Why is the engine battery fault light on?
2 Answers
Engine battery fault light may be on due to the generator output voltage being lower than the battery voltage, generator not working, or power supply circuit failure. Here is some relevant information about engines: 1. Concept: An engine (Engine) is a machine that can convert other forms of energy into mechanical energy, including internal combustion engines (reciprocating piston engines), external combustion engines (Stirling engines, steam engines, etc.), jet engines, electric motors, etc. For example, internal combustion engines usually convert chemical energy into mechanical energy. 2. Classification: Internal combustion engines, external combustion engines, external combustion engines, meaning the fuel burns outside the engine, gas turbines, jet engines.
As an elderly driver, I've encountered the battery light coming on several times, and I know it's usually not a minor issue. It indicates a problem with the charging system—perhaps the alternator isn't performing well, or the battery itself is old and depleted. The alternator acts like the car's charger, using a belt-driven mechanism to supply power to the battery; if the belt is loose or broken, charging stops, and the light turns on. Ignoring it for too long can drain the battery completely, potentially causing the car to stall, especially dangerously on highways. My advice is to pull over safely when the light comes on: open the hood to check if the belt is still tight and inspect the battery terminals for corrosion. If you know how to use a multimeter, measure the voltage while the engine is running—normal readings are between 13-15 volts, and anything below 12 means immediate repairs are needed. Regular battery maintenance can prevent this issue, especially for batteries older than three years—they should be replaced. Remember, safety comes first—don't risk major problems over minor neglect.
