The driver's side tail light will not function when the lights are on, but the brake and turn signals work. I tried replacing the bulbs and even plugged the passenger side light into the driver's side...did not work. I then plugged the driver's side light into the passenger side, and it worked. So, I know both light fixtures and all bulbs work. I can't figure why the driver's tail light will not light when the headlights are on. Any suggestions?
