hi there i have a probleme whit my 1986 monte carlo ss my control module for the a/c and positions of the vent doe not work i disconnected the vacum hose and i am getting no air leaks or no vacum anyone know where it gets its vacum source on the motor?? where do i have to connect it so it works ??? i know its a platic purple hose next to the heater box in the engine bay but where doe it have to be pluged in thanks in advance for you help!!!