Hello, I am new to the forum and am in need of some advice. My problem is the 4x4 won't engage on my jeep. I have a 93 wrangler with just over 38,000 original miles on it. This thing is practically like new! Anyway, I know the problem is with the vacuum to the actuator on the front axle. All the posts I have read tell you how to check for vacuum and if there is vacuum or isn't vacuum what is wrong. I have no vacuum to either line on the actuator and it doesn't matter if it's in 2 wheel or 4 wheel. No light on the dash, nothing. My question is this: where does the vacuum come from that goes to the transfer case. There are 4 lines coming off the transfer case, and only two go to the front end. I have looked at the diagrams on here and I just can't figure out where the other two lines are supposed to go. When I try to follow them on the jeep, they are in a loom/harness and I lose them. Any advice?