After you plug in that blue plug to the headlights and stock harness. What do you do with the brown and grey wires that remain? Just asking; I didn't see anybody say anything about them. I'm assuming that they don't have a use.
They are for the angel eyes and driving lights. I only used the blue plug. the other plug was so cheap that it wouldn't make contact when u plugged it in. So I just spliced it and left the blue plug in place.