The alternator is a crucial part of your car, responsible for charging the battery while the engine is running. Without a working alternator, your car will die as soon as you turn off the ignition. But how can you tell if your alternator is problematic before it leaves you stranded? Fortunately, there are several warning signs to watch out for.
Dim Lights
One of the most common signs of a failing alternator is dim lights. If you notice your car’s lights dimming, especially when the engine is idling or you’re using other electrical devices (like wipers or the heater), it could indicate a problem with the alternator. The alternator may not be producing enough power to supply all the electrical systems.
Battery Symbol on the Dashboard
Most cars have a battery-shaped indicator light on the dashboard. If this light comes on, it’s a clear sign that there’s a problem with the battery charging, and the most common culprit is a faulty alternator. Don’t ignore this sign!
Engine Starting Problems
If you’re having trouble starting the engine, especially after the car has been sitting for a while, this can also be a sign of an alternator problem. If the alternator isn’t charging the battery, the battery will drain, and the car won’t be able to start.
Clicking or Whining Noise
Some alternator failures can produce clicking or whining sounds. These sounds are usually heard when the engine is running and could indicate a loose alternator belt or damage to the alternator itself.
Low Battery Voltage
You can check the battery voltage using a voltmeter. The engine must be running during the measurement. The voltage should be between 13.5 and 14.5 volts. Lower voltage indicates a problem with the alternator. This is a more precise check than the previous ones but requires slightly more technical knowledge and equipment.
Burning Smell
In some cases, a failing alternator can produce a burning smell. This is a sign of a serious problem and requires immediate attention. Do not drive the car if you notice this smell.