[Norbe66stang]

ok i try to lock my mustang through the outside with the key and it doesnt work when i am inside the car i lock it but as soon as i close the door the car unlocks i have no cluie how to lock it?! anyone have answers or ideas?

[66Sprint200]

It sounds like the lock rod has come unattached from the exterior lock cylinder. The reason you can't lock it from the inside, and then shut it is a safety feature, so that you can't lock yourself out of your car.

[sixtsixstang]

You may have to remove the door panel and visually check the locking mechanism. Make sure all rods are attached and not in a bind.