S-10 Blazer 4X4 Stuck on?

Hi everyone and thanks for looking and hopefully helping! I bought a 94 S10 Blazer with the 4x4 push button activator. Well my 4wd was not working at all. So i looked and found the vacuum on the engine was disconnected. So i reconnected it, WALA and 4WD button turns on and feels like its kicked in, now the dissappointment is it will not turn off unless you unplug the vacuum and let the truck sit for a short time untill the vacuum is gone. The 4WD stays on if vac is plugged in and i didn't even touch the 4wd switch. I would like to use my cruise control, the vents on my ac and all. I know this all needs vac. Any suggestions?

Thanks
Conrad

Check that vacuum switch on top of the transfer case. It dumps the vacuum from the actuator under the battery. Almost positive that's your problem.