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What does it mean when the plus and minus light is on in a car?

1 Answers

VanMila

07/30/25 9:03am

When the plus and minus light is illuminated in a car, it indicates that the generator's output voltage is lower than the battery voltage, and there is a fault in the power supply circuit. Common warning lights in cars and their causes include: 1. Tire Pressure Warning Light: A yellow symbol featuring an irregular circle that is not closed at the top, with four small spikes at the bottom and an exclamation mark inside. This light indicates abnormal tire pressure, and the tires should be checked promptly. 2. Engine Coolant Temperature Warning Light: This light usually stays on when the car is first started. It will illuminate if the coolant temperature is too high or too low. Some vehicles have a temperature gauge on the dashboard where the needle moves up or down with the coolant temperature. If the temperature is too high, stop driving immediately and wait for the temperature to normalize before heading to the nearest 4S shop or auto repair shop for inspection. 3. Oil Pressure Warning Light: This light is shaped like a "kettle" on the dashboard. It illuminates when there is an abnormality in oil pressure. When starting the vehicle, the oil pressure light will turn on. If the oil pressure is normal, it will turn off shortly after. If there is an issue, the light will remain on. 4. Brake System Warning Light: This red icon features two "brackets" on either side with a circle in the middle containing an exclamation mark. It indicates a problem with the brake system, such as low brake fluid level or the handbrake being engaged.

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