Why does my brake light only work on one side?

Table of Contents

Why does my brake light only work on one side?

Since the problem is only on one side, you can rule out the fuse and other parts of the circuit that are shared by both bulbs. I would look closely at the connector for the nonfunctional bulb, as it may be damaged or corroded. If the bulb looks OK, you’ll want to test for power and ground at the bulb.

Where is the fuse on the brake light?

You will get the fuse panel under the dashboard and the PDC under the hood. The brake light switch is also to be found under the dashboard and check if its plunger touches the brake pedal arm. Any problem with the fuse box and light switch will affect the brake lights. In case if the fuse is blown, change it with a new one.

Why are the brake lights not working but the tail lights are?

Blown out light bulbs are the most common reason for why the brake lights not working but the tail lights are. Remove the screws from the bulb lens (which you can access through the trunk or see your vehicle repair manual to get the exact location). Push the bulbs and turn them counterclockwise to remove from the socket.

Why are the rear lights on my car not working?

The causes for dysfunctional rear lights are: 1 Burnt bulbs 2 Blown out fuse 3 Damaged wiring 4 Electrical issues

Where is the fuse on my brake light?

If your lights don’t illuminate on either side and your brake light switch is good, then the next thing to check is the brake light fuse. Locate your vehicle’s fuse box, which is usually under the hood or on the kick panel inside the passenger compartment.

Since the problem is only on one side, you can rule out the fuse and other parts of the circuit that are shared by both bulbs. I would look closely at the connector for the nonfunctional bulb, as it may be damaged or corroded. If the bulb looks OK, you’ll want to test for power and ground at the bulb.

Blown out light bulbs are the most common reason for why the brake lights not working but the tail lights are. Remove the screws from the bulb lens (which you can access through the trunk or see your vehicle repair manual to get the exact location). Push the bulbs and turn them counterclockwise to remove from the socket.

Why is my brake light not working on my F150?

The problem we have been seeing is the BCM (Body Control Module), better known as the dash fuse box, has been the problem. There is a micro processor inside the BCM that sends power to each corner of the vehicle for turn signals and brake lights. Below is the wiring diagram for the tail light circuits.

How long does it take to replace a brake light bulb?

How long does it take to fix a brake light? 1 hour. This is the maximum time for brake light bulb replacement since it is not complicated at all. The process should be around 40 to 60 minutes to complete.

Is it illegal to drive without a brake light?

First of all, you will get pulled over and be fined by a police officer since it is definitely illegal to drive without a working brake light. Second of all, other drivers cannot see you very well in the dark. Without brake lights, it is impossible for them to know whether you are stopping or not, so accidents on the road are very likely.

Do you need to change the brake light?

Think of how much time you spend with your foot on the brake, and then consider that the bulb has to be illuminated during that entire period. Newer models have switched to LED lights that last much longer, but older vehicles still feature bulbs that need to be popped out and replaced.

Is the brake light the same as the turn signal?

When the turn signal switch or multi function switch is operated the brake light circuit is substituted for the turn signal circuit for either right or left directionals. European and Japanese cars have a separate light and circuit for the brake and turn signal lights.

Can a faulty brake light switch cause a car to not start?

In cars with a push-button start system, a faulty brake light switch can cause the vehicle not to start. Often, a brake light switch might be sticking and work intermittently. This can cause the Check Engine or ABS system warning light to come on on the dash.

Why are Mercedes parking lights only on one side?

Here’s an incredibly small piece of automotive minutiae you may not have known about: Many Mercedes-Benz models have parking lights that only light up on one side of the car. You’re probably thinking this is because something is broken in these cars, but you’re wrong. It’s intentional. Allow me to explain. First, an overview of how they work.

How does the parking brake warning light work?

It’s activated using a pedal, hand lever or electronic switch, and it keeps your car’s wheels from turning when parked. A switch in the parking brake system turns on the warning light whenever the parking brake is activated and the ignition is on.

What happens when you release the parking brake?

Releasing the brake should turn off the light. Some vehicles will automatically release the parking brake when you shift out of park. RepairPal Tip: Depending on your vehicle, it may have one or more brake warning lights. Some have a separate parking brake warning light, while others may combine several brake-related functions into one light.

Think of how much time you spend with your foot on the brake, and then consider that the bulb has to be illuminated during that entire period. Newer models have switched to LED lights that last much longer, but older vehicles still feature bulbs that need to be popped out and replaced.

How can you tell if your brake light bulb is bad?

Once the socket has been removed it will expose the bulb which may have a burned mark or be light blue in color which indicates a leak in the glass. In either case the bulb is no good. Grasp the bad bulb and pull it from the light socket. Some bulbs you will need to push down and twist counterclockwise.

Can a brake light switch be replaced at the same time?

Replacing the switch is not a big job, and it’s also straightforward for your mechanic to test brake light problems like this one. If all three brake lights are out at the same time, it’s unlikely that the trio of bulbs died simultaneously.

Where is the brake warning light on a car?

When your car’s brake warning light comes on, it tells you something is wrong with the braking system; it can’t be put off or ignored until later—the price for doing so could very expensive and very dangerous. Just about every car, truck or SUV has a series of warning lights located on the instrument cluster of the dashboard.

What does the brake light on the dashboard mean?

Think of the brake light on the dashboard as your best friend who is trying to tell you that you may be driving a car with no brakes. But the warning light can’t deliver its message if it doesn’t work, so be a little proactive and confirm that it is working properly.

Where are the brake lights and left side turn signals?

Your brake lights and turn signals for each side are on one circuit. The left side turn signal and brake light is generally the yellow wire going into your trailer connector. The first thing to do is check the fuses on your tow vehicle. Next, inspect and test the connector at the rear of your tow vehicle with a circuit tester, like # 40376.

Why are my right side brake lights not working?

Starting at the trailer side connector, follow the wires back to the tail lights looking for any sections that are pinched, frayed or damaged. It may be possible that there is a short on the right turn signal and brake light wire.

Your brake lights and turn signals for each side are on one circuit. The left side turn signal and brake light is generally the yellow wire going into your trailer connector. The first thing to do is check the fuses on your tow vehicle. Next, inspect and test the connector at the rear of your tow vehicle with a circuit tester, like # 40376.

Where is the brake light on a tow truck?

The left side turn signal and brake light is generally the yellow wire going into your trailer connector. The first thing to do is check the fuses on your tow vehicle. Next, inspect and test the connector at the rear of your tow vehicle with a circuit tester, like # 40376.

Replacing the switch is not a big job, and it’s also straightforward for your mechanic to test brake light problems like this one. If all three brake lights are out at the same time, it’s unlikely that the trio of bulbs died simultaneously.

Where are the brake lights on my car?

You will get the fuse panel under the dashboard and the PDC under the hood. The brake light switch is also to be found under the dashboard and check if its plunger touches the brake pedal arm. Any problem with the fuse box and light switch will affect the brake lights.

Why is my passenger side brake light not working?

The brake light (passenger side) went out. I replaced the bulb and the other one while I was at it. But the passenger side brake light still doesn’t work. Even tried switching bulbs to use the one that I knew was working on driver’s side, but still wouldn’t work on passenger side. I see that there’s only one fuse control for both lights.

Can a car with a faulty brake light switch be driven?

First, it turns on the brake lights when a driver presses the brake pedal. Second, it sends the signal to the vehicle computer that brakes are applied. A car with a faulty brake light switch is UNSAFE to drive. In most cars, the brake light switch is installed right above the brake pedal. Inside, it has a one- or two-way electric switch.

How can I tell if my brake lights are working?

You will first want to check the fuses on your tow vehicle. Some vehicles could have fuses for operating the turn signals and brake lights of a towing package. You will want to check if they are installed and working properly. The next thing is to make sure the wires on the trailer plug is wired properly to the trailer.

Can a bad brake light cancel a turn signal?

With a bad turn-signal switch, the third-light should still function. On this type system, the turn signals and brakes use the same circuit. When we use the turn signal switch, it cancels the brake light signal, on the side selected.

Once the socket has been removed it will expose the bulb which may have a burned mark or be light blue in color which indicates a leak in the glass. In either case the bulb is no good. Grasp the bad bulb and pull it from the light socket. Some bulbs you will need to push down and twist counterclockwise.

What to do when your brake light has no power?

This portion of the guide is to help you test for power when one, both lower or all three brake lights have no power. Test the Fuses: Use the owners manual or the lid of the fuse panel to find the brake light fuse. Then use a test light to check the fuses for the brake light and BCM fuses and replace if any are blown.

Why is my brake light not working on my Chevy Tahoe?

Replace the turn signal switch. Bad contact inside causing a crossing of the circuits. When the turn signal is applied it should open the brake light circuit allowing for just the signal to work. Doesn’t sound like the switch is doing it’s job. 99 Chevy Tahoe… Rear turn signals, brake lights, and hazards

Where are the brake lights and tail lights?

In most European cars, the same bulb does the job of the tail and brake lighting. However, it has double filaments, allowing one set still working while the other set is burnt. You have to find the fuse box or the power distribution center (PDC). You will get the fuse panel under the dashboard and the PDC under the hood.

Where is the brake light switch on my car?

Fuse Box and Light Switch. You have to find the fuse box or the power distribution center (PDC). You will get the fuse panel under the dashboard and the PDC under the hood. The brake light switch is also to be found under the dashboard and check if its plunger touches the brake pedal arm.

In most European cars, the same bulb does the job of the tail and brake lighting. However, it has double filaments, allowing one set still working while the other set is burnt. You have to find the fuse box or the power distribution center (PDC). You will get the fuse panel under the dashboard and the PDC under the hood.

Why does my brake light keep turning on?

It could happen due to a loose connection of the wire or the corrosion or damage of the wire ends. Connect the light switch to a good ground with a jumper wire and press the brake pedal. If the brake light turns on, you have to fix the ground connection.

How can I Fix my rear brake light?

If you take the tail light assembly off and take the bulb out, you’ll see three metal contacts on the tail light assembly. Pry them up slightly and slide a small, folded piece of aluminum foil underneath it. Replace the bulb and try to reproduce the problem. I found this fix online and did it to both sides of my car.. no problems since

Replace the turn signal switch. Bad contact inside causing a crossing of the circuits. When the turn signal is applied it should open the brake light circuit allowing for just the signal to work. Doesn’t sound like the switch is doing it’s job. 99 Chevy Tahoe… Rear turn signals, brake lights, and hazards

What would make your brake lights not work?

Lack of power to the brake lights can include: Burned out brake light bulb. Blown brake light fuse. Broken wire in the harness. Poor connection at the bulb socket. Body control module (BCM) shorted. Brake light switch not working. Turn signal or multi function switch failure.

Why are my brake lights not working?

When your brake lights don’t work, it is usually because of a blown fuse, a worn-out or broken brake light switch, or a burned-out light bulb. And on most vehicles, the brake light system is usually a simple circuit that includes a brake light switch, the light bulbs or lamps, a fuse,…

Why are the tail lights not working?

Tail lights do not work when the headlight switch is activated. As noted above, different automotive manufacturers have different tail lamp bulb configurations. In many cases when the lights don’t work when the headlight is turned on, it is caused by a burnt out or short circuited tail lamp bulb.

Why do your brake lights work but not your tail lights?

The possible reasons for brake lights not working but tail lights are: Blown out light bulbs are the most common reason for why the brake lights not working but the tail lights are. Remove the screws from the bulb lens (which you can access through the trunk or see your vehicle repair manual to get the exact location).

What to do when your third brake light is not working?

When the lower lights do not come on and only the third-brake light works, the brake-light switch may be ruled out. Again try the emergency-flashers to check for wiring, socket and lamp problems. If the flashers work, check for blown fuses as a few vehicles use separate circuits for the lower and third brake lights.

How can I tell if my brake lights are blown?

Usually, you can tell if the fuse is blown by looking at the fuse element through the clear plastic box. However, if you need to confirm that the fuse is still good, you can check it using a digital multimeter. Set your multimeter to Continuity, or to a low setting in the Ohms scale. Touch each fuse connector with a multimeter lead.

Which is the dimmer brake light left or right?

One of my brake lights is dimmer than the other. When I hit my brakes, my left brake light is much dimmer than the other. I pulled both of them out from their sockets and can easily see that the left rear light is not lighting up as bright.

Are there any brake lights that still work?

Recently replaced 2 burned out brake lights on the drivers side. Discovered brake lights still don’t work. Passenger side works fine. Exchanged bulbs but no luck. Brake lights still don’t work. All running lights work as well as backup lights and turn signals. Just can’t get the two drivers side lights to work. Any help would be appreciated.

Why are my tail lights not working but brake lights are working?

Burnt out light bulbs – The other reason your tail lights are not working but your headlights are maybe a blown bulb. When the filament inside the bulb breaks it cannot illuminate the gas enclosed within the glass cover. This burnt-out bulb does not affect the circuitry of the light system and it continues to function normally.

Is it dangerous to drive without brake lights?

Driving during the night without brake lights or tail lights can thus be extremely dangerous. The problem is that you cannot often tell if your taillights and brake lights are faulty. Therefore, it is necessary for both your taillights and brake lights to work.

Why is my brake and turn signal not working?

Before you do that, you will need to connect a scanner that can communicate with the BCM. Believe it or not, you could have a BCM code that is stopping your brake and turn signal lights from working. Most people don’t have access to a scanner that can access the BCM, so you will most likely need to book an appointment with us to do this.

What do you need to know about brake lights?

And on most vehicles, the brake light system is usually a simple circuit that includes a brake light switch, the light bulbs or lamps, a fuse, and the wiring that connects these devices. So troubleshooting the system is usually relatively simple and something that average car owners can do themselves.

The causes for dysfunctional rear lights are: 1 Burnt bulbs 2 Blown out fuse 3 Damaged wiring 4 Electrical issues

What causes brake lights to not work but tail lights do?

5 Causes of Brake Lights Don’t Work But Tail Lights Do 1 Bad Light Bulbs 2 Bad Brake Light Switch 3 Broken fuse or fuse box 4 Bad sockets and connectors 5 Broken wire More …

What to do if rear brake light is not working?

Check for power and ground at the turn and brake light sockets. I suspect in your case you will have a good ground but you won’t have any power. If you discover there is a bad ground, this will be the simplest repair.

Why is the left side of my brake light blinking?

Try the signals in both directions. If your bad side (left/right) is now blinking (the wand action will be reversed), the problem most likely a bad column switch. If you have a VOM, test the continuity between the B/W/G wire and both the B/W and B/G wires. The B/W wire corresponds to the left side, the B/G wire to the right.

Why does my brake light turn on when I push the pedal?

When the brake pedal gets pushed, a switch is triggered to send a signal to the lights out back that it’s time to turn on. Analog switches wear out over time, and they can get dirty, too, which interferes with their ability to make positive contact and transmit the right signal.

Why is my brake light not working on my Jeep Grand Cherokee?

Jeep Grand Cherokee brake light not working – fixed! – YouTube If playback doesn’t begin shortly, try restarting your device. Videos you watch may be added to the TV’s watch history and influence TV recommendations.

Jeep Grand Cherokee brake light not working – fixed! – YouTube If playback doesn’t begin shortly, try restarting your device. Videos you watch may be added to the TV’s watch history and influence TV recommendations.

You will get the fuse panel under the dashboard and the PDC under the hood. The brake light switch is also to be found under the dashboard and check if its plunger touches the brake pedal arm. Any problem with the fuse box and light switch will affect the brake lights.

What to do if your brake light is out on one side?

These must normally be replaced as an assembly and are not serviceable. A brake light out on one side only is most often a bulb or socket problem. Try the emergency-flashers and if the lamp still does not light, bulbs or sockets are the very likely cause. Inspect the bulb filament and replace any found bad.

You will get the fuse panel under the dashboard and the PDC under the hood. The brake light switch is also to be found under the dashboard and check if its plunger touches the brake pedal arm. Any problem with the fuse box and light switch will affect the brake lights. In case if the fuse is blown, change it with a new one.

How can I tell if my brake light bulbs are good?

Substitute a known good bulb, from the other side, to verify bulbs that cannot be confirmed otherwise. Inspect sockets closely for signs of discoloration, distortion or corrosion on the contacts. With the brakes depressed, lightly touch the terminals with a voltmeter, to check for voltage.

How do you replace a broken brake light?

Use your head lamp or flashlight to determine which bulb in the housing is the brake light. Turn the brake light holder counterclockwise to release it, then pull the bulb holder and bulb into the trunk. Remove the bulb from the holder.

Can a brake light switch not be installed?

In many cars, there is a special procedure to remove and install the brake light switch. If not installed correctly, the switch will not operate and can even be damaged. In some cars, the gap between the brake pedal and the switch must also be adjusted.

Is it safe to drive with a faulty brake light switch?

A car with a faulty brake light switch is UNSAFE to drive. In most cars, the brake light switch is installed right above the brake pedal. Inside, it has a one- or two-way electric switch. The most common symptom of a faulty brake light switch is when brake lights don’t come on or stay on all the time.

When the lower lights do not come on and only the third-brake light works, the brake-light switch may be ruled out. Again try the emergency-flashers to check for wiring, socket and lamp problems. If the flashers work, check for blown fuses as a few vehicles use separate circuits for the lower and third brake lights.

5 Causes of Brake Lights Don’t Work But Tail Lights Do 1 Bad Light Bulbs 2 Bad Brake Light Switch 3 Broken fuse or fuse box 4 Bad sockets and connectors 5 Broken wire More

Driving during the night without brake lights or tail lights can thus be extremely dangerous. The problem is that you cannot often tell if your taillights and brake lights are faulty. Therefore, it is necessary for both your taillights and brake lights to work.

With a bad turn-signal switch, the third-light should still function. On this type system, the turn signals and brakes use the same circuit. When we use the turn signal switch, it cancels the brake light signal, on the side selected.

Why is my left rear brake light not working?

Brake Light not working – SOLVED! My left rear brake light was out (tail light still worked) so I replaced the bulb. Brake light is still out, so the problem was not the bulb, as the tail light still works with the new bulb installed. Any ideas short of replacing the whole tail light assembly? Could the fuse be the problem?

Can a defective brake light switch cause an accident?

Learn how easy it is to change the brake light switch on your Mercedes Benz. Brake light switch issues with Mercedes-Benz cars are the #1 problem that most owners face. Defective brake light switch can cause the lights not to turn on, therefore causing accidents and possibly get you in a middle of a lawsuit you could have avoided.

Why is my light bulb not coming out?

The light bulbs burnt out. The circuit breaker or GFI got tripped. The socket tab got flattened, and it’s not making contact with the light bulb. Some other common reasons might include: The light switch has stopped working. The Light fixture has stopped working. The wires are not connected properly. The ballast needs replaced.

How long does the bulb failure warning light stay on?

The warning light can be ON for 30min, then automatically OFF for a couple of hours, then ON again. I checked all exterior lights when the warning light was ON: head lights (low and high beam), parking lights, turning lights, braking lights and rear night lights were all OK. Has anybody met the same problem as I have?

Why did my LED light bulb stop working?

Current LED lighting technique is very durable but sometimes even an LED lamp breaks down. This can happen after a short time or after several years. I am often asked by readers for advice why their LED light bulbs or the whole luminaire have failed.

Why are the brake lights not working on my Commodore?

Could be both, the brake is on a different fuse if memory serves. So first of all check your fuses, the ones your are looking for are under the dash, the top 2, 10amp fuses on the left. Now the bulbs as Wraith said are dual filament, and usually about $3 from most servos. To get to the bulbs, pop the boot, and unsrew the 2 screws on the tailight.

The left side turn signal and brake light is generally the yellow wire going into your trailer connector. The first thing to do is check the fuses on your tow vehicle. Next, inspect and test the connector at the rear of your tow vehicle with a circuit tester, like # 40376.

What to do when your brake light flickers?

While a helper holds down on the brake pedal move the bulb around slightly in the socket. If the bulb flickers replace or repair the socket. Also wiggle the wiring to check for opening wiring circuits.

First of all, you will get pulled over and be fined by a police officer since it is definitely illegal to drive without a working brake light. Second of all, other drivers cannot see you very well in the dark. Without brake lights, it is impossible for them to know whether you are stopping or not, so accidents on the road are very likely.

What happens when you change the brake light on a Toyota Highlander?

When you replace the brake light bulb on your Highlander, be careful not to touch the bulb directly with your fingers – the oil from your skin will cause the area that you touched to burn hotter than the rest of the bulb, which causes the bulb to burn out quicker.

What to do if your brake light is burnt out?

If a brake light is burnt out, replace it with a new bulb of the same type. If you are not comfortable doing this on your own, you can have a certified technician from YourMechanic perform a brake bulb replacement for you. Step 3: Check the brake lights again to verify they are working properly.

Which is brighter a brake light or a parking light?

~The bulb has two filaments… One is brighter [more wattage] than the other. The brighter one is for brake lights, and the dimmer one is for parking lights. That’s why I asked about the brightness of the parking lights in post 2.

What causes a brake warning light to illuminate?

A brake warning indicator can illuminate for multiple reasons including: 1 A burnt out brake light 2 Anti-lock brake (ABS) sensor malfunction 3 Brake pads low on material 4 Low battery voltage 5 Low brake fluid in the reservoir 6 Parking brake stuck on

What to do if your brake light bulb is stuck?

Grasp the bulb socket and twist firmly counterclockwise. This will allow the socket to come loose from the lens. Sometimes they can be a little stuck in which case you can use a pair of pliers to help break it loose.

What do you need to know about brake light switches?

When checking the brake light switch (or any type of car electrical circuit for that matter), it’s a good idea to have on hand the repair manual for the particular vehicle model. The manual comes with the location of the brake switch, the brake light circuit diagram, and lets you identify wires and connections.