Dead Alternator vs Dead Battery - Which is to Blame?

amzn.to/3WPyRnA - New Car Battery
amzn.to/3WV82y8 - New Car Alternator
amzn.to/43N4WNr - All-in-One OBDII Scanner
How can you determine whether the problem is with the alternator or the battery, and how can you avoid replacing the incorrect part?
Timecode:
00:00:00 - Short intro
00:00:26 - Signs of a Bad Alternator
00:01:13 - Signs of a Dead Battery
00:02:10 - How to Test?
00:02:53 - Conclusion
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