I fixed mine
Thanks for the WD-40 idea.
I used it on my Edge this weekend and fix the stupid dinger and door ajar light.
Beats the heck out of slamming the door to try and fix it.
Spray the door latch on the inside of the door. Just hose it down.
Please be aware that WD-40 is a solvent not a lub, so it my flush out the necessary lub.
2003, F250, Super Duty, Super Cab, 7.3, Auto, 4X4 Silver, 2" lift in front only, 46 gal fuel tank, Billet Grill, 285X75X16 BFG MT, Bilsteins, Firestone Air Rear, B&W Gooseneck, We call it the "Silver Knocker"