May 21, 2014 - 12:11 PM
Most often this is a tow vehicle issue. The other lights on the trailer (turn, brake, and clearance ) can all work, but if the tow vehicle hot line or circuit is not energized then the interior light will not work. This can be a result of a blown fuse or a blank Dummy fuse in the fuse block. This fuse is commonly described as "Battery Charge", or "Trailer Tow Package" in your vehicle owners manual. The tow vehicle plug can be checked with an immulator or test light to confirm the Hot lead is energized. This lead is located at the #4 slot, 1 O Clock position in the tow vehicle plug. Any further questions or assitance needed, please feel free to call us at 877-850-7587.