First step open electrical box and ohm green wires to the lightning coil. Wiggle stator wires also while ohm testing, have seen it ohm good and not charge because stator wires were bad to the coil. Always remember the charge coil does not charge the battery the lightning coil does. If coil ohms good 1.1 to 1.4 then swap out a voltage regulator and test that it's charging before putting electrical box together.