Hey thanks...just to clarify. I did all my testing with a MityVac at the door. So i know all the lines/actuators work because i can make them go/stay up or down this way. However, when i test the switch itself, it hisses off vacuum as soon as the pin is pulled out (door unlocked i think). It makes sense to me it should be a closed vacuum circuit--ie, that vacuum is just routed to the lock/unlock lines with no loss. Must be the switch!

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Mike
Vancouver, BC
'79 300td 60k miles!
import from Japan