My guess is that you had a lightning strike that popped the ground fault breaker and damaged the timer for the light. You can get replacement parts from S*ears , either by phone or online through their Web pages. That is, if you don't mind taking the unit apart.
If it's not a bother to do without the light, I'd just remove the bulb and not worry about it.
Or, you can replace the entire unit. If you go with another Craftsman, it's easy and you don't have to replace everything.
[This message has been edited by rpxlpx (edited July 25, 2002).]