What Causes the Car Battery Light to Illuminate?

1 Answers
LaCaroline
07/25/25 1:52am
The battery light turning red indicates a malfunction in the vehicle's charging system or power supply system. Below are the specific reasons for the battery light turning red: Engine Fault: A loose alternator belt or tensioner pulley can cause the power supply system to stop working, resulting in the battery light illuminating. Battery Connection Fault: Severe oxidation or looseness of the battery terminals can lead to poor contact, causing the battery light to illuminate. The solution involves cleaning and tightening the battery terminals.
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