Why Is My Battery Light Flashing?

by Phil Borges // in Car

If you own a car, chances are you’ve seen the battery light come on at some point. This can be a scary sight, especially if you don’t know what it means. So what does battery light flashing mean? In this blog post, we will discuss the different meanings of the car battery light flashing and what you should do when you see it.

What does it mean when the battery light comes on and off?

There could be different causes of battery light flashes on and off. When your car battery light flashes it means that your car battery is low and needs to be charged.

When your car’s battery voltage falls below a certain level, the “battery low” warning light will start flashing. If the light starts flashing while you’re driving, it means that you need to pull over and turn off your car as soon as possible. Driving with a low-battery can damage your car’s electrical system.

If the light is flashing when you’re not driving, it means that you should charge your car’s battery as soon as possible. A dead or weak battery can cause a lot of problems, like a broken starter or alternator.

Another cause of battery light flashing on a car is a problem with the electrical system or faulty alternator/regulator. When this happens you need to get it checked out by a professional mechanic.

Other cause is a loose or corroded battery cable. If the battery terminals are loose, the car will not start or run properly. If there is corrosion on the terminals and cables, you may need to clean or replace them before continuing with your journey.

If you are experiencing any of these issues, it is recommended that you take your car to an auto repair shop and have them check your vehicle for problems before continuing driving with the light on.

The best way to avoid problems like this is preventative maintenance. This means having regular tune-ups done at least once every few months is recommended.

Flashing lights can mean different things for different cars, so it’s important to get the right diagnosis. By catching problems early on, you can save yourself time (and money) in the long run.

How do you fix a blinking battery light?

When the battery light is blinking there are a few ways you can do to troubleshoot the issue.

First, you need to check if all your electrical components are working properly and that there is no excess drain on the alternator due to malfunctioning systems or appliances.

Second, check the battery to make sure it has enough charge and is not defective. A weak battery will cause the light to blink.

Third, if your vehicle has a voltage regulator or other component that controls charging system operation check it for proper function as well.

Fourth, check your battery cables and terminals for corrosion or looseness. It is best to keep these components clean and tight to ensure that they are not the cause of any problems.

Finally, if none of these steps work then it may be time to get a new battery or alternator as both items can often become weak over time due to too many factors such as age or excessive use in hot temperatures which could lead them causing their own issues with the charging system.

If you have checked all of the items above and are still experiencing problems with the blinking battery lights, it is best to take your vehicle to a professional mechanic to diagnose and fix the issue. They will be able to properly test the charging system and find any potential issues that could be causing this problem.

How can you tell if it’s the battery or alternator?

It’s not always easy to tell which of these two components is causing your car to start sluggishly or die altogether, but here are a few tips to help you out.

If your car has been starting up just fine until recently, and now it’s having trouble turning over, the problem is more likely the battery. Try jumping it off with a set of jumper cables and see if that gets things going again. If it does, you can either buy a new battery or have the old one tested and recharged.

If your car has been having trouble starting up for a while now, even when you give it a good jump, the problem is probably the alternator. This part of your car charges the battery and keeps it running while the engine is on, so if it’s not working properly, your car will have a lot of trouble getting started. You might need to get the alternator replaced or repaired.

If unsure it is always a good idea to seek help from a mechanic or take your car to the shop for a professional inspection.

Can I drive with a flashing battery light?

You can drive with a flashing battery light but it is not recommended. The battery light may be flashing because there is something wrong with your vehicle which needs urgent attention.

It could be dangerous if you continue to drive with the battery light on. One is that you could end up stranded on the side of the road if your battery dies. Another is that your alternator could overheat and fail, which would also leave you stranded. And finally, driving with a defective alternator can drain your battery, which could also strand you somewhere. So it’s best not to drive with flashing battery light, and instead have your car checked out by a mechanic as soon as possible. If you are stranded on the side of the road call for a tow truck and have your car towed to a mechanic.


If you’re seeing the battery light on your car dashboard start flickering, it means there is a problem and the battery needs to be fixed as soon as possible. The good news is that this issue can often be resolved relatively easily, so don’t panic if you see the light start blinking – just take some time to address the problem. Thanks for reading our guide to understanding what battery light flashing means – we hope it was helpful.

About the author, Phil Borges

Phil Borges is a battery aficionado. He's written extensively about batteries, and he loves nothing more than discussing the latest innovations in the industry. He has a deep understanding of how batteries work, and he's always on the lookout for new ways to improve their performance.