Sometimes car trouble hits you at the worst time. You’re late for a meeting, turn the key, and instead of the engine firing up, all you hear is: click, click. 

Is it a dead battery?

Or is it something else? 

Today’s average vehicle is made up of more than 10,000 parts. One piece works together with another to make your entire vehicle possible. But when one part goes bad, it can impact many others. 

That click, click might not be your battery. It might be the alternator instead. 

What does an alternator do?

Have you ever experienced being stranded on the side of the road with a dead battery and had no idea what went wrong? If you are nodding your head yes, then you might have experienced a failing alternator. 

Whether you are driving a brand-new or an old one, your alternator plays a pivotal role in keeping your car running smoothly. It’s responsible for keeping the battery charged while driving; if it fails, it can cause several problems for your vehicle. 

An alternator generates electricity to power your car’s electrical system and recharge the battery. It is connected to your car’s engine through belts and pulleys to create energy when the engine is running. The alternator sends power to the battery, which keeps the car running and powers the headlights, stereo, and other accessories.

The warning signs the alternator is failing

Without a properly functioning alternator, your car’s battery would quickly drain, leaving you stranded on the side of the road. Understanding the signs that your alternator may be failing can help you address the issue before it becomes a significant problem.

Dashboard battery light

Have you ever noticed a dashboard warning light that looks like a battery? That’s the alternator warning light. If it comes on, it could mean your alternator is failing. If the alternator is not producing enough voltage, the battery will not be able to recharge, causing the battery light to come on. If you notice this light illuminated while driving, addressing the issue promptly is essential to avoid further complications.

Headlight trouble

If your headlights are dimming or flickering while driving, it could be a sign that your alternator is failing. The alternator provides power to the car’s electrical system, including the headlights, so if it’s not functioning correctly, the headlights may have trouble getting enough power to shine brightly.

Other electrical problems

When an alternator is on the verge of failure, you may experience various electrical problems throughout your vehicle. You might notice that power windows are slow, the radio cuts out, or the power locks don’t work correctly. Other common signs include the gauges on your dashboard not working correctly or the AC blowing warm air. If you notice any of these problems, you should take your car to a mechanic for an inspection.

Strange smells

Another sign of a failing alternator is a strange smell coming from the car. If you smell burning rubber, this could indicate a worn-out alternator belt. If left unchecked, it can cause severe damage to the alternator and other parts, leaving you stranded on the side of the road.

Dead battery

If your car won’t start, and the battery is completely dead, it might not be your battery. A dead battery is often a sign that the alternator is not recharging and needs to be replaced. If you frequently need to jump-start your vehicle or if your battery dies unexpectedly, it’s essential to have your alternator examined.

Difficulty starting

If your car struggles to start, it could indicate a failing alternator. The alternator provides the necessary power to start your car, and if it’s not working correctly, the vehicle may struggle to start. You may also hear a clicking noise when turning the key, indicating that the alternator is malfunctioning.

Engine stalling

A failing alternator can cause your engine to stall while driving. As the alternator loses its ability to provide sufficient power to the electrical system, the engine may shut off unexpectedly. This can be a dangerous situation, especially if it happens while you’re driving at high speeds. If your engine stalls or frequently cuts out, it’s essential to have your alternator checked to prevent potential accidents.

Odd noises

A failing alternator may produce grinding, whining, or squealing sounds. These noises can occur due to worn-out bearings, loose belts, or internal mechanical issues within the alternator. If you hear any abnormal noises from your engine, especially when accelerating or using electrical components, it’s crucial to have your alternator inspected by a professional.

What to do if your alternator is failing

If you notice warning signs of a failing alternator while driving, finding a safe place to pull over and turn off the engine is crucial. Continuing to drive with a failing alternator can lead to a complete loss of power and potentially cause accidents.

Open the hood and visually inspect the alternator belt for any signs of damage, such as cracks, fraying, or looseness. If the belt appears worn or damaged, it may need to be replaced. However, keep in mind that modern vehicles often have serpentine belts that drive multiple components, including the alternator. In such cases, it’s advisable to seek professional assistance.

Check the battery terminals for corrosion or loose connections. Dirty or corroded terminals can disrupt the electrical flow and mimic alternator issues. Clean the terminals with a battery terminal cleaner and ensure they are tightly secured.

Use a multimeter to check the voltage of your vehicle’s battery. A healthy battery should read around 12.6 volts when the engine is off. If the battery voltage is significantly lower, it may indicate that the alternator is not adequately charging the battery.

If you’re uncomfortable diagnosing or repairing the alternator, it’s best to consult a qualified mechanic or automotive technician. They have the knowledge and tools to accurately diagnose the issue and recommend the appropriate repairs or replacements.

Remember, a failing alternator is not a problem that should be ignored. Without a properly functioning alternator, your vehicle’s electrical system will eventually fail, leaving you stranded. Regular maintenance and prompt attention to warning signs can help you avoid unexpected breakdowns and costly repairs.