Everything is fairly tight and I need to disconnect additional connections to allow access to back of panel (my main problem).
OK, replaced black rubber connector piece (can't visually see T section) and still have shutdown issue in OFF mode. this might have been connected and then just slipped off during poking around.
Removed glove box as that is quick. Found another black rubber connector glistening (damn oil). Vacuum line is orange and connects to a metal device(?) Need to drop kick panel to fix but did cap off for now.
Tested system with vacuum gauge inline:
(edit) vacuum gauge inline at firewall inside engine compartment, green/black vac line (edit)
Off = 7"
Auto Lo = 7"
Auto High = 7"
Bi Level = 20"
DEF = 20"
Note: Item #38 shows "Specified leak point" so that might reflect in the measured results???
http://handbook.w116.org/Climate%5C83-604.pdf
Car will shutdown but still takes a few seconds. Pushing DEF engines stops right away. Anyone have info on vacuum levels in different stages of selection via push buttons? By the way...my A/C is disconnected (no belt, no main hoses in engine compartment).