Problems with 1994 Ford Bronco 4x4?

I'm having problems with my 1994 Ford Bronco 5.8. The 4x4 went out and the light it stuck on 4x4 but it is not in 4x4. First the 4x4 high went out, but the 4x4 low worked. Then a few months later the low went out as well. The light, as I said, is now stuck on, but there's no clicking or movement anywhere when you press the buttons. Any help?!

Check the ground wire on the actuator located on the transfer case. It is a common problem to have corrosion that prevents a good electrical connection