Diesel Truck Forum - TheDieselGarage.com - View Single Post - Alternator Warning Light Issues
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post #5 of (permalink) Old 12-20-2012, 05:09 AM
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You need to actually have them test the alternator. There is a lot more to it than just how many volts it is putting out. Most of the time the alternator will still put out voltage, but the regulator is bad. Only an actual alternator test will pick this up.

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