Greetings. I will do my best to assist you. When you are finished please click on accept if you are satisified. I don't get paid unless you do. I don't know if you are a tech or a just working on your own vehicle so we may have to fine tune the answer. I only know as much about your problem as you have told me in your post, so my answers will be based on what you tell me so please add all the details you can.
For the fuse to pop, it sounds like there is a problem at the shifter itself. Is there any wiring damage? How is the transfer case fluid?
First sorry about the delay, I am not a mechanic and need to check things between work and family stuff.
I did not see any wireing damage at the new switch area under the dash and there is plenty of fluifd in the transfer case. I checked it and also had it replace a few month ago when the transmissions was repplaced.
Could this be related to the new tranny?
I do see several wire loops around the trany and transfer case area but I did not notice an exsposed wires
OK, if all that is good then it may be a fault in the shifter motor then drawing too much power.