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Old 08-22-2020, 12:17 PM   #35
cas3
Senior Member
 
Join Date: Jan 2011
Location: sw minnesota
Posts: 4,574
Default Re: Generator or alternator ?

alternators will whine when charging, usually you can hear it if the battery is down at all. alternators need power to make power. so your wire at the alternator should show battery voltage with the key on. if no power there, it wont start to charge
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