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Replaced Battery, Warning Light Still On

(1999 Ford Taurus)
in Whitewater, WI on July 11, 2014
I was driving home and noticed my battery warning light was on. My accessories started to dim so I shut everything off and made it home safely. Once I tried to start my car again it would not start. First I tried to give my car a jump but no luck. Next went to purchase a new battery and once installed my car started no problem.

I did notice the battery warning light was still on, flickering. After driving a short distance I noticed the battery warning light was steadily on. While my car was idle, I accelerated and noticed the battery warning light would go off once I reached 4RPM or higher.

I have examined my alternator belt and don't find it to be lose or cracked so I am not sure what is causing my battery light to still be on as I know my alternator is responsible for charging. I am hoping to find a solution to my problem.
Displaying 4 answers & 2 comments
Popular Answer
on July 11, 2014
Replace the alternator.
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on July 11, 2014
new doesn't always mean working. take it to an auto parts store for free testing
on July 11, 2014
Replace the alternator
on July 11, 2014
Also check the plug and harness going to it for heat damage and replace 'pigtail' if needed.
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Sounds like an alternator. We recommend taking it to a reputable shop and having the charging system tested to verify the problem. Feel free to call us or stop in. Advanced Auto Clinic @ 1101 Ann St. in Delavan. 262-728-2944.
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on July 11, 2014
it's pretty obvious your alternator is not charging the battery
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