Alternator or Voltage Regulator Problem

[BeerDude]

I had my battery light come on while driving and tested the battery and alternator. The battery was fine, so being cheap, I decided to just replace the voltage regulator. After replacing it, I have a god awful noise coming from the voltage regulator, and the battery light is still on. It's definitely not a belt squeal. Here's a short video:

https://drive.google.com/open?id=0B3...WNVejBvc1hBVlU

Maybe I didn't install it right? Seemed pretty straight forward...

[wagongang]

While you're driving does the battery voltage ever jump up? My light would come on while driving but voltage would spike sometimes. Better yet and alternator tested fine. I replaced the alternator with one I had lying around and it worked fine.

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