the dome light will come on when I open 3 out of 4 doors. When I open the passenger side front door the dome light will not come on. When this happened in past cars I would look for that little plunger in the door jamb and replace it and then the dome light will work. I dont see any plungers in my truck. Where is the switch located? What is the P/N of the switch? How do I replace the switch?