My bf ran my blazer off a shoulder blowing out both passenger tires... pretty hard hit, even bent one of the rims. Reason I tell ya this is since then my 4 wheel drive hasn't worked.. switch just blinks. I put key in on position and tryed to switch and transfer case engages, or whatever its called.. took battery and tray out to see if I could figure anything out w the vac lines.. Idk which lil thing is the actuator:/ but nothing seems to be unattached or broken from anything BUT there's a random hose under there that's been broken off something but Idk where from. The hose runs to an electrical connector thing on the firewall.. there is another hose coming from it that runs to the drivers side and connects to another hose that disappears into the fender. Does this hose have anything to do with 4 wheel drive? Where does the broken end go? I've looked a lot for a diagram with no luck Oh its a 2002. Thanks for viewing, hope you can help!

 

There's a vacuum line that goes from the solenoid on the firewall to the actuator under the battery tray. Sounds like maybe one end of that hose got disconnected.