In the process of replacing a light in the truck, all my interior lights stopped working. To be clear: My Instrument cluster lights up and works, the radio, the AC control, work also. My turn signals are fine but seem to be running at a lower power, the head lights and turn signals work. What does not work is the map and dome lights, and then my third brake light with the cargo lamp, and the courtesy lights in the door panels. I checked all my fuses with a mult-meter and they all beep out fine showing the signal is going through. I made no changes to any grounds and confirmed that my grounds are fine. I heard about some sort of switch in the doors that might trigger the courtesy lights? not sure about that and never touched it. I am kinda lost at this point.