What does it mean when a car displays a red battery light?

[AlexAnn]

When a car displays a red battery light, it indicates the generator warning light. This light should illuminate when the key is turned on and turn off after the engine starts. If it remains lit while the engine is running, it means the generator is not producing electricity and requires immediate repair. A generator is a mechanical device that converts other forms of energy into electrical energy. There are various types of generators, but their working principles are all based on the laws of electromagnetic induction and electromagnetic force. There are many possible reasons for generator failure, with common causes including: 1. Broken generator belt; 2. Open circuit in the wiring or damaged generator regulator, which can also lead to generator failure. The specific cause needs to be checked at a professional auto repair shop.