loss of vacuum line on 1994 Dodge Ram 2500

there is a 1/2 inch vacuum hose at the rear of the intake manifold next to the brake vacuum connection and it runs the 4-wheel drive motor on the front axle. Where does the other end of the hose hook to?

Asked by for the 1994 Dodge Ram 2500
1 answer
The hose either routes to the Vacuum Reservoir or the Transfer case Vacuum Switch