[speeder]

Exactly. Just go around the beast w/ your vacuum pump and test each actuator. There is no hiding a busted diaphragm in a simple device like these. Connect the vac pump to both nipples of each actuator, (lock and unlock), they should move the lever or shaft in the indicated direction and then hold vacuum in the fully extended (or withdrawn) position. The reason that these components fool some people is that they can be shot but still function, (lock or unlock the door/trunk/fuel door), they just will not hold vacuum once they do that little task.