Electrical Issues? Why It's More Likely to Be Your Alternator Than Your Battery

Although some modern cars will alert their driver to a problem through a generic 'check engine' light on the dashboard, others may be more specific when they have some type of electrical problem. In this case, an icon that looks like a battery will glow red to prompt you to take action. Maybe car manufacturers should think of updating this icon, as it may force you to come to the wrong conclusion. After all, your battery may not be at fault at all, and it could be something else. Where should you look if you're in this position right now?

Stop Blaming the Battery

Of course, your car will not go very far without a fully functioning and capable battery. This is a very competent power storage unit that provides a tremendous boost in order to kick start the engine. However, it is a fairly simple device by itself and relies on a much more important component in order to function. In fact, it's quite possible that your challenge relates to a faulty alternator, and this is where you should focus your attention.

The alternator is a generator that's initially powered by the engine and helps to top up the battery whenever the vehicle is in motion. If it did not provide this service, the battery would quickly run out and fail, while your car would glide to a halt by the side of the road. You may be able to jump start the vehicle with the help of a friendly motorist, but you will be unable to start the vehicle once again as soon as you turn off the ignition.

How Does This Work?

Inside the alternator sit a number of diodes and other components that help to alternate and regulate power. They will deteriorate with age as they are affected by heat, and when this happens, the alternator will begin to lose capacity. The alternator is in turn connected to the engine pulley, to spin a rotor at high speed and generate its power. This rotor has to sit on special bearings, and these will definitely wear out with use.

Tell-Tale Signs

If you've recently noticed a screeching or squealing noise when starting the vehicle, this may have been a sign of alternator issues. However, you can check its current state when you jump start the car.

Turn on the headlights and then apply power to the engine while the vehicle is stationary. If the headlight glows bright and then dims in concert with the revolutions of the engine, this is a sure sign that the alternator is on its last legs.

Getting It Replaced

In most cases, you will need to replace the alternator as one unit for either a new or reconditioned version. However, this is a job that is best left to a mechanic. Contact your local mechanic to learn more about car servicing.