93 Ranger 4X4 won't shift to 4x4

[rangerwill]

My ranger 4x4 had not been used for a while, and when I tried it nuthin happened, no shift at the transfer case. I was told if you don't use 4x4 often the shift motor binds up due to dirt. I pulled it apart and cleaned it up, but no change. When I push the 4x4 button on the dash I hear the computer behind the driver seat clicking and a red LED light up and that's all she wrote.
No lights at the switch either.
I don't have any wiring diagrams to TS with so can anyone steer me in the right direction other than throwing parts at it?