Ok been doing a lot of work on this 1998 blazer
Yesterday I changed the tranny fluid and internal wire harness on the truck.
I had to lower the support a little for the transfer case to drop the pan.
I wanted to go for a test drive when I was done and all seemed well. I stopped for some gas after about 4 mile drive or so and when I started it back up it was stuck in 4lo.
Today I took a look and found that the actuator under the bat had a tear in it. I replaced that today and reconnected everything.
Now the thing is that if I turn the key to accessory I can get it to change two times and that is it. I can go from 2hi to 4hi. or 4lo to 4hi any combination

works but if I try and push a third time I hear nothing. If I start the car I can not change it at all. Only when in accessory and not running.
What could this be?
Did I cause a wire to come loose when I lowered the transfer case a little?
Here are some things that I noticed. When to actuator was torn it leaked some liquid. That is how I noticed it. Second I checked the fluid level in the transfer case and it was well above the fill hole, about 2quarts over.
Third thing is that I k now the selector switch for the 4x4 is defective because the lights would not work before. If I squeezed the switch I could get the lights to go on and off but it always worked before I dropped the pan minus the lights. I could hear the 4x4 engage.