What Keeps Killing My Alternator?

What keeps making my alternator go bad?

Alternators put out alternating current, and the battery needs direct current to charge, so there is a voltage rectifier that converts it, and it can suddenly go bad, too.

Dust and dirt can get into the alternator, and over time cause shorts or wear on the brushes..

Why is my alternator killing my battery?

Bad Alternator Diodes An alternator with a good diode allows current to flow in one direction. A bad diode can leak and allow the current to flow in the opposite direction. When this happens, it may keep the charging circuit on after the vehicle engine is shut off, which will cause the battery to drain.

Will bad battery kill alternator?

I believe that in general a battery does not necessarily kill an alternator. If a battery is low on charge, the higher voltage output (around 14v) will charge the 12.6 volts your battery is supposed to have. Therefore, an uncharged battery is nothing more than an additional load on the alternator when below 12.6 volts.

Do alternators fail suddenly?

The alternator is a key component in running the electrical systems in your car. … When your alternator begins to fail it can cause a variety of different electrical problems in your car, and eventually cause a breakdown. Alternators can go bad suddenly, or slowly over time.

What are the signs your alternator is going out?

If you have a bad battery, here are some of the symptoms you may encounter:Engine Doesn’t Crank or Start. … Engine Barely Turns Over. … Dim Lighting. … Engine Starts and Stays Running When Jumped. … Dim or Overly Bright Lights. … Discharged Battery. … Alternator Noise. … Electrical Issues.More items…•

Can you jumpstart a car with a bad alternator?

Yes, you can jump start a car with a bad alternator. … Anytime you jump start a car you are charging the battery as well. Also, the battery is rarely completely dead, just too dead to crank the engine, but it probably still has enough power to run the engine once it is started.

How do you tell if it’s your battery or alternator?

A simple test to check the working of the alternator is by running your car; and then unplugging the positive connection of the battery. If the car stops, then you most likely have a problem with the alternator. Another simple test is to check your interior lights.

What is the average cost to replace an alternator?

$400Waits says the average price to replace an alternator with a remanufactured one is $400, while Gunning adds that a remanufactured alternator on a typical, domestic car, costs about $300 to $500, including parts and labor. The price of a new alternator can run from $500 to $1,000.

What can kill your alternator?

“your car needed a new alternator, and this battery cable needed to be replaced also.” Running in full charge mode continuously can kill an alternator, so trying to have your new alternator try and charge your dead battery can result in immediate alternator failure.

How long will a car run without alternator?

Essentially though if your alternator gives out, I’d say you have anywhere between 10-30mins before you’re stranded with a petrol engine.

How long can I drive with a bad alternator?

Starting with a fully charged battery you will probably get 100 Miles before it wears down too far. It also depends greatly on not running headlights or running lights. If you have a car that always runs with the headlights on, and if your battery is several years old, 50 miles might be a better estimate.

Will AutoZone install alternator?

No, they don’t replace them for you. However, if you need yours tested, and can remove it yourself and bring it in, they will test it. Depending on the vehicle, changing the alternator may be pretty quick and simple.