I got a set of Matsushita Gen3 ballasts and need some help with the wiring. I am using relay harness with extra fuses and need to know which wire is positive? One wire is White the other Yellow. I have Gen4 ballasts, but those are red and black, pretty obvious. After looking at them, I think the white wire is positive, but want to be sure. If anybody can help with telling me which wire is positive, white or yellow. Would really help. thanks everybody