2011 Chevy Impala 3.5 Over Charging? Alternator replacement.

Customer complaint is her Impala was shutting down on her while driving and a few other issues, lots of blown fuses and blown headlight, not sure exactly what constitutes an over charge condition but I thought 15.3V was a little high so did a few continuity checks and voltage drop test and decided to replace the alternator this video is a little bit of footage of me working on it when I remember to record 🤦🏼‍♂️ so it bounces around a little bit.