Four Wheel Drive Problem

My 95 Jimmy started blowing fuses when I would try to put it into 4X4. Sometimes it would work and other times it would blow the fuse. Now, it doesn't do anything. It works fine in 2 Wheel Drive, but, now, nothing happens when I try to put it in 4X4. Any ideas.

wow, sounds like a definite short circuit somewhere, must be between the relay and the switch....blew fuses for a while then eventually burnt through the wire i suspect. start by doing some wire tracing, or do a continuity check with you multimeter, set it to Ohms and check the wires. hope that helped.