That's what I was thinking but I haven't been able to find that wire yet.In case you havent messed with the headlights yet the headlight is a single filament bulb. High beam comes from a shutter inside the headlight assembly that changes the angle of the beam. You would probably have to tap into the wires to the shutter. I just wired mine to a seperate switch. I was thinking of adding it to the gigh beam switch as well but haven't gotten around to it.