BigDave12768

I am having the defroster issue. I can get the defroster to some what work if I mess with controller ****. I can get it to switch from panel to Floor/Defroster. And some times full defrost. So its not a broken door or any issue internaly I am guessing. So I bought a new a controller. But its a different revision. So when I plug it in it blinks. They said you have use a scan tool to make it work. Anyone know how to do this? will a snap on scan tool work?