Just discovered this vacuum line today that's been unhooked for I don't know how long.passenger kicked it more than likely. The line is orange and is inside the cab right next to the resistor, here's a pic below what is this for ? All I did was plug it back in and now it idles high. If someone can identify this thing for me and tell me where a good place to start tracking this .I have been having an issue with the blower Motor fuse blowing out when I slide the lever on def/or AC. I haven't got much experience with vacuum leaks, if I see a cracked hose I replace it . Thanks guys for any help!
(this is a 1990 xj 4.0l AW4 renix