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2008 SD 6.4 battery light charging issues

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Old 09-22-2023, 08:57 PM
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Duksrule
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2008 SD 6.4 battery light charging issues

08 6.4 new alternator that’s known good and changed a few times. New batteries and the battery light is still coming on and the voltage is all over the board. If i disconnect both batteries with the truck running the light goes out.

 
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Old 09-23-2023, 06:58 AM
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Long shot but make sure the fan belt isn't slipping.
 
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