Hi Bob,
yes, all the locks except on the gear shift assembly and hood are vacuum operated. The yellow lines running from the top of the CLP are vacuum lines. I think the way it works is by using a diaphragm and spring - to lock, a vacuum is generated in a particular line, and a plunger connected to a lever is pulled down opening the lock. When the vacuum is released, the spring pushes the lever back up (it maybe more complicated than that - there could be stable positions on the plunger, door locks have manual overrides, etc..). I think the pump goes on if the vacuum leaks out. You might have a different issue in that a vacuum line may be broken. I don't know which locks are on which vacuum circuits - the service manual might help.
-Jerry