on the honda side, green is ground, blue is high and white is low. I have used the parts unlimited lights before, but can't remember the colors, what I do is find a battery and some clip leads or wire (or you could play musical plugs on the atc while it's running) and find the ground first, its probably green or black, ground one of those wires then touch the positive to another wire on the headlight and see if it lights up, and if it's the high or low, if both high and low light up you have the wrong ground, try the other wire
F.U.2 RACING
Atc90, bandito frame
Atc185 x2
82 250 (300 kit)
83 250R
200ES Big red
Atc200X (with lifan motor)