Why wont your Ford Expedition courtesy lights turn off?

If your Ford Expedition's courtesy lights won't turn off, it could be due to a faulty door switch that thinks a door is still open. Additionally, there might be an issue with the vehicle's lighting control module or a malfunctioning timer. Checking the position of all doors and ensuring they are securely closed can help. If the problem persists, it may require further inspection by a mechanic.