1993 GMC Jimmy 4.3 4x4 switch problem

Ok, I read ahead and disconnected the battery for 5-10 minutes and I still have the same problem:

When trying to engage the 4x4 to either upper or lower all I hear is a small "click" and it does not lock, the truck still remains in 2wd. It seems the "click" is coming from just behind the glove box. Also, it seems the lights on the 4x4 switch blink for a second - but nothing happens. I decided to take the switch appart to see if there were any bad wires, but could find no faults... I would appreciate any help I could possibly get!

Thanks,
Mike

just replaced the encoder motor on my sons 93 jimmy. seems to have been the problem. expensive and hard to find though.

Check this out may be of some help as I just did this a month ago:

http://myrepairs.50megs.com/index.html

did you try driving a couple of miles an hour and then hitting the button because i know that on my 96 it makes a weird noise when im not driving and try to engage the 4 wheel drive

I have a similar problem with my 1993 Jimmy...
And, when it is cold, is when I have the problem...
Like <30F. so try driving slow and putting in 4HI

How did you end up fixing it? I have the same problem.

just replaced the encoder motor on my sons 93 jimmy. seems to have been the problem. expensive and hard to find though.

What was the cost?
And, did You use aftermarket parts?
How much labor?
This vehicle is no better than a car at traction/etc. without 4-wheel drive.
Therefore, this is frustrating...
thanks and praise for these Forums... :o)