krewzlo
+1y
You can't go by the colors if you are using a 4 wire for reference. For some reason 2 of the colors have to be switched to make it right. I don't know what brainiac came up with it but I have a chart in the garage I will try to remember to bring it up to the house tomorrow and let you know what each one does. I don't think the center is ground though. I think it is the second accessory wire for things such as winch or something like that or for reverse lights. The ground is one of the outside ones. I only use 6 of them on mine and that gives me everything needed, brakes, heavy gauge 12V, ground, tails, l turn, right turn. White is ground, not black.