# 2 transfer case fuse blows and 4X4 does not work?

The SUV listed above is a z71. 4x4 doesn't work original fault said c0323 for transfer case lock circuit low. The previous owner mentioned going through multiple transfer case motor when he had it. Replaced transfer case motor and when I would go to shift into 4x4 it would blow the #2 20-amp fuse. Started diagnosing and found no power on orange wire for 4 pin connection to transfer case motor traced back to plug at firewall and found plug full of corrosion. Replaced plug with weather pack and had power at orange wire and fault went away. Still blew the fuse. Did a resistance test across wires to transfer case motor to plugs at firewall all ohmed out good except tan wire for lock solenoid control. Ran an overlay wire for tan wire and spliced it in. Tested new wire and ohmed out good. Around this time the fuse started blowing immediately when I put a new fuse in. The next day started diagnosing again with no issues, then starting blowing the fuse all the time again. Kind of at a loss right now on where to go next.