Hey let me pick your brains for a minute.

No Climate Contol working at all unless (see Bellow)
1977 MD 300D 123.130

I took one of the Vacume lines under the passender side dash near the fan motor and disconnected it. I then sucked on it and heard a click and blower motor came on.... If I hold suction on the line it stays on and all the climate control buttons seem to work, except the tempeture and compresor switch (compresor works if I jump it off battery). I seem to just be blowing hot. Does this give you any insight into whats going on? Also the left rear passender door window does not work.

Thanks again.
Rich