What is the reason why the car battery light is on? What should I do if the battery light is on?

The battery light on the car instrument is on, indicating that there is a problem with the car battery. The yellow light indicates that the battery is insufficient or out of power, which will cause the car to fail to start. At this time, you can use the powered device to start and run for a period of time to store electricity; after restarting, the yellow light will disappear and the battery will return to normal . If the red light is on, it is not just a battery problem, but a fault in the power supply system. At this time, it is recommended to turn off the electrical equipment in the car and call for help.

Reasons for the battery light

1. If the voltage generated by the motor is lower than the battery voltage, the generator does not work or the power supply line fails, the car battery light will turn on. At this time, you should go to the repair shop to overhaul the generator and charging circuit.

2. The battery light on the dashboard is a warning light that the generator is not generating electricity. Generally, it will light up after turning on the ignition switch to the ON position, and it will go out after starting the engine. If the light is still on after starting the car, it means that the generator may not be generating electricity, or there may be a problem with the line, and it needs to be checked and repaired at the maintenance station.

If the generator does not generate electricity, the electrical equipment can only be powered by the battery while the car is running, and the battery will not be charged. When the battery is exhausted, the flame will be turned off or the car will not start.

3. If the car battery is low, the battery indicator will also light up. However, you can continue to use it in this case. Because the battery can be charged by the internal generator of the engine when the car is running.