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hey y’all! We got a 6.4 the alternator went out, so we replaced the alternator. After replacing The alternator, the battery light comes on and stays on. So we thought maybe a new bad alternator. Swapped it again. Still doing the same thing. What voltages do we need to be looking for? Or do y’all have any ideas? Engine code is P0626-FF. Can’t find any chaffed wires. Two new batteries. And a new alternator.
 

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Fully charged good Battery’s should be around 12-12.5v with key off. Greater than 12v and less than 15v when running. Alternator should maintain battery’s at 14.4v in a perfect world.
 
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