Back to all

Alternator Facts (Failing Alternator)

March 31, 2024

If you notice that your headlights are flickering at night, that's something to pay attention to. While there could be many different things that could cause that problem, one possibility is your vehicle's alternator.

The alternator takes mechanical energy from the engine and turns it into electricity, in essence a generator.  The current it makes charges the battery and supplies power to the vehicle's electrical systems.  An alternator is made up of several different parts: a pulley, magnets, coil wires, brushes and a voltage regulator.  While your vehicle is running, these parts get a good workout and, after time, they begin to wear out.

Other symptoms of a failing alternator include your vehicle's lights dimming, the power windows going up and down more slowly than they used to, your power seats not moving quite as fast as before. 

Another sign of a worn out alternator is engine stalling.  Vehicles with fuel injection require a certain amount of power, and when an alternator is going bad, your engine could stall because the alternator isn't cranking out enough of it.

An alternator on its last legs can also fail to charge your battery properly.  Sometimes your battery isn't getting enough charge from the alternator and will go dead.  It also can be the opposite problem. The battery is getting too much power and will cause the battery to get hot.  Your vehicle may give you a clue on the instrument panel.  If you see any of these warning lights, take note: Check Engine, ALT, CHARGE or one that looks like a picture of a battery.  If that light is on, it's time to have your service facility give it a look.

As mentioned earlier, there are other components of your vehicle's electrical system that can fail, such as a worn out serpentine belt or a malfunctioning voltage regulator.  A reputable service facility has diagnostic tools to pinpoint the causes of your problems. And when your issues are fixed, your electrical system will be back to its hard-working self.  You'll get a real charge out of it!

Mustang Automotive
1600 E State Hwy 152
Mustang, Oklahoma 73064
405-745-4826
https://www.mustangautomotiveinc.com/

Need Service?

Request a Quote

More articles from Mustang Automotive

Change Your Wiper Blades Twice Yearly at Mustang Automotive

June 21, 2026

Because 90% of our driving decisions are based on visual information, unobscured vision is paramount. Which brings us to the topic of today's Mustang Automotive article: wiper blades. While this isn't the most exciting automotive subject, it's important. You wouldn't drive at night in Mustang wit... More

Economics of Maintenance for Mustang Auto Owners

June 14, 2026

Buying a new car in Mustang is always a big financial decision. The allure of that new car smell is powerful, to be sure. But what if your current car is still in good shape? How do you decide?People in Mustang who've been used to driving a new car every three to five years may be having second... More

Steer Right in Mustang

June 7, 2026

Virtually all vehicles come with power steering, so many Mustang drivers have never driven a car or truck without it. Power steering assists you when you turn your vehicle steering wheel. Without it, it would be very hard to steer. Now this power assist comes in a couple of forms. In recent year... More