while trying to get my 91 blazer front wheels to engage I noticed the vacuum lines were worn so I changed them out. I made sure to install the the way they came of the switch on the t-case. I took them off one at a time and replaced them so I know they are on right. I had vacuum before where as I do not have vacuum at the actuator switch now. If I did mess up somehow how can I hook the hoses up to the switch on the t-case to make sure they are right I know one line comes from the manifold one goes back to the actuator and the other is a vent line. Is there a way to make sure I have the right hose going to the right connector on the t-case? Thanks