If you are talking about the courtesy lights, then with the main power switch on, you just tilt the lens up or down. If they still do not come on then you probably need to pull them and clean the oxidation on the brass wheels and contacts. To pull the lens and contact assembly, I use a small screwdriver and insert on the end between the outer body and the lens assembly, and while prying gently the lens assembly will come out a bit, repeat on the other side and pull assembly out.