well my 4x4 isnt working and im thinking it might be a vaccum line connected to the front cause its still lite up but when i push 4lo-4hi it just blinks an kinda clicks but no change. i did find a tubing hanging out from under the front passenger side fender. can someone walk my through checking the vaccum line maybe with some pics or diagrams. any help would be appreciated.. its a 99 4x4 4 door.