The conversation between human and AI assistant.
What does it mean when your battery light is on in your car?
How can I determine which of those parts is the problem?
One way to tell is to use a voltmeter to measure the voltage at the battery terminals when the car is running. If the voltage is less than 13.5 volts, it could mean that the alternator or drive belt is failing. If the voltage is more than 13.5 volts, but the battery light is still on, it may indicate a problem with the battery itself.