awd problems on 1997 Chrysler Town & Country

the awd does not work the front wheels will spin in the snow butt nothing from the back ones is there something that goes bad a relay or fuse

Asked by for the 1997 Chrysler Town & Country
I can't find a wiring diagram for the system but I can tell you that it's vacuum operated and the vacuum line on the rear power unit may be broken, simple as that. That would be the simplest thing. You can check that but you'd have to get under the car so do that safely. There's probably a relay or fuse for the control system but you could find good info on that in the owner's manual. Check there.
Here's a directory link for you: