I need to find a diagram which shows me how my vacume lines should run for my 4 wheel drive. 1990 jeep wrangler

http://www.wranglerforum.com/f218/vacum-diagram-90-yj-with-4-2-a-89703.html page 5

wiring or electric motor prob or it could be vacum line prob too.

Are you in neutral? Are you rolling slowly?

i just boought a 1992 Jeep Wrangelr sport with a chevy 305 V8 and its a automatic with a standard 4 wheel drive and i put in 4 wheel drive and the front tires wont move what is wrong????

you could have a bad vacume line or your acuator could be bad. but a bad wheel bearing could do it

Autozone.com, register for free repair info

there should be 3 plastic lines tha hook to the actuater.mine has a slip on rubber that has 2 of the lines that go together then you have a single line that is just that simple.

what are you trying to say is that the front wheels wont engage?? if this is your problem? check the actuater on the passenger side axle there are 3 lines that go to it and that is what pulls it in and pushes it out of gear by air.

Try to replace the vacume lines to the actuator on the front axle?

if you look under the Jeep on the passenger side of the front axle you will see a vacume mod its kind of round shaped it should have a vacume plug on it wit ha few hoses going into it make sure its plugged in for starters these come off all the time if it looks good here simply follow the lines into the engine compartment and look for broken hose this should get you a fix most of the time, the mod could be defective but not likely.