Question about 1998 Oldsmobile Aurora

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Charging system keeps killing alternaters what is the proplem

Changed altenater lasted one day then killed my battery

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Most likely the battery was bad before replacing the alternator. Usually one can cause the other to fail. If you have a bad alternator and it's been charging the battery with low voltage for some time, the new alternator can actually "kill" the battery. If the battery is older, usually I replace it when replacing the alternator.

Posted on Aug 03, 2008

  • Patricia Layton
    Patricia Layton May 23, 2014

    okay...same issue with alternator here and I had both replaced together...what else could it be?



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My car quit while highway driving; now it wont restart. could this be an alternater problem?

The alternator only keeps the battery charged. So if the battery is dead, then yes the alternator could be at fault.
If the engine cranks but does not start, then the alternator is not involved.
And the anti-theft system would not kill the engine, only prevent it from starting.

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The battery kept dying. Buying a new one did not work. Now it will not start after being charged then turned off. Could it be the alternater? Another question, can I put one in my self?

Yes, sounds like alternater.Most cars run off battery and the alternater replaces the voltage your using.If alternater is not putting out the car will kill battery very quickly.If you have some basic tools you can change this out yourself.If you have a digital voltmeter to verify the alt is putting out you can charge battery read battery cold,start car and read battery voltage with car running should be between 13.2 to 14.5 volts DC.If battery is reading 12 volts and dropping rapidly,your alt is shot.

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Ate up a battery, we replaced the alternater and it still is killing batterys.

Check the charging system, first. Measure the battery voltage with the ignition off, then with the engine running. The voltage should be 1 - 2 volts higher with the engine running if the system is working. This is just a quick check. If the charging system is OK, then check for electrical leaks.

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Flat batary

Do you drive it everyday? Does it have any extra stuff on it like alarm system, anti-theft device? Get one of those floaty ball things that check the specific gravity of your battery acid. One dead cell is a dead battery. They will tell you a lot. And just because a battery is new doesn't mean it is good. I have seen a lot of good batteries dead! Also, check the water in the battery. also, check the alternator, it can't be charging. The light on? Something is killing your battery. If it isn't being drained, it isn't being charged up either. The clock can kill a battery in a few days. Check this stuff out. Hope it helps.

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If the vehicle stalls when you pull the battery cable loose from the battery the alternator can not be good because the car would stay running. You have an issue with the charging system, Possible voltage regulator which is in the alternator. Have the alternator taken of the van and tested a the parts house.

Sep 27, 2009 | 2002 Ford E350

1 Answer

Its kills alternater, its charges good until I

Sounds to me like you have a grounding problem Have you had the transmission loose lately because there is 3 ground wires on one of the bolts if it is not tight you endure the systems taqht you are speaking of. Check it before you do anything else and it wont cost you a dime. I was told the alternator went bad. I had to replace it again and it isnt the problem. Check Your Ground

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Car battery keeps draining while running charge light staying on just replaced alternater and battery

Test Voltage @ the back of alternator, and all grounds to body and engine.

If you have 14+ @ back of alternator but 12 @ battery the wire off the back (Im talking abought the single larger one) may be broke

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