pull the gauge from the pod...there should be a black nuby looking thing on the back with 2 wires coming from it...a white wire and a black wire...twist it to the left and it comes out. then you pull the bulb out, replace it with new one...put it back in the hole and twist it to the right. i can show you pics of my temp gauge one in the morning if you want me too...its just too cold outside right now to go out and take pictures.