Possibility if you use it all the time, it could have overloaded the circuit and blown the fuse for it, Usually the interior light is in the same circuit but not 100% sure, if that still works, there is a fuse box in the drivers foot well under the steering wheel, itl have fuse names under there, u can either use a test lamp to test the fuses or just get some long nose pliers and pull them out and check them but be careful not 2 damage any off them. There is also a fuse box in the right hand side of the engine bay. If any are blown fuses there might be spare fuses in the fuse box you can use, if not halfords etc will have something. Hope that helps Thanks Gary