ONE MORE THING: THere are THREE wires, the BROWN one is the ground. Make sure that one is at zero volts at all times, that is, it's grounded.
If it is not grounded/zero volts, then there is no change of state being reported to the CLP/SSM.

Now, if the door is REALLY not locking or unlocking, I'd blame the mechanism. Your "manual mouth test" is not really a test - other than you seemed to prove that, no matter what the pump does, the lock does not move. I think your lock mechanism in the door is bad - that is, the pneumatic mechanism is bad.