Door ajar light
I'll tell you what I did. I figured that if one of them was bad, it would be the one that is used the most, the drivers door. So, I went and bought the switch and replaced the one in the drivers door and it worked. The switches are pretty inexpensive and not real hard to change out. Each side of the truck has a different switch, so when you buy one, it will only fit one side of the truck. Hope that helps out. Good luck.