I have attempted 3 times to switch this Alternator under Oreilly’s Lifetime warranty and every single one has whined. It sounds like a bad alternator diode whine. It’s not the hum/whine of a bad bearing. Pulleys have been changed. Power Steering Flushed. Grounds cleaned. Big 3 Upgraded power wire and grounds installed. Nothing has fixed it. When doing the multimeter diode tests you see here on YouTube on them they fail to keep the voltage only going one direction. What exactly is O’Reilly selling us here? Anyone have any suggestions of what to try next? I’m at a loss.
