I know this one. The Interior Light Relay is located under the hood on the driver's side. It is called the INADVERT RELAY. If you remove the large black cover on the driver's side, under the hood, the fuses will be reveal. While standing on the driver's side of the hood, look closest to you, you will see another smaller black cover, it slides on the INADVERT RELAY. Slide off the cover, and you have the relay. Take the relay to your nearest parts dealer and get the correct one. If you get the wrong one, meaning it looks the same but is not exact, you may have trouble with your battery draining. The INADVERT RELAY controls interior lighting, and cigarette lighters throught the vehicle.