Question about 2003 Chevrolet Astro

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My van looses battery charge. Just put a new alternator, and a new battery in, and now the alternator is not charging the battery . What could the problem be?

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Before the alternator was replaced it was important that the charging current was measured with an ammeter to confirm charging.It is possible that the rectifier/regulator to the alternator is faulty.This electronic control unit determines the charging current.Please check this unit in your car for failure.Check this link for tips.


http://www.fixya.com/cars/r5824824-draining_car_battery_charge

Posted on Sep 29, 2010

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If you have no shorts that are draining the battery you may have gotten a defective alternator. Cheap rebuilt or remanufactured alternators from Mexico are common. I have bought 2 that failed to function right from the parts store. Poor quaility control at the plant. Ask them to check it a Autozone or Advance auto . They do this at no charge. Because of the difficulty and lack of space to work in the cramped quarters of a van. have the parts checked before you pay for it. It stinks when you have to do this once on a van anything more is infuriating. It best to have it tested before you accept the part, and only takes a minute when it is out of the vehicle. Good luck with your van. I will never buy another without having it tested before I leave the store. ever.

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1 Answer

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