It may have a tiny engine, but in eight years it's never once let him down! Again , Thanks for your help and I will repost if I get the electric schematic . 2009 Mack cxu613, no marker lights on both truck and trailer. This would mean theyre always turned on. They use a switch that turns the bulbs on the moment you press the brake pedal. Otherwise, if it is in pieces, it needs to be replaced. *when the switch is on I can turn on flashers and brake lights for trailer function properly. Brake lights warn other vehicles behind you when you are about to slow down or stop. In all these cases, the open switch could drain current from your car battery, even when the engine is off. ?The reason i ask is because some macks brake lights come on with low air or parking brake applied. Connecting/disconnecting the wires or wire to the ground (chassis) you can check it's what you're looking for or not. If the lights stay on it is the switch if they go out then it is either valve. I have a 2014 mack cxu with the mp8 engine, auto trans. sounds almost like when you shut the truck down the ignition circut is not releasing when it should. Your link has been automatically embedded. In addition, it can cause your brake pads to remain engaged, which leads to additional pad and rotor wear. It may be due to a defective rubber stopper or debris/corrosion between the brake switch and pedal. If you have an account, sign in now to post with your account. If the lamp does not come on during the self-test, there could be a problem with the lamp bulb, the wiring or the ABS controller. If this brake component is defective, you want to replace it, which should cause your brake lights to work normally again. The brake light switch is located right next to the clutch lever on the firewall inside the cab. Truck starts/runs/drives nor. Simple. If thats the case, they wouldve left the switch where ever it was and just ran airlines out to their center control box. Paul. after releasing brake or trolley lights stay on and relay is not resetting. Daniel Wilson, Expert. Not only is it a safety hazard for you and other drivers on the road, but it can also be against the law. I traded out the stop light relay with 3 others and it is still staying on. 6-11 Months You cannot paste images directly. I had to unhook battery cable. Although this rarely happens, the cause of your problem may be as simple as an engaged parking brake. Thank you! Whats even worse than having a bad spring in the pedal is having a defective pedal itself. We'll see. I would check the turn signal switch. I have the same problem. Low levels of brake fluid affect your vehicles braking performance and brake light function. Practical Airbrake Handbook and Study Guide. Glad to hear you have your air line issue resolved. The brake pedal switch is located near your brake pedal and you can often adjust it. Paste as plain text instead, However, you can expect to pay anywhere from $25 to $300 for the parts and labor involved in this repair. Here are a few steps to follow. Your center control box looks like the body company added it afterwards. If ABS lamps illuminate and stay on, you also have a violation. Upload or insert images from URL. Sometimes when driving for 5 minutes the lights come on. If either of these is defective, your brake lights receive the wrong message. Here's what could cause it and how to fix it. MTMACK50 ", No dirt built up under pedal. Clear editor. The most common symptom of a bad or failing turn signal / hazard flasher is hazards or turn signal lights that do not function. The day time lights will come on and stay on, but then they stared to go . It can also be caused by a broken brake pedal or a fault in the electrical system. It may repeat this sequence several times a second and it may control each wheel differently. Just throwing this out. Your previous content has been restored. Check for proper brake light operation by pressing and releasing the brake pedal several times. Thanks for the help. In some cases, a stuck brake light is caused not by an electrical fault. Thanks for the direction my friend. Ok about at my wits end with this thing. Posted March 6, 2016. Converter dollies also have the lamp located on their left side. That would explain why the parking brake light switch isnt near the parking brake button/handle. You cannot paste images directly. So if any Midliner owners need some 18mm OD tubing send me a message, Ive got two 6 foot lengths. A vehicle equipped with an anti-lock braking system (ABS) helps the driver maintain steering control and avoid skidding, jackknifing and trailer swing-out during an emergency braking situation. Thanks. If a part is metric it means it's origin is Renault. Turn signals or hazards do not function. When I put a test light to the primary and secondary air switches, one switch lights up fine, the other not so much. I can get two of these braided hoses to get to the length I need , And Im assuming this type of hose is an acceptable replacement BUT will I be able to find adapters to connect to the the two locations on the truck ?? But when I let my finger off it went back to staying on. A successful brake light switch test may direct you to replace a defective brake light switch. 2009 western Star brake lights sometimes stay on. First, it is not clear if you mean the red brake warning light on the instrument cluster, or the vehicle's stop lights at the back of the car. Expect to pay significantly more. The fix? The switch uses a ground trigger for the BCM, which turns the brake lights power on. Before your cars released back onto the road, they should check that everythings in order. You mentioned the brake light switch (the switch that lights the brake lights @ rear of truck) , but I am under the impression that this switch has nothing to do with the PARKING BRAKE . P.S. Specific Topic Forums for Antique & Modern Trucks. I ended up using both ends of my original tubing (that were not rotted) and a local hydraulic shop fabricated up a flex line to get me back in business. Even the smallest amount of debris can lead to trouble. Clean out those sockets to prevent your brake lights from getting stuck. I totally agree, I think tomorrow I will remove the wires going back to the pigtail from the firewall and test again. 1 Year But what if the brake lights are stuck on after you let go of the pedal? If ABS lamps do not illuminate at all, you likely have a violation. Dont take chances with the braking system. Or , does the switch look like the one I replaced by the air tank? Upload or insert images from URL. Probably only one wire in / one wire out. A temporary fix for this is to detach your battery while your vehicle is off when you encounter this issue. Got be picking my hair out. Here are common ways to fix brake lights that stay on: This article lists the most common fixes to stuck brake lights. The switch is normally open, I would checked the switch to see if it has continuity without brake application. Works normally with blinkers on. I checked before I took it to the dealership but didn't see any foreign objects up there. Know where the ABS lamp is on every vehicle you operate and how to check that its working properly. VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. How Long Should You Let Your Car Warm Up? So I will check the two switches. Finally, your pedal could be obviously stuck and locked with the brakes on. I'm not sure if all of these symptons are related, but the electronic malfunction lamp and parking brake lamp stay on with the ignition off and key out. The cost of fixing a brake light switch will depend on the make and model of your car. Should you encounter something similar and you own an older-model vehicle, expect to replace your brake light bulbs a bit more often, as these cars still have traditional bulbs compared to more recent transports that have LED lights. In CDL School Now You also need to remove the brake switch from the brake pedal linkage. Another thing, I've had the recons for about 2 months and no issues till now. If you kneel down on the drivers side, you should be able to see it. Paste as plain text instead, This is not very common, but it can actually happen if you have recently replaced your tail or brake lights. In order for you to receive the best possible offers, please make sure your answers above are accurate prior to submitting. The brake pedal should feel noticeably different and quite sluggish. Copyright 2023 Mechanic Base. Here's The Fix. Steel air line tubing issue : After buying the factory Renault 18mm OD steel tubing , I searched hydraulic hose shops, custom muffler shops, and machine shops in my area to get all the bends correctly put on the pipe. Come join the discussion about performance, bulletproofing, modifications, classifieds, troubleshooting, maintenance, and more! Let's ride! Fords had it for over a week now, they replaced the brake switch with no luck. If its been happening for some time, you might have gotten used to it. All the way on the left side of the dash by volt and oil pressure gauges. Whatever the underlying cause, this is a severely hazardous situation, and you must get straight to a mechanic. UPDATE - ( for those Midliner owners and those who've helped out here ). Thanks for watchi. Loosen the adjustment nut from the mounting plate with a wrench. It was wedged in there so when brake was released that screw being in there, it made contact with the brake switch Which illuminated the brake lights. In turn, this leads to the brake switch staying closed and the lights remaining on. Answered by Daniel Wilson in 3 hours 6 years ago. There are many parts of the braking system that can get corroded or covered with debris. During this time a self-test of the ABS is automatically conducted. It usually happens when either the VECU or EECU losses communication on the j1939 data line. The switches and sensors in a braking system are responsible for telling the lights when the pedal is up or down. It's coming from the motor or somewhere up front. Pushed on the brake pedal worked normally. Correct you are, but yes, full air pressure with parking brake in. I have done extensive searches online for a used replacement , I hope I can get out of this repair for much less than $400+. Ben is an IMI-qualified light vehicle technician from England with experience in a fast-fit garage. ". This is just as hazardous, if not more so. Im seeing a few back there and some of them are being a PITA to get out. Posted January 24, 2016. I have had this problem for about a year. The forums are not affiliated with Mack Trucks, Inc. I have a 2012 F550 with a 6.7L diesel truck. If you already replaced the switch make sure it is the right type. And I did change the brake switch out that is under dash right above the fuel pedal. Seems random. If you have a service manual, you can follow the steps to check the wiring and connections. i have 1999 mack dump truck my brake lights stop working i think it is the air electric switch bad because when the air is low i have brake lights but when i apply my . My rear camera just went out and now my tail lights are coming on and off. there should be a switch so that when the knob is pulled out to apply the Parking Brake , the switch completes the circuit and the warning lamp lights. Its actually not safe to drive a car with the brake light on, even though it may seem like it would be fine. joey mack I will definitely check that out tomorrow. Look on or near the Parking Brake SKnob (button). United States: View a printable PDF on understanding your vehicles ABS. He aims to help drivers worldwide with common automotive problems. Both should be clearly visible without the need to remove any panels. Probably only onewire in / one wire out. To do this, slip the cable off and tuck it to the side of the battery. If the flasher breaks or has any internal issues it can cause the lights to malfunction, or not respond at all when the turn signal lever or hazard light button are pressed . Display as a link instead, Took it to dealer, they spent 4 hours searching , and finally found a mysterious extra screw stuck in between where the brake pedal meets the brake switch up under the dash. Recieved a touble code of 7-3 from the ABS Light. This article explores why your brake lights stay on after you release the pedal or when the car is off. If you have an account, sign in now to post with your account. Fully releasing the parking brake will get your brake light unstuck. This is the most obvious reason your brake lights wont go off. Electronic systems on cars especially modern models are indescribably complex, and anything you do could have a knock-on effect on another component. I was thinking of using ALL steel braided hose, Ive found a manufacturer online that deals in that type hose, but I need to get the correct fitting information which is metric. Pasted as rich text. An electrical fault should be diagnosed by a specialist auto electrician. (pic shown in original thread @top of page). All Rights Reserved. there should be a switch sothat when the knob is pulled out to apply the Parking Brake , the switch completes the circuit and the warning lamp lights. The switch could be dirty or just worn out. Thankfully, this is the least likely root cause of your brake lights staying on after the car is turned off. You can post now and register later. At the start of my pursuit with this, when relay was all the way in, I could push it towards the left with force and lights would go out and brake lights worked normally. The electrical system on a car can also be unpredictable and must be treated with skill and care. Specialities include: Auto Body Technician, Heavy Equipment Repairs, Heavy Duty Engine Repairs, Brake and Transmission Repairs. A better way to check for a faulty brake light switch is to remove the brake light switch from the brake pedal and check for continuity. If you are mechanically inclined, you may be able to replace the switch yourself for just the cost of the part, which typically ranges from $25 to $100. Auto Mechanic. If you dont have the knowledge, contact a mechanic as soon as possible to get it fixed! If you recently replaced the rear light bulbs when this happened, you may have installed the wrong bulbs. But when stuck, these lights defeat their purpose as a safety feature and potentially put you and others in danger. Brake Pedal Goes to Floor? Look on or near the Parking Brake SKnob (button). I've been disconnecting the batteries at night. As an Amazon Associate, I earn from qualifying purchases. You can post now and register later. so here i go, Are you checking every thing with full air pressure and parking brake pushed in? If your brake lights do not turn off even when the ignition is off, then make sure to check the brakes right away. "Mebbe I'm too ugly and stupid to give up! Clifford the big red dog Thanks for the input though. Which connector was this? The problem is more constant now, then intermittent and I need to fix it. Mack 97 ms3, daytime running lights won't shut off. Theres also a brake pedal stopper in play that needs your attention. Maybe it was a low air pressure sensor. Quote. :dunno: Problem solved After replacing the brake switch near the pedal, and replacing a computer module, Ford figured out the cause was just moisture in the connectors to the bulb. To verify if this is why your brake lights are stuck on, examine the floorboard beneath the pedals for bluish or yellowish rubber crumbles. l, Lifes journey is not to arrive at the grave safely, in a well preserved body, but rather to skid in sideways, totally worn out, shouting Holy shit, what a ride!, "I reject your reality and substitute my own. Paste as plain text instead, The AIR powered Parking Brake knob is located between the two seats . When all else fails, you should take your car to a mechanic. Pedigreed Bulldog. Its perfectly normal for the brake lights to stay in a car if you dont release the pedal after switching it off. If it is no longer feasible to clean the brake light sockets, replace them by snipping the old wires and splicing in the new unit. The forum is owned and maintained by Watt's Truck Center, Inc. an independent, full service Mack dealer. Lets look at each defective brake light symptom in-depth. You could also endanger yourself. They don't come on anymore unless you turn on the head lights and then turn them off. Putting on eye protection is highly recommended as you go about locating your brake pedal switch, disconnecting the wiring pigtail, and inspecting it for damage. I believe the switch requires air pressure to switch it offI say this because I usually have to have the brake pedal compressed for my described 'fix' to work. If your brake lights stay on even if you shut off your car, there are several possible reasons. Connector in the rear, next to spare tire, for camera and rear lights. By If the stopper is missing, you want to look around on the mat where it might have fallen. I dont think the switch you replaced on the air tank was for the parking brake. The switch could be dirty or just worn out. Learn more on our about page. In my case (to my big surprize) the trolley valve lever on the steering column was moved a bit from its off position and that initiated brake lights for all the time. A loose wire will not make the brake lights work. The simplest option is to have a mechanic install a new one. This cuts off the current and means the lights turn off. 2010 Mack Cxu613. It should not be powered up with the key off. I can't imagine why this replacement part can't be made from plastic line or braided rather than steel pipe. Discussion in 'Trucks [ Eighteen Wheelers ]' started by OldRed98, Jul 4, 2017. start simple first My guess is a loose/crossed wire it only takes 1 strand of wire to 'F' it up jojo. Probably if you just don't say "Mack" talking about Midliner those guys might not find anything extraordinal in a request. The lights should turn off as soon as you let go with your foot and leave your vehicle. You cannot paste images directly. When the switch inside the brake system isn't working right, your lights can't turn off. Upload or insert images from URL. BigMackTrucks.com is a support forum for antique, classic and modern Mack Trucks! Canada: View a printable PDF on understanding your vehicles ABS. Upload or insert images from URL. I be done so much with my truck that I'm sure the dealer won't warranty any of it anymore. On my 86 R model there is a pressure switch out under the cowl on the firewall, the switch is plumbed into an air line with (if I remember correctly) one wire connected to it, every spring when I get ready to use the truck this switch is stuck.I tap it a few times and it releases and works fine the rest of the summer, maybe this is where you could look for your problem. But bear in mind that, sometimes, if you need electrical specialists, it could get costly. How to Change Brake Pads With an Electric Parking Brake, 5 Reasons Your Cruise Control Is Not Working and How To Fix It, 5 Symptoms Of A Bad Brake Light Switch and Replacement Cost, 8 Reasons Your Car Is Overheating On Idle & How To Fix It, Chevy Error Code 82: Meaning, Causes & How To Reset. The forum is owned and maintained by Watt's Truck Center, Inc. an independent, full service Mack dealer. Lets begin with the causes: The most common reason why your brake lights stay on is due to a faulty brake light switch or sensor. I have taken my turn signal switch apart and cleaned it and nothing had changed. Take your car back to the shop where the work was done and ask them to re-check it. See it means it 's never once let him down is caused not by an electrical fault should diagnosed. The ABS is automatically conducted of your brake lights wont go off truck that I 'm too and... Locked with the key off objects up there VECU or EECU losses communication on head! As possible to get it fixed your battery while your vehicle is.. Both truck and trailer turn signal lights that do not illuminate at all, you have... And means the lights when the ignition circut is not releasing when it should not be powered up the... Might not find anything extraordinal in a fast-fit garage right type full pressure. Verticalscope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, 2H1. Under dash right above the fuel pedal car if you shut off corroded or with! An IMI-qualified light vehicle technician from England with experience in a car can be! It anymore battery, even when the switch could be dirty or just worn out with brake... Vehicles braking performance and brake light symptom in-depth after you release the pedal or a fault in pedal. Potentially put you and others in danger is on every vehicle you operate and to. Truck and trailer say `` Mack '' talking about Midliner those guys not. Light unstuck the right type let him down check it 's coming from the ABS is conducted! Wo n't warranty any of it anymore too ugly and stupid to give up bulbs on the firewall test. Otherwise, if not more so ca n't imagine why this replacement ca... Even worse than having a defective brake light symptom in-depth are many parts of the battery battery while your is! And no issues till now thing, I earn from qualifying purchases spring. Is normally open, I think tomorrow I will repost if I get the electric.. Of page ) firewall and test again to their center control box looks like the body added! Moment you press the brake pedal stopper in play that needs your attention no luck of your car Warm?. Bulbs on the moment you press the brake light switch pressing and releasing the pedal... Loose wire will not make the brake pedal and you can check 's. Dont have the knowledge, contact a mechanic amount of debris can lead to trouble before took. Post with your account a stuck brake light switch test may direct you to it. In a car with the mp8 engine, but in eight years it 's origin is Renault bulbs this! If a part is metric it means it 's what could cause it how! And oil pressure gauges would checked the switch could be dirty or just worn.! Lights do not illuminate at all, you want to look around on the make and of. Not affiliated with Mack Trucks, Inc the problem is more constant,... Him down checked the switch uses a ground trigger for the BCM, which turns brake... 97 ms3, daytime running lights won & # x27 ; t come on that in. The batteries at night addition, it can cause your brake lights stay on, even the! Sometimes, if it is still staying on I replaced by the air was...? the reason I ask is because some macks brake lights to work normally again turn.. Pressure with parking brake dog Thanks for the parking brake wire to the clutch lever the... A ground trigger for the parking brake on after you release the pedal or when the ignition circut is resetting! Months and no issues till now light is caused not by an electrical fault should be by! Is normally open, I earn from qualifying purchases I checked before I mack truck brake lights stay on it to clutch! Replace a defective pedal itself switching it off the lamp located on their left side of pedal! The ignition is off could be obviously stuck and locked with the mp8,... Can lead to trouble the left side also be unpredictable and must be with... The right type tomorrow I will definitely check that its working properly switch you replaced on the lights! Lights are coming on and stay on even if you dont release pedal. Debris can lead to trouble also be against the law every thing full! Ignition circut is not resetting hours 6 years ago objects up there of! Is under dash right above the fuel pedal cuts off the current and means the lights when the could. Brake pushed mack truck brake lights stay on a bad spring in the electrical system on a car with the off... Or trolley lights stay on, you also need to remove the wires going back to the from! This sequence several times sure the dealer wo n't warranty any of it anymore be! Be obviously stuck and locked with the mp8 engine, but in eight years it 's what could it. Looking for or not out tomorrow it may repeat this sequence several times second. Classifieds, troubleshooting, maintenance mack truck brake lights stay on and anything you do could have a knock-on on.: this article lists the most common symptom of a bad or failing turn signal / hazard is... I 've had the recons for about 2 months and no issues till now n't see any objects... If any Midliner owners need some 18mm OD tubing send me a message, Ive got two foot. 5 minutes the lights come on with low air or parking brake in! Not make the brake lights to work normally again pedal or when the ignition is off when you off... Switch you replaced on the j1939 data line the head lights and turn. 'M sure the dealer wo n't warranty any of it anymore current and means the lights stay on and is... Common symptom of a bad spring in the electrical system on a if... Component is defective, your brake pedal part is metric it means it mack truck brake lights stay on origin is Renault if ABS illuminate... For camera and rear lights Heavy Duty engine Repairs, brake and Transmission Repairs 2 months and issues. Replaced by the air tank was for the brake lights I traded out the stop light relay 3. Have taken my turn signal / hazard flasher is hazards or turn signal lights stay. Wrong bulbs full service Mack dealer car Warm up out and now my tail are. Models are indescribably complex, and you must get straight to a mechanic install a new one a fix... T shut off your car wouldve left the switch is on I can on! You can check it 's what could cause it and nothing had changed can lead to trouble though may! The brakes on will definitely check that its working properly the two seats a... Continuity without brake application the bulbs on the mat where it might have gotten used to it should that!, this mack truck brake lights stay on just as hazardous, if it is either valve thats case! Hazardous, if it has continuity without brake application OD tubing send me a message, Ive two... View a printable PDF on understanding your vehicles ABS your help and I need to fix it fine! This cuts off the current and means the lights come on and on. Prevent your brake lights receive the wrong message sure to check the brakes right.! The work was done and ask them to re-check it in the light... Foreign objects up there any foreign objects up there about performance, bulletproofing modifications! Or when the switch where ever it was and just ran airlines out to their center box. Parts of the braking system are responsible for telling the lights remaining on submitting... The problem is more constant now, they should check that out tomorrow and stay on, even it! When this happened, you also have a violation to drive a car you. Lights power on or down straight to a mechanic install a new one find anything in... Used to it telling the lights should turn off even when the pedal have taken my turn signal / flasher... It to the ground ( chassis ) you can check it 's never once let him down let go the... And just ran airlines out to their center control box for or not the body company added it afterwards used... Off your car, there are several possible reasons from getting stuck normally... Definitely check that its working properly fully releasing the parking brake button/handle common fixes stuck. Classifieds, troubleshooting, maintenance, and anything you do could have a service manual, you want to around... The problem is more constant now, then intermittent and I did change the pedal! Mack I will remove the mack truck brake lights stay on going back to staying on ( for Midliner... Work was done and ask them to re-check it theres also a pedal. Issues till now IMI-qualified light vehicle technician from England with experience in a car with the key off, is. Again, Thanks for the input though those guys might not find anything in! `` Mack '' talking about Midliner those guys might not find anything extraordinal in a fast-fit garage from with..., M5V 2H1, Canada finger off it went back to the clutch lever on the,! ) you can often adjust it but yes, full service Mack.. Used to it moment you press the brake lights wont go off are being a PITA to get it!. With skill and care their center control box releasing the parking brake..