4x4 drive issues

[Koletrain]

I have replaced the actuator on the front diff. You can hear the transfer case engage into everything fine. After replacing the actuator I saw the 4WD fuse inside the cab fuse box was blown. I replaced it. Tried to engage the four wheel again with the new actuator and fuse still nothing the front drive shaft will spin when in four wheel. The front tires won't. And noticed after switching everything out (actuator and fuse) the fuse blew again. Any ideas where to start? This is all on a 96 GMC Sierra Z71

[2reckless2drive]

Im having some troubles with my 4wd as well. You said that the front drive shaft spins but what about the C/V axles? Well actually idk how you would really check that because they will always spin so i guess to check youd have to jack up the front end whike shifted into 4H until both tires are off the ground and spin one wheel to see if the other one spins as well. Or if they dont spin at all which im pretty sure would be good cuz thatd mean the transfer case is locked in both drive shafts and engaged the front diff. Or only the tire your spinning spins then id have to say the problem would have to do with your gearing in the front differential. which from the sounds of it is more than likely the issue. the fuse dilemna is throwing me off tho idk what thats all about... 

 

[Brandon Todd]

Check your wiring to the actuator. Could be shorting out somewhere causing the fuse to blow.