:banghead: I need help trying to diagnos a problem with my 1988 jeep cherokee. I dont know if I need a vacuum switch or a motor for my transfer case. Can someone tell me how to find out if its the vacuum switch is bad or the transfer case motor. When I purchased the vehicle I was told that the 4X4 didnt work. Any help would be appreciated.:banghead:

Link for PDF:
http://www.dua1.com/AdminFiles/Jeep/88/88_Transfer_case_command_trac_with_vacuum.pdf