Quote:
Originally Posted by qwerty
The master switch simultaneously applys vacuum to one circuit and vents the opposing circuit.
The reservoir vacuum bleeds down each time the door lock configuration is changed.
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Thank you for that information. The implications then have become:
- A sitting car will eventually lose all of the vacuum in the reservoir by simply switching the door lock system from lock to unlock and unlock to lock repeatedly (I believe I have seen this mentioned before).
- A single circuit is not expected to hold vacuum over a long duration; there is no need for it.
This second point is critical; to be fully functional a single circuit only needs to hold vacuum long enough that the entire circuit can switch from one state to the other.
MAYBE...
It suddenly occurred to me that it is possible that the master switch, when placed into a position (either lock or unlock) continuously supplies vacuum to the appropriate circuit. Is this true, or does the switch only supply vacuum for a short period of time in order to change states?