Toyota Corolla Alternator Not Charging – Any Solutions?

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Toyota Corolla Alternator Not Charging – Any Solutions?

Hey all,

I think my Toyota Corolla’s alternator is not charging properly. The battery warning light keeps coming on, and the battery keeps draining even after a fresh charge. I’m wondering if anyone has dealt with a similar issue and what the solution might be.

Could this be a faulty alternator, o r is it something else in the charging system?

Would love to hear your experiences!

Qalb E Momin asked on 29 Jan 2025 17:26:48 pm

1 Answer

31 views |

Car Mechanic Expert - on 29 Jan 2025 17:29:44 pm

It sounds like your alternator might be the culprit, especially if the battery warning light is on and the battery drains despite a fresh charge. A faulty alternator can fail to charge the battery properly, causing the battery to deplete.

To confirm:

Check the Voltage: Use a multimeter to measure the battery voltage with the engine running. If it’s below 13.8 volts, your alternator may not be charging the battery.
Inspect the Alternator Belt: Ensure the belt is tight and in good condition, as a loose o r worn belt can affect the alternators ability to charge.
Test the Alternator: Some auto parts stores can test the alternator for you, o r you can have a mechanic run a diagnostic.

If these tests point to the alternator, it will likely need replacing. If everything looks fine with the alternator, the issue could be with the battery, wiring, o r another component in the charging system.