T-case fuse blows?

[Mikebuild]

'96 silverado, 5.0L, auto. Four wheel drive won't engage, 2wd lite flashes then stays on. Have replaced switch in dash and bench tested axle actuator. Just put a new shift motor on T-case, then turned key on ... 4H lit on switch ... pushed 2wd and it shifted to 2wd. Thought I had it fixed, but when I tried shifting back to 4H it blew the T-case fuse (#2). Tried another fuse, no fix. Fuse #24 (FWD) is good. Unplugged both connections to new T-case motor, put power directly to motor and it moves both directions and the driveline seems to be engaged/disengaged accordingly. Is it possible that the T-case is shifting "too hard", thus putting too much load on the shift motor causing the fuse to blow? (it seamed to take a bit of effort to rotate the shift tang with an 8" adjustable wrench.) I'm going to try unplugging the front axle actuator and trying it again.

When the T-case shift motor is engaged the front drive line will not turn by hand, it seems to be engaged ... is this condition correct? or should I be able to turn the drive line thus turning the front wheels as well?
Any other ideas?
Thanks.

[MT-2500]

What transfer case?

If fuse is blowing you need to find short.

Fuse 24 feeds
Transfer case select button.
Spare power source.
Auxiluiry batter relay if one on it.