I got the powermaster 150 amp one wire hookup altenator. I guess it starts charging at 1500 rpm. I want to make it so its always a 14.5 volts non dependant of rpm. Does anyone know how to do this? When I first start the car up it charges at 10.5 volts until I rev it up and then it will sit at 14 volts. Im using a painless wiring 18 circuit harness and it has a white wire on it thats suposed to hook up on the altenator. Maybe this is the exicter wire?