So I changed the fuse on my 4wd and was able was able to get it to go into 4wd finally. Unfortunately it wouldn't come out so we tried putting in 4hi then to 2hi. Going back and forth between neutral and drive. And the 4wd light would stay on and the front driveshaft was still turning. We even shifted from 4lo to 2hi while in neutral, obviously, and even tried turning off the truck and turning it back on. Nothing seemed to work so I just took out the front driveshaft to drive in 2wd. Low range worked so I know the t case is still shifting just the actuator might be stuck ? I have a np241 on a 91 GMC k1500. Any ideas on what might be causing the issue ? I bought a posi lok cable and plan on installing that here soon so I'm hoping not to have this issue with the posi lok.