If your Ford Ranger is equipped with an automatic door locking system, you can disable the chime that sounds when you open the door by following these steps:
1. Open the door of your Ford Ranger.
2. Locate the door lock switch on the driver's side armrest.
3. Slide the switch to the Unlock position. The indicator light above the switch should turn off.
4. Exit your vehicle and close the door. The chime should no longer sound when you open the door.