If the front driveshaft isn't turning then your problem isn't the actuator.
It's probably the motor on the transfer case. Even if the actuators aren't
working the front driveshaft will turn. If the front driveshaft is turning then
you can try to work the actuator by hand while someone turns the switch.
Of course you should put the truck on 4 jackstands to be safe.
I did this on my 99 4x4 and it was only stuck do to lack of use by
previous owner.