I know this has probably posted numerous times. I have a 2011 Optima that the alternator doesn’t put out. New alt has been installed, it has been bench tested good. Battery is load tested good. You can start the car and turn on loads, only read battery voltage. I have went to the output stud of the alt and only get battery voltage. I know there is a battery monitor on the negative cable, needing information on how to diagnose and repair the system.