Well, I checked the actuation of all of the doors from the cannon plug with a mighty vac pump and all the doors moved right around 8"HG, in spec with the manual, though I don't have an electric vacuum pump to test per the manual. I wasn't able to figure out how to test the switch its self without an electric pump, but everything is working from the switch. I gave the switch a little Alabama Rebuild and reinstalled. I'll test it on the road tomorrow and go for a new switch if it doesn't work properly.

Van's has the switch for 94+9.75shipping. Best price I've found so far.