Hello All have a problem with mx5 alternator, will not charge, removed old unit and had tested came back u/s and fitted new bosch unit, still no charge. told by mazda that this is ecu controlled. any ideas on testing this, or location for a wiring diagram gratefully received. mazda "not allowed to release tech info" c--p. Have fitted new earth, have battery feed to main terminal, and 12volts to plug.Help! ATB Nev