I have a 1998 F150. When the temp outside gets above 90 F then the Interior lights and bed light stay on. I even have had trouble with door locks and lights at the same time. What should I be looking for to fix this problem? Please help!!!

 

There's a common problem with interior lights and door ajar indicator in dash, when the doors are shut.

Spray WD40 inside the door latches to fix the problem I am referring to.