Ok I put a rear window in my duster and it has the grid on it for defrost . I got a switch for it of ebay . Now I go to look at wiring diagrams to figure out how to wire it with no luck on the back of the switch I has three prongs and one wire for light . Prong one is marked . H, prong 2 is L,and 3 is B, how do I wire this thang ?
