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Why your Brake Light Keeps Coming on and off While Driving

Driving safely isn’t just about obeying the speed limit and staying aware of other drivers. It’s also about having important vehicle features in top condition, especially your brake system. Brake lights are one of the leading indicators that alert other drivers to the fact that you are stopping or slowing down. If your brake light keeps flickering on and off while driving, it might be time for a brake inspection to check for faulty brake mechanisms or brake pad wear. It’s important to remember that failing brakes put you at risk when on the road and other motorists around you.

Have you ever been driving along and noticed that your brake light keeps coming on and off while you’re behind the wheel? If so, you’re not alone! This is a common issue that affects many drivers, and it can be confusing to figure out what is causing the brake light to turn on intermittently. Let’s take a look at some of the possible causes of this issue. 

Faulty brake switch

One of the most common reasons why your brake light may be coming on and off is because of a faulty brake switch. A brake switch is a device many cars use to alert the driver when the brake has been activated or released. It plays a critical role in monitoring brake system pressure and alerting the driver when it detects an issue with the brake system. So if your brake light keeps coming on and off, it is likely because of a malfunctioning brake switch. 

To test for a faulty switch, you can try pressing the brake pedal and releasing it multiple times to see if the brake light comes on and off. If this happens, it’s likely due to a faulty brake switch that needs replacing. You can also use a multimeter set to ohms (Ω) to check for continuity in both directions. You should also check for voltage loss and corrosion. If either of these is present, it’s likely time to replace your switch. 

Low brake fluid level

Another possible cause of your brake light coming on and off intermittently is low brake fluid levels. For your brake system to work properly, there must be adequate brake fluid at all times. The brake fluid helps transfer pressure from the brake pedal to other system parts, such as the calipers or wheel cylinders. So if you are experiencing issues with your brakes, you should check your brake fluid levels.

Simply open the reservoir under the hood and check the fluid level with a dipstick. If it is low, refill the brake fluid to avoid any brake system issues. 

Worn brake pads

If your brake light keeps coming on and off while driving, it could also be due to worn brake pads. Brake pads provide friction between the caliper and rotor when stopping or slowing down. If they are overly worn, this can cause issues with braking performance and brake lights turning on and off intermittently. Inspect your brake pad regularly wear (at least every 10 000 km) to ensure that they are still in good condition. Otherwise, they may need to be replaced to avoid any brake system issues. 

Faulty brake caliper

In addition to brake pads, brake calipers can also cause brake lights to come on and off intermittently. The brake caliper is a vital component in the brake system as it houses the brake pads and helps apply pressure when stopping or slowing down. If the brake caliper is malfunctioning or has become stuck, it won’t be able to generate enough friction between the rotor and brake pad, thus resulting in brake light flickering on and off while driving. You’ll need to have your brake calipers inspected to determine if they are faulty or not.

Malfunctioning brake line

The brake lines transport brake fluid to the calipers and wheel cylinders. If there is an issue with them, you may experience the brake light flickering on and off while driving. You should inspect your brake lines regularly for any signs of wear or tear. If you notice any leaking or frayed brake lines, then it’s time to have them replaced to maintain proper braking performance. 

Faulty ABS sensor

Lastly, a faulty ABS (anti-lock braking system) sensor can also cause brake lights to turn on and off intermittently. The ABS Sensor is responsible for informing the brake system when to activate and deactivate to prevent wheel lock-up during braking. If your ABS sensor is malfunctioning, it can cause brake lights to turn on and off randomly while driving – you’ll need to have a qualified technician inspect your ABS sensor to determine if it needs replacing.

If your brake light keeps coming on and off while driving, one of its components may have an underlying issue. You must inspect each component regularly to ensure proper brake system performance and safety. If any of the above mentioned issues are present, be sure to address them immediately to avoid further brake system problems. By keeping up with regular brake system maintenance and inspection, you can help ensure your brake system is in peak operating condition.

Providing reliable transportation to customers is our goal at The Auto Warehouse. Low credit scores, bad or no credit, no problem. The engine of our business is integrity and respect. This is how we have achieved our impressive reputation of buying here, paying and paying here in recent years and it has made us the best qualified dealer selling used cars in Aurora, Chicago, Cicero, Melrose Park, Waukegan, and now open in Milwaukee, WI. Visit us to learn more!