4 Wheel Drive/SUVs: 94 mazda b4000 4x4, passanger tire, vacuum lines

Question
Hey, I see you specialize in Fords, but the engines in Mazdas are the same, so I figured you might know... The four wheel drive in my 94 pickup doesn't engage all the tires. The most noticable is the front passanger tire does not engage when in four wheel drive high or low. I assume that it is a vaccum hose not attached or something little like that, but I cannot find information on the routing of the vaccum system for my four wheel drive! Any information you can give me about this would be most appreciated :) thank you!

-Dan

Answer
Well if you look underneath where that hub is you might be able to find the vacuum line, and possibly trace that back to where it comes from. Or you may have a stripped out hub.
Id check the vacuum lines first. and if you still cant find where it goes I would go buy a haynes, chilton or other service and repair manual for your vehicle they can be purchased at most auto parts stores.