i am workin on a 2020 ic with psi motor when ever i turn the ac on the voltage drops fast i tried using only on ac and it drops slow if i use both it drops fast it vurned up an alternator i checked all grounds and powers cleaned all connections still no change i started eliminating blowers and condensor fans everytime i do that it just slows the drop but still loses voltage i ran a new man power from ac boards to battery no change any ideas