Originally Posted by Rolldogg
It's a common issue with the Xcabs. The door latch sensors are located in the bottom of the Xcab doors and easy to replace. The WD40 is a bandaid fix, sooner or later they'll need to be replaced.
you cant replace just the switch. the switch/ latch and inner door handle come as an assembly. the switch is built into the door latch. when my truck first started doing the door ajar thing i replaced the latch assembly only to have the door ajar light come on a month later. i sprayed it with WD-40 and it hasnt come on since. that was 3 or 4 years ago.