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After I lock the doors with the key, all four door locks pop open after 45-60 seconds. During the short period that the doors are locked I hear a wirring sound comming from the back seat of the car. I do not recall if this is a normal sound or not. I think I have a vacuum leak somewhere or the pump under the seat is malfunctioned or has a leak near by to it. Could it also be the locking vacuum actuators on each door? I am trying to start out with a simple plan before I find it necessary to take the door panels off.

Thanks,
Shimmey
Stillwater, Minnesota
 
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