There are a number of reasons why your door might not lock. You could have something stuck in the door for example.
The answer is a key
The power locks can only be engaged from the driver's door. You press down on the door lock on the driver's door and it will lock all the doors. Or you turn the key in the lock to the right in the door lock of the driver's door and it will lock all of the doors.
Slide the card through the slot where the lock is by the door. Set the card where the lock would be. Now open the door.
Begin by removing the inside door panel on your 1997 Plymouth Grand Voyager. Remove the door lock linkage. Remove the door lock retaining bolts. The door lock will come out.
You will have to remove the door panel. And it will be mounted over by the door lock on the inside of the door.
Hold door handle (opening lever) as if you're opening the door and then push lock lever to lock
Take out the "Door lock fuse".
What? Barn door lock on a Yukon????
If the door lock on a 2003 Saturn Ion is pushed into the door, it can be fixed by removing the inside panel of the door. Then the lock can be placed where it needs to be and secured in place.
You can open a key lock on a door knob, or you can open a deadbolt lock on the door itself.
The best way to test a door lock is to locate the wiring for the door lock usually in door boot or kick panel. Use a test light with a probe and poke each wire until the door lock is activated. How ever be sure to they are not vacumm locks
Remove the drivers side door panel of your Mercedes-Benz. Remove the door lock assembly retaining bolts. Remove the door lock linkage. The door lock assembly will come off.