1995 jeep grand cherokee

have a vacumn line hanging down from front axle housing.is it a vent or need to be connected some where else

It might be the vacuum line to engage the front hub.

Tester

Can you find an unconnected nub anywhere within reach?

do you know where i can get a diagram?

Look for something like this on the front axle.http://www.autozone.com/shopping/repairGuide.htm?pageId=0900c152800a9ea7

Tester