They stopped working last time I plowed, so the other day when it was sunny, I pulled the tails out, one wire was wore down bare in a spot, and the plug melted. I put a new plug on it, and taped everything up. Checked the fuse by the battery, and the one build into the control box, both good. Flip it on....nothing. I unplugged all 4 lights and tried powering it up doing one light at a time... nothing. I have 14v coming from the plug for the battery, I have 14v at the plug going to the switches, but I have no power coming out of the plugs for the lights. So now what do I check?