ok - I'll ask another way
is there another circuit board between the pushbutton console and the damper door vacuum solenoid valves and if there is where is it? I noticed during troubleshooting that it looks like the vacuum solenoid valve that controls the defrost damper door does not allow vacuum through when there is no power to the solenoid. I did check the resistance through the vacuum solenoid and it is not shorted. I will probably try to put power to it over the next few days and see if it switches.
What should the "normal" state be for these vacuum solenoid valves? Should the vacuum path be clear to the damper door actuator when there is no power on the solenoid?
I really want some cold air blowing out of the two center vents when the a/c is on instead of the defrost slot at the windshield.