ok, i have a replacement actuator and need a little help. i swapped in the replacement and now when i lock the doors the replacement actuator works, but there is a mechanical rattle for about 3 seconds after the lock is pulled down, as if the actuator is still firing after the lock is down, but then stops. no noise when i unlock. again, the locks do go up and down, but it seems as if the actuator is still firing when the locks are shut. did i get a bad actuator, or are the wires screwed up or something else? thanks.