My work light (bed light) works intermittently and will flicker/go dim when I close the door and then turn off. I pulled the hub/bezel and cleaned the contact as best as I could and even installed an LED bulb instead. Still have the same issue. I tried to trace the wires coming into the cab but can't seem to find them and I have no idea how to trace or see where they go. I'm guessing there is a loose wire/ground but again I do not know where it goes. I pulled the interior light fuse and it looked fine. Any help/pictures would be appreciated!