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why do my brake lights not turn on

by Dr. Mara Stoltenberg III Published 3 years ago Updated 2 years ago
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Some of the most common reasons that your brake lights are out or malfunctioning include:

  • Problems with the brake light switch
  • Issues with the brake light switch circuit – usually a ground
  • Brake light bulbs that have burned out
  • Brake light socket has gone bad or are corroded
  • Turn signal switch defective

If one or more of your brake lights aren't working properly, it could mean one of three things: The brake light system fuse is blown, the brake light bulbs are burned out or the brake light wiring switch is broken. All these issues are easy to troubleshoot.Jun 23, 2022

Full Answer

What causes my brake lights to stop working?

There are three things that could lead to this issue:

  • Faulty brake light bulbs.
  • The brake light wiring switch is damaged.
  • The automobile has a broken brake light system fuse.

How to fix your brake lights?

The Reasons for Brake Lights Not Working but Tail Lights Are

  • The Light Bulbs. Blown out light bulbs are the most common reason for why the brake lights not working but the tail lights are.
  • Fuse Box and Light Switch. You have to find the fuse box or the power distribution center (PDC). ...
  • The Electrical Ground. ...
  • Check the Wiring. ...
  • Examine the Turn Signal Switch. ...

How can I get my brake lights to turn off?

How to Fix Brake Lights that Stay On

  1. Check the Brake Switch. The switch for your brake pedal should be found under the dash, right by the pedal. ...
  2. Inspect the Brake Pedal Stopper. There’s also a stopper in play that needs your attention. ...
  3. Check Brake Pedal Spring. The brake pedal spring is located under the pedal. ...
  4. Look for Corrosion or Debris. ...
  5. Inspect Electrical System. ...
  6. Talk to a Mechanic. ...

What to do when your brake warning light is on?

What to Do When Your Brake Warning Light Comes On

  • The emergency brake may be on; release the brake to solve the problem.
  • Your car's brake fluid may be low. ...
  • Your car may be experiencing a brake system failure.
  • If your car has an antilock brake system (ABS) and your ABS warning light does not go out, have your car checked immediately. ...

More items...

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Is there a fuse for brake lights?

Like all fuses, the brake light system fuse can be found in the power distribution center, which is under the dashboard or tucked away underneath the hood.

Why does my brake light not come in when I brake?

The most common reason your brake lights are not working but tail lights do is a bad light bulb. It can also be caused by a blown fuse, bad brake light switch, or issues with the wirings. Your vehicle's taillights are working fine, but the brake lights don't come on when you press the brakes.

Why does my tail light work but not my brake light?

There are actually a number of reasons why your tail lights could not be working but your brake lights are, including: Bad tail light fuse. Bad tail light bulbs. Socket failure.

How can you tell if a brake light fuse is bad?

0:427:21Car or Truck Brake Lights Not Working? How to Diagnose Tail LightsYouTubeStart of suggested clipEnd of suggested clipThere is two little contacts that you can just touch. And as long as the light lights up on bothMoreThere is two little contacts that you can just touch. And as long as the light lights up on both sides. Then you know that fuse is good and when you're doing this it's a good idea to have the key.

Can I drive without brake lights?

If your brake light is out, drivers may not be able to tell and it could cause a collision. It is illegal to drive with a brake light out - so as soon as you're aware that one of your brake lights is faulty make sure to fit a new bulb straight away.

How much does it cost to fix a brake light switch?

How Much Does it Cost to Replace the Brake Light Switch? A replacement brake light switch generally costs around $30 to $75, depending on the make and model of the vehicle. Getting a brake light switch fixed at a shop will add typically $80 to the repair.

Do tail lights and brake lights use the same bulb?

On many vehicles, the tail lights and brake lights share the same bulb. One filament inside the bulb is for the tail light and the other filament is for the brake light. There are also some vehicles that have a separate bulb for each circuit.

How much is a brake light fuse?

And finally, if you want to fix the fuse of the affected lights or change it, the average cost will amount from $50 to $150.

How do you check brake lights?

Put one end of the floor brush/ mop on the brake pedal. Alternatively use what ever you are using to engage the brake pedal. Push down until the brake is engaged and then lock in place so that the pedal remains pushed down. Go around the back of your car and check the lights.

How do you tell if a fuse is blown?

Remove the fuse from its holder. In some cases you may need a small screwdriver to unscrew the fuse holder cap. Look at the fuse wire. If there is a visible gap in the wire or a dark or metallic smear inside the glass then the fuse is blown and needs to be replaced.

Do all 3 brake lights have to work?

Answer: The state statute says that a vehicle equipped with stop lamps or signal lamps shall at all times be maintained in good working condition. So all brake lights, including the third one, would have to be operational when activated.

How can u tell if a car fuse is blown?

2:443:34How To Check Car Fuses-How To Tell If They're Blown - YouTubeYouTubeStart of suggested clipEnd of suggested clipBut it is completely separated so the metal piece on the inside.MoreBut it is completely separated so the metal piece on the inside.

What happens if brake pedal switch is broken?

If the switch is bad, the brake lights won't operate and the transmission shifter will not come out of the "Park" position. In cars with a push-button start system, a faulty brake light switch can cause the vehicle not to start. Often, the brake light switch could be sticking and work intermittently.

Why does my brake light come on and then go off?

A red light that flashes on and off could signal low/almost empty brake fluid, but also a serious issue with the brake's hydraulic system. If the light comes on and stays on, you could end up with a potentially catastrophic (and costly) brake failure.

How much is a brake light fuse?

And finally, if you want to fix the fuse of the affected lights or change it, the average cost will amount from $50 to $150.

How would a driver know that a brake light bulb is not working?

They would notice the brake pedal getting softer under pressure. They would notice the brake pedal become firmer under pressure. By standing at the rear of the vehicle and getting another person to turn on side lights.

Why is my brake light switch not working?

It could happen due to a loose connection of the wire or the corrosion or damage of the wire ends.

Why won't my brake light respond to my turn signal?

The brake light circuit can be a part of the turn signal circuit in some vehicle models. The brake light won’t respond if the switch is damaged or bad. Check the switch’s wiring diagram and find the single wire that establishes a connection between the brake light and turn signal switches. Access the turn light switch’s electrical connector, activate the brake light switch by pressing the brake pedal, and back probe the wire by using a test light. If the test light is not on, you have to change this wire.

Why are my rear lights not working?

The causes for dysfunctional rear lights are: Burnt bulbs. Blown out fuse. Damaged wiring. Electrical issues.

How to change brake light wire?

Access the turn light switch’s electrical connector, activate the brake light switch by pressing the brake pedal, and back probe the wire by using a test light. If the test light is not on, you have to change this wire.

Why are tail lights important?

Both brake and tail lights are crucial for road safety. If any of them does not work, other drivers behind you won’t see if you are moving or not. It can cause severe accidents, especially on dark streets or during heavy rain and snow. The cops will also flag you if they see you are during without functioning lights.

How much does it cost to replace a brake light bulb?

Lucky for us, a brake light is quite cheap compared to other car parts. It is always a minimal cost for replacing the brake light bulb. A bulb costs from $5 to $10 and the charging process costs $20, so the maximum price will be around $30.

What happens if your traffic lights don't work?

If any of them does not work, other drivers behind you won’t see if you are moving or not. It can cause severe accidents, especially on dark streets or during heavy rain and snow. The cops will also flag you if they see you are during without functioning lights.

How to fix a brake light that is blown out?

How to fix them? Remove the screws from the bulb’s conglomeration. You can go through the trunk and find the exact location. Push the bulb’s switch and turn them out from the socket counterclockwise.

Do you need to replace taillight bulbs?

Mostly, you need to replace the bulbs if the bulbs are turned darkened, or you’ll see the filaments are blown. You will find the same bulbs from the market with the same features and wattage. Search them on Amazon if necessary. Some European cars have original specifications of the tail and brake lighting. Even though the European bulbs are structured with double filaments, you can replace them easily from a reliable store.

Do brake lights have a fuse?

Yes! You’ll understand it very easily. Check the brake light switch. Is it good? Then, your lights are not illuminated due to the brake light fuse.

Can I drive my car with no brake lights?

Indeed, the brake lights are not used for drivers’ safety but to indicate the passengers or ongoing vehicles about the safe run. You can drive your car without brake lights, although it is unfair or illegal in some states.

Why won't my brake lights go off?

Faulty Brake Light Switch or Sensor. This is the most obvious reason your brake lights won’t go off. When the switch inside the brake system isn’t working right, your lights can’t turn off. The switches and sensors in a braking system are responsible for telling the lights when the pedal is up or down. If either of these is defective, the lights ...

What to do if brake light is defective?

If this brake component is defective, you want to replace it, which should cause your brake lights to work normally again. You can also try to adjust the brake pedal switch if it has an adjustment and if it looks like it is engaged, even if the brake pedal is released.

What happens if you can't get the brake pedal to come back up from the floor?

If you can’t get the brake pedal to come back up from the floor, the lights are not going to go off. The pedal must come back to its original position for the switch to close and the lights to cease working.

What is the purpose of the switches and sensors in a brake system?

The switches and sensors in a braking system are responsible for telling the lights when the pedal is up or down. If either of these is defective, the lights are receiving the wrong message.

What is a quick check on brake lights?

Perform a quick check of the brake lights, pedal and lines in between to ensure nothing has been affected by corrosion, leaves, dirt or other contaminants.

How to check if a light bulb is the wrong type?

Check the socket if you can see two circuits or one, and then check the light bulb. Replace the bulb if it’s the wrong type.

Where is the brake pedal spring located?

The brake pedal spring is located under the pedal. If you kneel down on the driver’s side, you should be able to see it. If this spring has lost its tension and can’t return back to normal, the brake system remains engaged, which causes the lights to illuminate.

What happens when you turn off the tail lights?

When the tail lights are turned off, and you apply the brakes, current goes through the brake light bulb, can't find its path to ground, but finds an alternate path doubling back through the tail lights, over to the front running lights, through them and then to ground at the front.

How many volts does a tail light have?

When the tail lights are on and you apply the brakes, 12 volts is seen on both sides of both bulbs. The difference in voltage is 0 volts, so the bulbs go out. The ground is listed as "B7" and is shared with the license lamps.

Do brake lights work when headlights are on?

Brake lights do not work when headlights are on. I was pulled over the other day by a Sheriff who informed me that my brake lights were not working properly. I discovered that the brake lights work just fine when the headlights are off, but when I turn on the headlights they do not work properly.

Why are my brake lights not working?

A poor or broken brake light ground connection will result in the brake lights not working, or power cross-feeding through the tail light circuit, which will keep the tail and brake lights from operating at the same time.

Why is my brake light on?

The most common reason your brake light might be on is the parking brake is engaged or broken, low brake fluid, your car needs new brake pads, or your brake light bulbs need to be replaced.

Why does my dashboard light have a brake light?

Additionally, a problem with the anti-lock brake system (ABS) could also be the culprit of a dashboard brake light. However, I’d leave the diagnosing and fixing of ABS up to a technician.

What happens if you drive with a parking brake on?

Driving with the parking brake on causes unnecessary damage and wear to brake pads and rotors, so if you suspect the brake itself is the problem, you should try to get it fixed as soon as you can.

What happens if the brake light switch is broken?

If the brake light switch shorts internally, it can cause the brake lights to stay lit, without the brake pedal being pressed.

What does the dashboard brake light mean?

Since the dashboard brake light indicates a problem with the entire braking system, in some vehicles the brake light will indicate worn-out brake pads or another problem with them. A handy feature!

What is the ABS light on a car?

Most modern vehicles have anti-lock brake systems that prevent the wheels from locking up or tires from losing traction when driving in slick conditions. Depending on the vehicle, the dashboard light for this may be a separate ABS light, but it could also be the same as the general brake warning light.

Why won't my brake lights turn off?from roadsumo.com

The most common reason why brake lights won’t turn off is that the brake pedals got stuck in place, or it may just slightly press the switch. It is also possible that dirt and debris got stuck between the brake light switch and the pedal. It can prevent the lights from turning off.

How to fix a brake pedal that is not working?from roadsumo.com

You have to grab an old toothbrush and give the contact points between the switch and the pedal a good scrub. This can help in removing most of the dirt and debris. After cleaning, give the brake pedal a couple of good pumps to return to its normal position.

What happens if the return spring doesn't hold the brake pedal back?from roadsumo.com

If the return spring can no longer hold the brake pedal back, it would be like you are riding the brakes all the time. Have your brakes checked, and make sure that the pads and the rotors are still in good condition.

What is a stopper on a car?from roadsumo.com

The stopper prevents the brake pedal from going too far down when you step on it. These are usually made of hard plastic material. They can get worn down after some time due to regular use. Sometimes, they even get a bit loose and get pushed off their original position.

Why are my brake lights on constantly?from roadsumo.com

If your car’s brake lights are constantly on, then the most probable cause is that the switch is stuck or malfunctioning. You will either need to adjust the switch or replace it if it is seriously damaged. If you ignore the problem, you will most likely face serious issues later.

What happens if you don't fix your brake light?from roadsumo.com

Here are some of the things that may happen if you don’t fix your malfunctioning brake light: 1. Drain the Battery. This is the most common issue you would run into if you leave your brake light. The problem is that the brake lights could remain lit even when the engine is off.

What happens if your brake light switches are broken?from roadsumo.com

A Broken or Faulty Brake Light Switch. If the brake lights remain on even when you turn off your car, then the switch that turns it on may still be engaged. Many vehicles share the same design for positioning the brake light switch.

How to remove stop light bulb?

Remove the light fitting and remove the stop light bulb, push in and twist anti-clockwise.

What happens if you put a single bulb on a twin holder?

Mistakenly fitting a single bulb to a twin holder connects the tail light circuit to the stoplight circuit. So when you turn on the headlights, you have brake lights too. Repairing this error is a simple fix.

What is a tail light?

Tail light bulbs come in two main categories, single filament or double filament. A single filament means the bulb has only one circuit, and a double filament means it has two circuits, simple enough, right? Each circuit controls a light, so the double filament bulb has two separate lights inside one bulb.

What is a twin bulb?

The twin bulbs have a bayonet style fitting, push in and twist to fit/remove. Pins at the base of the bulb connect with the bulb holder. The pins are offset to prevent incorrect bulb fitting. Many of the off set bulbs will fit in the tail light bulb holder back-ways with a little motivation.

Can a twin bulb be faulted?

The twin bulb is a marvel, no doubt, but it’s not without fault. It is possible for one of the bulbs internal filaments to touch off each other, leaking power from the headlight circuit into the brake light circuit.

Can you fit a single bulb into a twin bulb holder?

Fitting the wrong bulb is an easy mistake to make, the bulbs are the same dimensions, and so it’s possible to get a single bulb into a twin bulb holder. I’ve done it loads of times…..Schhh.

Can a single stop bulb be incorrectly fitted in a tail light holder?

It’s also possible a higher output single stop bulb has been incorrectly fitted in the tail light holder. See the codes below.

Why won't my brake lights turn off?

The most common reason why brake lights won’t turn off is that the brake pedals got stuck in place, or it may just slightly press the switch. It is also possible that dirt and debris got stuck between the brake light switch and the pedal. It can prevent the lights from turning off.

Why is my brake light not working?

It means that you have to press the device to open and close the circuit physically. Over time, wear and tear could deteriorate the mechanism of the switch, making it malfunction most of the time.

How to fix a brake pedal that is not working?

You have to grab an old toothbrush and give the contact points between the switch and the pedal a good scrub. This can help in removing most of the dirt and debris. After cleaning, give the brake pedal a couple of good pumps to return to its normal position.

What happens if the return spring doesn't hold the brake pedal back?

If the return spring can no longer hold the brake pedal back, it would be like you are riding the brakes all the time. Have your brakes checked, and make sure that the pads and the rotors are still in good condition.

Why are my brake lights on constantly?

If your car’s brake lights are constantly on, then the most probable cause is that the switch is stuck or malfunctioning. You will either need to adjust the switch or replace it if it is seriously damaged. If you ignore the problem, you will most likely face serious issues later.

What happens if your brake light switches are broken?

A Broken or Faulty Brake Light Switch. If the brake lights remain on even when you turn off your car, then the switch that turns it on may still be engaged. Many vehicles share the same design for positioning the brake light switch.

What is the spring on a brake pedal?

This spring is responsible for pulling the brake pedal back to its original position when you take your foot off it. If the spring is not as strong as it used to be, then it may not have enough force to hold the brake pedal against the brake light switch to turn it off.

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