Question about Toyota Corolla

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The battery warning light is blinking on and off on my 2001 Corolla. Should I replace the battry or could it be the alternator?

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  • Master
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Hi and welcome to FixYa!

Although the battery sign indicates that you have a faulty alternator, it is wise to have your battery checked first. When tested and the battery sits on BAD then the battery will surely need replacement. If the battery is good then go for the alternator replacement.

Hope this helps and thank you for using FixYa! Have a good one!

Posted on Mar 11, 2011

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  • Toyota Master
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Not sure, usually when the battery light comes on it is charging, meaning that the battery was low. The alt /gen light would mean the alt is not charging. So, depending on what else is happening, will decide what you do. Check the battery, Does it have water in it? Do you have a volt meter? It should read 13+ volts at all times. Do you have a gravity tester? Your electrolytic fluid will tell you if the battery has a dead cell or not. The car will not run without the alt working. Maybe 20 mins max. If the car runs, It must be the battery, but it won't run on a dead battery either. It could be the voltage regulator, or a weak battery. get it checked out. You can take out the alt and get it checked out too before you buy a new one, if the battery is good. Hope this helps.

Posted on Mar 11, 2011

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