my question is if my alternator light is on even after i change the alternator and the old one tested good. do u think the battery/alternator relay is bad. And if so, where would that relay be located? its a black box that has a metal bracket with two terminals and a plug in for a wire. the part stores have a piture of it but i cant find it. (rock auto) show a picture. its name is the (battery relay) for a 2004 cadillac escalade esv 6.0 liter. thanks