I don't know what make you have, but my manual says the white wire has a power output of 7+ v. They say to hook the two kill switch wires to the two wires from engine to coil (cap off the white if not used for accesories) Then hook one wire (any color from kill switch) to one wire to coil, the other wire from kill switch to the other wire to coil. I hooked mine up useing one wire from kill switch to blue wire on coil, the other wire from kill switch to chasis (ground) It works, but it is still wrong to create a direct short! If there was a kill switch that worked like a refridgerator door switch (closed when out, open when pushed in) That would be the te way to go!!!