Why is my battery light still on after replacing battery and alternator?

Similarly, there are two things that generally cause a battery warning after an alternator replacement. The most common is, again, a loose connection either with the control plug (aka “relay” plug-in), charging line connection, or the ground.

What does it mean when your brake light and battery light come on at the same time?

The battery light will come on when the event that the battery is no longer being charged. The ‘E’ brake (parking brake) light comes on when the fluid is low in the master cylinder or there is a pressure difference in the brake system. Have the alternator checked and see if the battery cables are tight.

What does it mean if the alternator warning light stays on after the engine has been started?

What the alternator warning light means. When you start the engine, the car will check to make sure the alternator is outputting the correct voltage. When the light stays on, it indicates that the computer has detected an issue with the charging system.

What happens when an alternator goes bad in a car?

The alternator plays a vital role in supplying power to the car’s AC, recharging the battery and ignition. When your alternator is faulty, the battery power is drained fast, and you will find yourself with a stalled car. But what can cause the alternator to go bad?

Can a negative battery test a bad alternator?

Some may recommend running the engine with the negative battery cable disconnected to test the alternator. However, this is not a good idea because it could damage the electrical system of your vehicle and cause greater problems. Fixing your battery or alternator can be an expensive repair.

How can I tell if my alternator is draining my battery?

Another way to tell if an alternator is draining your battery is by running your car and unplugging the battery’s positive connection. If the car immediately stops running, your alternator has malfunctioned because it should depend on the alternator and not the battery after starting. Another simple way is to test your interior lights.

Why does my alternator make a weird noise?

The next in the list of bad alternator symptoms is weird noises. After operating for quite a long time, the serpentine belt could have stretched and may not be spinning the alternator pulley efficiently, resulting in a lack of charge. Typically this leads to a weird sound.

What are the warning signs of a failing alternator?

The Warning Signs of a Failing Alternator. Indicator Lights. Most modern cars have a dashboard warning light to alert you to a problem with your alternator. Typically this light is shaped like a battery, although some warning lights may display GEN (for generator) or ALT (for alternator).

What does it mean when your alternator stops charging the battery?

Indicator Light On. Usually, the first sign that your charging system is in trouble is a “battery,” “ALT,” or “CHARGE” warning light illuminating on your instrument panel while driving. It means that for some reason, the alternator has stopped charging the battery and your car is running on battery power.

Why does my alternator warn me when I start the car?

As the alternator ages, it won’t be able to maintain a constant voltage and any fluctuations will be detected by the car’s computer. When you start the engine, the car will check to make sure the alternator is outputting the correct voltage.

What should I do if my alternator keeps dying?

The alternator is essentially a generator and it keeps your battery charged while supplying additional electrical power for the other systems in the vehicle. If you have a new alternator and your battery keeps dying on you, then there’s definitely a problem that you’re going to need to look into.