need help on this please many may know that on there tach there are 4 wires (red) for power (black) for ground (white) for the light and there is the green one for the - side of the coil what i want to know is what wire do i hook this to from the avenger (i4--420a) and where is it located is it one on the coil or what thanks for help[sm=gears.gif]