Remove the handles from the door using a philips head screwdriver.
How to fix my sliding door lock.
You have to remove the handles to see how the small actuator lever enters the latch.
Install the locking.
Pull the cylinder lock from the door as you hold the latch with your fingers to stop it from falling into the door.
Usually its the e2014 but the only way to be absolutely sure is to loosen the two screws that hold the handle on.
First remove the screws securing the door handle in place first with your phillips screwdriver and slide the outer latch lever out of place.
Then replace the bottom screw in the hole where it was affixed to the handle to prevent the latch from falling into the doorframe.
Your lock is most likely the e2014 or the e2013 shown on my sliding door lock page.
Pull the inside and outside handle off the door.
Step 3 removing the screws two screws on the end of the door secure the latch.
Take your graphite pen and insert it into the lowermost screw hole quickly to prevent the latch from falling into the frame.
3 insert a screw driver through.
How to fix a sliding glass door lock step 1.