Rem7mm870

Before I get into it, I don't have the auto 4wd so no transfer case control module. Before the code had appeared the truck was acting strange. One day it would put itself into 4hi, another 2hi, then 4lo, then neutral. It would come out of it each time. So I put in a new encoder motor, now it won't illuminate the selector switch or do anything when I try to switch between gears and the code appeared. I have cleaned the chassis grounds on the frame and inspected the tcase housing for any pump rub out but I'm at a loss. Any help appreciated!