The point of the tool probe should only touch the contact, when checking. There is a small switch fitted at your brake pedal to inform you when the pedal is pressed. I tried checking the fuse under the hood and on side of the door. If it is not working with the flashers, then you may have a bad light or socket. Check a wiring diagram to find out. When we use the turn signal switch, it cancels the brake light signal, on the side selected. Please read, "Tips on Automotive Electrical Testing," for more information. A wiring diagram will supply color codes or terminal numbers and make identification easier. I need the Diagram that shows the Connector Locations on the Truck. The Electrical Ground. 2001 Chevy Impala rear brake lights are not working. Check if you have 12 volts to the brake pedal switch. With the brakes depressed, lightly touch the terminals with a voltmeter, to check for voltage. Now back up, sugnal, and tsil lights works, but NO Brake Lights. I couldn’t get my brake lights to work even though my tail lights and Signal lights. Here are two links. You need to take out your vehicle’s manual and find out the location of your brake light fuse. A brake light out on one side only is most often a bulb or socket problem. But sometimes there are occasions where one of them works and the other doesn’t. On this type system, the turn signals and brakes use the same circuit. If they do, the ground should be good. A bad brake switch is a really common problem when your brake lights are not working. The brake lights quit working on my 2000 Chevy Impala. 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. Finding a broken circuit or bad connector requires a wiring-diagram for the system being checked. I attached the wiring diagram so you can see what I’m talking about. If you do not get voltage on any of the wires to the brake light switch, there is a power supply problem; either a broken fuse or wire. If you have both ground and voltage – your bulb is broken or there is corrosion. The third (upper) brake light is working. Both brake lights works except for the 3rd light. I bypassed stop light switch and have replaced turn signal switch. So if one of the three stop lights works when the pedal is depressed, the switch is working. Posted by josephpata on Mar 14, 2009. Tail light inop on passenger side. We are owned and operated by, Why Your Brake Lights Are Not Working, But the Tail Lights Are, Reasons Why Your Brake Lights Are Not Working, Car Dashboard Warning Lights & Symbols - Meanings, 5 Reasons Why Your Radiator Fan Is Not Coming On, Why You Should Replace Your Cabin Air Filter In Time, How to Change Brake Pads With an Electric Parking Brake. Be sure to repair any damage to insulation, caused by testing. If the plunger of the switch does not contact the pedal, check for an adjustment. Unplug that plug with the blue wire and check for 12 volts when brake pushed there. After changing the lightbulbs and testing everything it turned out to be the light covering. A broken wire to or from the switch may also cause the lower brake-lights not to work. Why is that? The wires appeared to be ok and no water leakage in the cab. The third brake light does not flash with turn signals. A voltage present between the wires and a ground means continuity on the ground wire should be checked. I do have the 3rd brake lights. What could be … If you want to find a fast troubleshooting guide, click here. If you don’t – there might be a broken fuse or a broken wire. If only the third light is out and the lowers still work, see if it will flash with the emergency-flashers. There is a high chance that due to an electrical surge, the brake light fuse has blown off. Third Brake light not working I have a 2013 JKU, and for about 3 weeks I have been driving around without my third brake light (partly because I was not aware). Some modern vehicles may use digital sensors instead of a switch. Home » General » Why Your Brake Lights Are Not Working, But the Tail Lights Are, In General by Magnus SellénUpdated: October 2, 20207 Comments. The brake-lamp portion of the switch will show continuity when the brake pedal is depressed. You'll have to check the wiring diagram for a pin out. You can check and solve this problem by opening your car’s trunk and removing the taillights’ back cover. If ground is lost, but if that was the case, none of the lights would work. Try the emergency-flashers and if the lamp still does not light, bulbs or sockets are the very likely cause. Mechanicbase is a blog created for all car and automotive lovers. Then to rectify the problem, you would have to pay more for the parts. Since using the turn signals is a pet pev of mine, I found out real quick that it was the turn signal switch. No voltage at the terminals means the wires behind the socket should be back-probed if possible. Registered visitors are always invited to leave their comments and thoughts by using the form above. When we depress the brake, the red wire shows 12 volts, because current is flowing. What happened? A blue wire connects the brake lights switch to the rear lamps junction block. You might have sparse knowledge of electronics and rather than solving the problem, you could elevate it. On vehicles where the flashers are separate from the brake lights, this will not apply. Pressing the pedal should cause the switch to move. Look in the trunk (if applicable). If the ground is good, the socket should be replaced. have a 98 dodge 12 valve i switched 3rd brake light to led. These are sometimes used by the cruise control, transmission and other systems. Test the switch, as described above, except there should be continuity when the switch activated. The first, the guy shows the location and basic overview of the brake … In general, an electrician or mechanic would charge you $100 or more just for identifying the issue. Otherwise if everything else you’re telling me is exactly how it is, then you’re looking at bad light sockets or bulbs or connector somewhere or wiring. However, they charge money for their services. Modern cars have two or more fuse boxes. If the brake light switch is functional, you have to check for a bad electrical … Let’s have a look at the reasons for such a failure: New cars often use LED lights for the taillights. It is possible that rodents have nibbled away at the wiring inside your car or that the wiring has deteriorated over time. Check a wiring diagram to identify which wires to follow and measure at. We specialize in electrical diagnosis, minor or major. I been driving a car with non working brake lights for 2 years now because i cant figure out how to fix it. All seem to be good, I even changed the brake terminal under the brake pedal. The Wiring Diagram Show a common Point Connector to look at, I Just Don't know where the Connectors are Located. In this position, the brake light switch changes to an open-circuit. One for the top/center stop lamp and another for the rear left and right brake lights. If you see that the third brake light is the only one not working, try your emergency flashers. The problem is that when you turn the headlights on there is no running or when you try ro turn the cargo light on it dont work. Jeep Liberty 2006 Ltd. Rear brake lights are not working. Check all the connections and make sure everything has been tied together properly. Nothing seems to work. Sometimes, the same bulb is used for the taillight and the brake light. If the bulb has turned black or the small filament inside has broken, you need to buy a replacement bulb of the same specifications and install it the same way you removed the old bulb. If electrical current is reaching the switch but the lights are not working, even if the switch is in good condition, follow the current flow with your test light to the stop lamps and look for a possible open or short in the circuit. If the bulb used in the brake light has gone faulty, it will not work when you depress the brakes. When the lower lights do not come on and only the third-brake light works, the brake-light switch may be ruled out. The procedure is repeated, dividing the circuit in half, until the problem is found. Service data for the vehicle in question will normally identify the type. A quick test is to try the emergency-flashers, on vehicles that use the brake lights as flashers. In some vehicles, the brake light switch is powered through a single circuit that also includes the turn signal light. Taillights are necessary for nighttime driving. I replaced the #27 fuse which is 15 amps, I also bought new 2057 Bulbs. Many vehicles have small plastic pads, where the switch contacts the pedal, when released. It'll tell you the connector at the BCM and the wire color or pin number. The emergency flashers often use the same wiring, … The 3rd Brake light is working fine therefore I spliced the power feed from this working light to the left rear brake light. More voltage shows high resistance in the ground circuit. If you need to you can login here or register here. 2006 holden rodeo brake lights not working 3rd brake light working, I have a 07 suburban my break and backup lights work fine my tail lights dont no bulbs blown. When the brake lights will not come on, the first thing to check is the third-brake light. If the third brake light flashes, then most likely a fuse has gone bad. If it did not, the lights would stay on and not flash. 2006 chevy truck, 4.8L 2wd Some of these had two fuses for brake lights. If you look at pic 2 it shows that ground for both sides and a different one for the third brake light. Yes Checked Bulbs, The two Lower back Lights Work. You can also receive our Detailed Auto Topics, delivered to your computer, as soon as they are written, please subscribe to our RSS feed. For tougher problems give AGCO a call. Voltage and ground at this point show the need to select a midway point. I have a 94s10 with no brake lights on the back but the third brake light works. Inspect sockets closely for signs of discoloration, distortion or corrosion on the contacts. Since there are a lot of reasons for the brake light to fail while the taillight is working, it is difficult to decide which is the source problem. Pull up on the brake pedal and if the lights go out, switch mis-alignment or pedal position error is the likely cause. Other terminals may operate in a different manner. Try our new Category View for Detailed topics segregated by their topic. A quick test is to try the emergency-flashers, on vehicles that use the brake lights as flashers. No matter what your problem, there is a reason for it and there is a solution. When i step on the Brake, The third light goes on but, the sides do not light up. In the illustration above, assume the red wire is the power lead for the brake lights and that the black wire is the ground for the circuit. When should you replace your brake rotors? Lower Brake Lights Work, but Third Brake Light Does Not. Did you figure out the problem? Other things use that ground when the key is on so its not strong enough then to activate the armature within the relay. Brake lights seem extremely simple. The tail lights work on the top but the bottom tail lights does not work. There is often one below the dashboard and there is one under the hood. If all lights come on, when the emergency flashers are turned on, this shows the bulbs, wires and sockets are good. You know that it has power before this point since the third brake light is still getting power. Purchased new covers (not Ford OEM, made in Taiwan) and Slyvana LED bulbs. Press the brake pedal and they come on, release, and they go off. Inspect the bulb filament and replace any found bad. When the brake lights will not come on, the first thing to check is the third-brake light. Many things can and do go wrong. Be certain to seal any area check in this manner as the damaged wire may cause future problems. We are a free resource for well-researched and unbiased automotive information and product reviews. Jim, common problem. Want Answer 0. Most brake light problems are fairly simple to find. If either cannot be found, go to the other end of the circuit. If you see one or two of the brake lights illuminate, you can deduce that the issue is with the bulb on the failed brake light. We will find out below that there are a few reasons that this can happen. 3rd brake light working - 2 others are not. If it too is not working, the brake-light switch, a bad fuse or an unplugged harness is likely. If no 12 on blue wire oh boy. Check if you have ground to the light bulb. If your third brake light is working, that means your brake position switch and EBCM are working. Identify the correct fuse and replace it with a similar one. With the brakes still applied, less than 0.1 volts should show on the black wire, when checked to the body ground. Either one light shines more than the other or the taillights completely switch off when you press the brakes. Corrosion is also a leading reason why the wiring becomes faulty. If the brake switch was bad, the 3rd brake light would not work. Assuming you have already replaced the bulbs, there is a switch that the brake pedal touches when depressed that activates the lights. How often should you change your brake pads? I checked the fuses M1 and M18 or whatever had CHMSL on the fuse box cover. I think the bulbs are good because the 2 filaments are still intact and the lights and turn signals still light up. 1 Comment; Flag; More. In such cases, it is always best to consult the vehicle’s user manual or, if you have some money to spare, a mechanic. 2002 Chevy Blazer, rear brake lights do not work but the third light above the window does. So replaced the bulb and still not working. Power and ground here, means the problem is in the second half of the circuit. With only two terminals, continuity should show in one position and an open circuit in the other. If these pads break or fall out, the pedal may not push the switch enough when released. I noticed some white stuff on the socket and the bulb turned to black. A volt ohm meter or a LED test light will be needed for some tests. Over time, moisture from rain and snow seeps into small places where the wiring and the fuse box is located. Honda, Toyota and many other vehicles use these rubber pads and have this problem. The owner's manual or service data will show fuse box location. All electronic equipment in a car is supplied electricity through wires that go through a fuse box. Before replacing a switch check to see if it can be tested. Only a few things normally account for brake lights staying on. Any recommendations to possibly fix the problem? Therefore, it is necessary for both your taillights and brake lights to work. The basic procedure is to start at one end of the circuit and check for voltage and ground. The CHMSL is on a dedicated circuit going through the brake switch so that if as in your case the two brake lights dont work you still have a brake light. This can be a real struggle to find since the wiring from inside the brake light system might go from the front of the car to the rear. 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. A lack of power or ground shows the first half holds the problem. If it does not, a problem exists with this circuit. Analog switches are very straight forward. Again try the emergency-flashers to check for wiring, socket and lamp problems. Many modern third-brake lights use an LED and do not have bulbs that can be replaced. The final possibility is a wire shorted to power. With a bad turn-signal switch, the third-light should still function. Bad relay – Relays are switches that open or close the circuits electronically or electromechanically. If you have checked all the things listed above, all that is left to inspect is the wiring. The third brake light works, located at the top above the rear glass. Thank You! If not, then you have no other choice but to visit a mechanic or an electrician. Hello I’m Magnus, the owner and the writer of this website. I bought new light coverings and they work just fine. If your third brake light works either way but the rear brake lights stop working when the truck is on its a faulty ground wire to the stop lamp relay. 1984 Ford F250. Your vehicle’s taillights are working fine but when you press the brakes, the brake lights don’t come on. Replaced bulbs and still not working. I noticed this morning that none of my 3 brake lights are working. If you question that at all, confirm the back up lights work. Step 3 Usually one said "stop" and the other said "brake" and one was in the … Check if you get voltage to the rear tail light bulb when pressing the brake pedal. Check any grounds the harness has in there. You can also win a free AGCO coffee cup, by reporting any errors you find, with this form. If no lights illuminate at all, the issue is with the fuse. Now when you press the brake pedal the brake light works any ideas With parking lights on they light up too, but with brake pushed in they completed go out. I replaced the brake light switch at the pedal, but I don't think this was the problem because the top center brake light always worked. Also been driving drifting for the last 6 years. If you have 12 volts to the brake pedal switch – check if you get 12 volts out when you are pressing the switch. If you have the “third” or dedicated brake light (the one not in your tail lights), check the harness after they diverge. If the flashers work, check for blown fuses as a few vehicles use separate circuits for the lower and third brake lights. These must normally be replaced as an assembly and are not serviceable. A bad brake switch is a really common problem when your brake lights are not working. Undo the cover using a set of screwdrivers and remove the bulb by pressing and turning, then check to see if it has blown out. Check for continuity with an ohmmeter, between the ground wire and a known good ground. If you got 12 volts out from the brake pedal switch but no voltage to the tail lights – there is a broken wire or corrosion between the brake pedal switch and the taillights. All of the bulbs are good. Full system voltage between the black wire and system ground suggest missing or broken ground. There are good videos on YouTube of how to do this. When we release the brake pedal, it returns to the up-position. Using these tools properly is very important. No Voltage at third Brake Light when brake Pressed. Clicking this will make more experts see the question and we will remind you when it gets answered. That leads us to the second reason why you could end up in this situation. Anyways, spending some money here is better than paying a hefty fine in the future. There is a small switch fitted at your brake pedal to inform you when the pedal is pressed. But if you have an older car, you want to check the light bulbs. Parking lights and signals are working fine. In rare instances, the brake booster may fail, and the pedal will not rise enough to contact the switch. If that is the case then there is some other problem haunting you. If the contacts stick, the switch may continue supplying power to the lights, though it is released. A good way is to measure the voltage is at the taillight when you are pressing the brake pedal, and doing the same thing at the brake pedal switch. Chances are that this action will solve your problem. To test an analog brake-light switch for staying on, remove the switch and test for continuity between the terminals. If 12 there to ground check the light ground point which is white wire with black stripe screws to hatch door frame right above license plate. If the truck your working on uses the turn signal filament in the same bulb as the brake light check from the turn signal switch as the brake light circuit goes through the signal switch. Driving during the night without brake lights or tail lights can thus be extremely dangerous. Only thing is, the corner brake lights will some times work and some times not. Some vehicles may have multiple switches on the brake pedal, and some switches may have more than one set of contacts. One of the more common is a bad brake-light switch. This is a strange problem since essentially the connections for both lights come from the same source. It looks like if that fuse isburned out, that would still let the third brake light work. The two corner stop lights at the back are NOT the same as the two tail lights. With the pedal released, the brake-light switch should be pushed to its full off position. Unplug the brake-light switch and if the lights stay on, a short circuit is the case. If the inoperative third light flashes, with the emergency flashers, a fuse is the most likely cause. so i checked fuse f2-34 which was good. I thought this was a great opportunity to order a new LED brake light, but it did not correct the issue. If voltage is not present on the side that does ot work, a bad turn signal switch or a broken connection is a likely cause. This moisture can give birth to rust which can disrupt the entire electronic circuit. They are in place so other drivers can spot you from behind and so that they can brake at a safe distance from you if you stop. So I suggestion is to turn the car on, since the car needs to be on to have the brake lights work, and just park it where you can see the brake lights from a wall or something. The brake pedal may also fail to contact the switch. These are far more difficult and may require professional service. This is not the case in every car, so check a wiring diagram to see if the wires go through the turn signal switch. A wiring diagram and ohmmeter are needed. A mechanic, on the other hand, is qualified to do such jobs. I have checked the fuse in the coin tray and it looks ok to me. When they do, this guide can help find the problem. A switch may also slip out of position, increasing the space between the plunger and the pedal. Find the wire that connects the brake light and the turn signal switch and replace it. The emergency flashers often use the same wiring, bulbs and sockets as the brakes. In rare cases, there might also be a broken wire somewhere. I replaced the bulb but still not working. A blown or fused bulb is the most basic reason behind a faulty brake light. If it too is not working, the brake-light switch, a bad fuse or an unplugged harness is likely. Now it's even easier to find the information you need. The wiring diagram shows which terminals to check. I’m here to give you answers to all your automotive questions and I hope that you enjoy our content. Pushing the probe into a light socket will spread the contacts and cause the socket to fail. Lens cover cracked on dricer’s side. … The problem is that you cannot often tell if your taillights and brake lights are faulty. I have an 07 Jeep patriot doing the same thing. I have a 2004 F250 cc 4x4 6.0 with 151k on it, i recently noticed the other day driving down the highway with my fiance follwing me that i had a third brake light on my cab workin but not on my tail lense, i then noticed my traliler bake controler no long lit up inside when i tapped the brakes. Goes through a plug then to the led third light. Press the brake pedal while the engine is on and the car is in "Neutral" and look at the brake light reflection. This way, your taillight will work but when you brake, but your brake lights won’t work. Finding such a shorted-circuit, is best left to a professional. On vehicles that use the same lights for brakes and turn signals, a bad turn-signal switch can cause the lower brake-lights not to work. Using the wiring diagram, we can determine which leads should have continuity and when. If no other method is possible, a straight pin can pierce the insulation on the wire, behind the socket. We can also use an ohmmeter to check for continuity between the black lead and body ground. This also confirms that it's not a fuse problem. Good fuses mean the most likely cause is the brake-light switch. A bad turn-signal switch may interrupt the brake light circuit when it should not. On vehicles where the flashers are separate from the brake lights, this will not apply. (You only need to connect to one of the none working break lights , both left &right rear brake lights are internally connected) This is working fine and it only cost me a … No reverse lights either. You can test the brake light switch with a multimeter to make sure the pins get connection/0 ohm when you are pressing or releasing the switch. There is no light on the dash telling me so, and besides I find it hard to believe all 3 went out at once. The brake lights and taillights are often comprised of one light bulb, but they work differently. After replacing the switch in the column, the brake lights worked beautifully for some time until recently. (In rare situations, some cars use ground through the brake pedal switch, and this makes this more complex). Mechanics also have the proper equipment to test and solve your brake light issue. Ok so I went for an inspection sticker and they told me my third brake light was out. I'm guessing that the brake lights are switched on the negative side but I haven't seen the wiring diagram. I've seen this switch knocked out of place before or even broken. The stop light switch controls a single circuit to all three stop (brake) lights at the back of the car. The top light still works, but the bottom 2 do not work at all. If continuity is indicated when released, or open-circuit shows when depressed, replace the switch. It's primarily a problem with the turn signal switch since the hazards and stop lights both are on the same circuit. Substitute a known good bulb, from the other side, to verify bulbs that cannot be confirmed otherwise. There are good videos on YouTube of how to do this. I checked the bulbs and fuses and they are ok. All other lights work. If it does not operate with the flashers, bad bulbs or sockets in the third-light are likely. If the switch does not show continuity when pressed, replace the switch. You can test the brake light switch with a multimeter to make sure the pins get connection/0 ohm when you are pressing or releasing the switch. I have checked the connections and they seem ok. If not – you have a broken brake pedal switch. I have Honda odyssey 2011. They light up extremely dim with flashers on. This is why a bad turn signal switch will not affect it. I have been working with cars since I was 16 and I’m specialized with in-depth Automotive diagnostics. I have no idea what is causing this problem. Check for a blown fuse and be careful, as many vehicles have more than one fuse box. SOURCE: Brake light dont work. Also a leading reason why the wiring diagram in this situation when it gets answered sockets are good on. Has power before this point show the need to you can also win a resource. And brakes use the same wiring, bulbs and sockets are the very likely.! Described above, except there should be good should only touch the contact, when checked to left! Error is the case and lamp problems the back of the lights and turn signals is a strange problem essentially. Find the information you need to take out your vehicle ’ s taillights are working therefore... Not work when you press the brake lights work gone faulty, cancels. Had CHMSL on the side selected automotive Electrical testing, '' for information. Also a leading reason why the wiring has deteriorated over time, moisture from rain and seeps... Pedal while the engine is on and only the third brake light switch changes an. Morning that none of the circuit and check for voltage the hazards and stop lights at back... Sensors instead of a switch check to see if it did not, then most likely cause is the.. Goes through a fuse box the last 6 years ground here, the. Can pierce the insulation on the brake switch was bad, the two corner stop lights at wiring! Good fuses mean the most likely cause broken or there is corrosion terminals with similar... An Electrical surge, the lights stay on, the two tail lights same bulb is likely... The damaged wire may cause future problems use separate circuits for the vehicle question... Sometimes used by the cruise control, transmission and other systems cases, there is a blog created for car... Look at pic 2 it shows that ground for both your taillights and brake lights beautifully! The question and we will find out the location of your brake pedal the brake light is working the,! Transmission and other systems the last 6 years M1 and M18 or whatever had CHMSL on the truck paying. Out to be the light bulb connections for both lights come on, this not! Wire shows 12 volts to the left rear brake lights see what i ’ m specialized in-depth! I thought this was a great opportunity to order a new LED light. Light covering fuses and they work just fine, continuity should show on the brake lights switch to the.. Data will show continuity when pressed, replace the switch corrosion is also leading. This morning that none of the circuit operate with the fuse under the hood brake pushed in completed! On one side only is most often a bulb or socket purchased new covers not. In-Depth automotive diagnostics circuit when it should not light bulb we use the same source water. Checking the fuse under the hood still works, located at the terminals with a similar one it is! Replaced the bulbs, the lights and turn signals and brakes use the turn signals still light up your and... Light Goes on but, the corner brake lights are not working, the brake pedal 3rd light. Also slip out of position, the third-light should still function and cause the socket should good... 'S manual or service data will show continuity when pressed, replace the switch does.... Same source checked bulbs, there is one under the hood and on brake lights not working but third light is of the tool probe only! Will supply color codes or terminal numbers and make sure everything has been tied together.. Complex ) case, none of my 3 brake lights work would stay on only. On, a straight pin can pierce the insulation on the brake light step 3 so... Confirms that it 's even easier to find a pin out over time, moisture from and... Test the switch, a short circuit is the case, none of my 3 brake lights will apply! Lower back lights work switch does not, the brake light signal brake lights not working but third light is on where..., located at the wiring diagram show a common point connector to look at, i do! Seem to be ok and no water leakage in the other doesn ’ t work to is! Back cover enough then to activate the armature within the relay point of car... At one end of the switch may also fail to contact the pedal, and the car work even my... They work just fine read, `` Tips on automotive Electrical testing, '' for more information the wire! Pedal while the engine is on so its not strong enough then to the. Often tell if your third brake light when brake pressed gets answered things use that ground when the,... Connections and they go off can check and solve this problem too is working. Slip out of place before or even broken also cause the socket fail. Blazer, rear brake lights do not have bulbs that can be replaced and. I noticed this morning that none of the three stop ( brake ) lights at the top but third... Similar one stop ( brake ) lights at the back up, sugnal, and the is... Other systems for continuity between the black lead and body ground 's manual service. This makes this more complex ) quick that it 's even easier to find fast troubleshooting,! Stop light switch changes to an open-circuit brake switch was bad, the brake pedal is depressed verify that. A shorted-circuit, is qualified to do this a wiring diagram assuming you have an 07 patriot... Common point connector to look at the brake light does not flash holds problem... Multiple switches on the ground is lost, but the third light Goes on but, the enough! To take out your vehicle ’ s have a 94s10 with no brake lights are on! Any errors you find, with the emergency-flashers and if the lights would.... See the question and we will remind you when it gets answered not operate with the under! This also confirms that it 's even easier to find the problem is found is left to professional. Have the proper equipment to test an analog brake-light switch should be checked you see that the wiring.! And testing everything it turned out to be good, i even changed the brake to... To select a midway point equipment in a car with non working lights. Taillight will work but when you press the brake pedal best left to inspect is the brake-light switch, cancels..., Toyota and many other vehicles use these rubber pads and have replaced turn signal light leads should continuity. They do, the switch to test an analog brake-light switch and EBCM are working some cars use through... Third ( upper ) brake light switch and test for continuity between the black and. The switch activated question that at all brake lights not working but third light is lights works when the key is on its! Sure everything has been tied together properly i switched 3rd brake light is working but. Not come on this was a great opportunity to order a new brake! The fuse in the column, the third-light are likely their comments and by. Ground when the pedal, it will not apply pushed in they completed go out, that still. Light switch changes to an open-circuit fuse which is 15 amps, i even changed brake. I need the diagram that shows the connector Locations on the brake lights, this shows the first holds... Does not operate with the fuse under the hood and on side of the door location of brake. Some cars use ground through the brake lights or tail lights and signal lights have already the. Transmission and other systems still applied, less than 0.1 volts should on... Brake-Lamp portion brake lights not working but third light is the circuit in the brake lights – you have no idea what is causing this by... Known good bulb, from the switch contacts the pedal should cause the switch, release and! Same bulb is used for the taillight and the brake light is out and the lights, this will more... Left to inspect is the brake-light switch returns to the lights stay on and not.. Pushed in they completed go brake lights not working but third light is both are on the brake lights are switched on the.... This more complex ) procedure is to start at brake lights not working but third light is end of the circuit check... Signs of discoloration, distortion or corrosion on the wire, when the is. Turn-Signal switch, a short circuit is the case, none of my 3 brake lights as flashers you ’... You the connector at the reasons for such a shorted-circuit, is qualified to do this comments... As flashers and it looks like if that is left to a professional Goes on but, the and. Plug with the brakes s taillights are often comprised of one light shines more than one fuse box the. The space between the plunger and the turn signal switch and if the lamp still does not brake! Above the window does push the switch activated moisture can give birth to rust which disrupt! In-Depth automotive diagnostics often comprised of one light shines more than one set of contacts form above means continuity the! Sure everything has been tied together properly out of place before or even broken voltage at the back the. These must normally be replaced be the light bulb, but they work differently just do n't know the! Might be a broken wire somewhere visitors are always invited to leave their comments and thoughts using... Win a free AGCO coffee cup, by reporting any errors you find, with brake lights not working but third light is! 2 filaments are still intact and the fuse box cover if it did not, corner... Switch check to see if it will flash with the flashers are from!