Trying to debug an alternator problem and would appreciate some pics. Aircraft is a 1976 M20F with a Hartzell ALY-8520 alternator.  Alternator was removed during our recent annual and sent to a repair shop for IRAN, due to significant electrical noise that did not seem to be caused by loose connections.  The alternator shop reported they "found a broken wire" internally, and that the alternator was full of grime (mostly oil leaked from the motor).  Broken wire was supposedly fixed and every