IF the problem is that it does not light up you can re-build the light easily, They use two different light assemblies,
One is a standard light builb, Which can be easily replced, any auto parts place or gas station should have the bulb.
The other is an LED.. Now the LED ones can be a problem (MINE WAS) I had to modify the circuit after the first led went, and a replacement went, I made a small change in another component and,, ,So far (Checked it last Wed) It still worked fine.
I can give you a l ist of parts and mods I did to the light, only 2 parts and enlarge a hole. I canged the resistor, I believe I used 650 Ohms (600-700 should work) and a JUmbo LED from Radio Shack, (Why I had to enlarge the hole) IF I'd have used a standard LED I'd have had to use a slightly larger resistor.
Home is where I park it!