I am hooking up new climate control switches because when I got the car they were broken. Sadly the previous owner didnt fix anything correctly and when i took it out of the dash all the vacume lines were disconnected. I used this diagram posted by jrichker (i love you) http://www.veryuseful.com/mustang/tech/engine/images/Mustang_AC_heat_vacuum_controls.gif and I found what to do with everything but one line. It is another yellow line but with a bigger connector on the end of it. Also there is a large vacume port right under the electrical connector, does anything connect to it? And a sixth (not numbered) at the bottom of the vacume block under the #5 port. Just to rant anyone know why you have to wait 30 seconds between searches?