four wheel drive indicator light failure

I own a 94 Blazer and I got it stuck helping a friend unstick his ford. I gave her hell trying to get out and later that night I noticed the Four Wheel Drive indicator light wasn't on when it should be. Any info on what could be wrong would be greatly appreciated.

Take it to Autozone and let them hook it up to the scanner an see what error code(s) you get. Easiest and cheapest way to find out your problem. Could just be the little bulb behind the indicator has gone out?