got a 2002 f250 crew cab and im having a problem with the door ajar light coming on while driving and beeping. this is keeping all the interior lights on and the bed light anyone have this problem and know how to fix it cause i cant

 

Super simple fix.
Just spray the crap out of the latches with your favorite penetrating lube. If the post on the cab side is wore down wrap it with some electrical tape.

 

Spray the door latch with WD-40 and open and close the doors a few times. This is a common problem. Spray the crap out of them. lol

EDIT: 1 min Jim, 1 min. lol