5 Signs of a Bad Alternator

Published on

December 28, 2023

mechanic checking the warning signs of a bad alternator

An alternator is an essential component of your car's charging system. It converts mechanical energy from the engine into electrical energy, which is used to power the vehicle's electrical system and recharge the battery. But like any other part of your car, an alternator can go bad for a number of reasons.

5 Signs of a Bad Alternator

1. Dead Battery


A dead battery is one of the most common signs of a bad alternator. If your car's battery keeps dying or has trouble holding a charge, it could be an indication that your alternator is failing.

2. Dimming Headlights


If your car's headlights are dimming or flickering while moving, it could be a sign that your alternator is on its way out. The alternator may not be generating enough power to keep the headlights and other electrical components functioning properly.

3. Strange Noises


A failing alternator can make strange noises, such as whining, grinding, or squealing. These noises are often caused by a worn-out or loose belt, or a failing bearing in the alternator.

4. Warning Lights


If the battery warning light or the alternator warning light (if your car has one) on your dashboard comes on, it could be alert that your alternator is bad.

5. Electrical Problems


If your car's electrical system is malfunctioning or not working at all, it could be a sign that your alternator is failing. This can include issues with the radio, power windows, power locks, or any other electrical accessory within your car.

What to Do if Your Alternator is Failing

If you suspect that your alternator is failing, we invite you to our auto repair shop. At GreatWater 360 Auto Care, we can diagnose the problem and replace the alternator if necessary. Otherwise, driving with a damaged alternator can be dangerous, as it can cause your car to stall or lose power while it is in motion.