96 SSEI climate control not switching

First, this is a great forum to learn about my car. Here I thought I was the only one with problems.. My vents will not switch between the floor, dash or windshield. The blower and climate portions work fine. Does anyone know where I can get a diagram of where the vent doors are and what controls them?

I believe behind to the left of the glove box is the motor and acuator arm tthat moves the door.

There is a vacuum line under the hood that runs from the engine, under the air filter assembly and battery tray, over to a canister that stores vacuum for the HVAC controls. It is most likely unhooked or split somewhere causing your issue.