zoegrant,
If you are referring to the inside door lock. If everything in your door hooked up correctly, you should be able to push your door handle the opposite way of when you open your door. It should lock your doors. If you are refering the outside door locks. Back in the day, the factory used to only install a door lock on the passenger side. Anyway, that is how my 53 3100 was setup. Hopefully this helps you out.
Rugo
