93 Big Blazer - front differential
 

93 full size blazer. No 4wd already replaced the actuator. Transfer case works,
power to actuator. I know the 4wd has not been used for several years.
What can i try to get this working short of tearing it apart.

when mine did that it was the transfer case switch that sits on top of the TC. I was getting voltage to the actuator, but it was a little low. Like 10 or 11 volts.
https://www.chevytalk.org/fusionbb/f...5-1991_4wd.jpg