i have 91 cc 4x4 3.9 5 spd.my 4wd is not engauging.what could be wrong.t-case is working.i can put it in 4l and it just creeps along but it only sends power to the rear tires.no lights or anything light up on the dash.attached is a pic of something on the front axle with vac lines and a electrical hook up.what is it for?and how can i get the 4x4 working?

 

The CAD Central Axle Disconnect is a common problem. This link will help. http://www.walt-n-ingrid.com/modifications.html#4x4

 

thank you...checking the cad now