Place your head near the frame and tap it with the end of a screwdriver until you hear the sound change.
How to install new door key lock.
Install the new deadbolt assembly so that the keyhole is on the exterior of the door.
Insert the pins and reassemble the lock.
Dump out the old pins insert the new key and use tweezers or small needle nose pliers to match the new colored pins to the color code on the special instruction sheet.
Push the spindle through the latch and push the keyhole side onto the spindles.
6 test the deadbolt to make.
Insert the new bolt into the opening on the edge of the door and fasten it to the door with the provided screws.
Mark each screw hole.
Mark the spot on the frame.
Once the new pins are in reverse the steps to reassemble the lock.
Insert the exterior part of the lock into the door by feeding the long metal piece through the opening in the center of the bolt.
Insert the new lock assembly into the door with the slanted side of the lock facing the direction that the door swings closed.