My 04 GC decided the other day to start blowing only from the defrost and the cruise control also wont set. From what I've read this has something to do with loss of vacuum pressure. I've browsed all over the internet though and can't find a thread that shows where exactly to look or how to find a leak in my hoses or where my vacuum canister should be. I think I found the hoses but I'm not sure and when I looked behind the passenger-side bumper for a canister I found nothing.

Could someone help please?

 

The vacuum cannister in your WJ is located behind the passenger side headlight.
It's #2 in this diagram.

 

After checking, there were different locations for that. Read this thread. I got that diagram from it but there are more locations shown later. http://www.jeepsunlimited.com/forums...d.php?t=524283

 

Great! I was tracing the tube back from the canister and it turns out it was just unplugged from the engine. I was looking at the wrong tubes! Thanks Blue!

 

Blue, Too bad your not getting paid for all this A/C help!

 

No problem.
I'm just trying to help.