram 2500 Tradesman 6.4 Hemi. My left rear tail light works, but the turn signal and brake light does not. Yesterday, when I pulled my boat out of the water, I did not have any light on the left trailer light. I made sure I seated the cable from the trailer to the truck, and the trailer light worked. A short time later I got a warning that my left rear signal on the truck was out. But, at that time, it was still working. Today, I got the same warning, and now it does not work.