4WD Not Working

What does "no 4WD" mean? Did you not get a dash light? When in 4 LO, did it go into low-range or did it stay as if it were in normal highway driving?
 
The dash light is just an indicator. The t-case is manual. The stock linkage can come out of adjustment or even disconnected. I would crawl underneath and disconnect the linkage rod from the t-case lever. I would then move it by had to the required position and test them all. If all positions are working, it's not a t-case problem ... Adjust the linkage, or better yet, replace it with a Savvy cable shifter and never worry about it again.
 
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I put a cable shifter on my last TJ and let me tell you, it was great! Shifted smooth as silk. My current TJ has stock linkage, but if it ever gives me one little hiccup ... It's history!!!
 
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