Remove the two screws from the latch assembly on the side of the door.
How to change security door lock.
Use a phillips head screwdriver to unfasten the two or three screws located on the inside knob plate.
You may also need to use a wire tool or a paper clip.
Do not skip this last step.
Remove the screws from the old lock on the inside of the door.
Remove the strike plate on the door jamb as well.
Most electronic locks come with two screws that you need to remove from the inner part of the door.
The most comprehensive method of ensuring security it involves removing the existing lock from the door including the handle if it s a handle lock combo and then installing.
Then remove each side s door knob by pulling them away from the door.
Check the back part to find the screws that are holding on the back cover.
If your new lock is the same brand and model as the old one you may be able to keep your existing latch plate and strike plate.
Remove the latch assembly doorknob.