Overcome by Weather and Other Events. Based on what I've seen so far: 1. No sucking/hissing sound under hood or in the dashboard area. 2. The Black vac supply line is clear of the Battery. I've seen these lines get crushed on a TBird we had, and replacing the battery was the cause. 3. It's really a good diagram, shows the function of the Select Switch (valve) in various positions. 4. I find the description of Vacuum Tank (where it's located and how to access it) very confusing. All this is crammed into a van-style dash/instrument panel/HVAC compartment area. Behind an Air Bag, too. It's gonna be hard to trace much of that Black Hose, but I'll get after it. 5. I'll come up with a vacuum source and verify the servos will change modes with that temporary vac source. 6. Was hoping all I had to do was access the Switch and source a replacement. Ahhh... Thanks!