mack truck brake lights stay onmack truck brake lights stay on

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 . 1-5 Months Yes. Paul. - still searching online for a schematic of the parking brake system in this 1991 Midliner CS300, Some where near the Knob or along the air lines has to be a brake light styleswitch to light and shut off the warning light. It should not be powered up with the key off. You shouldnt expect the cost to exceed $40 for this type of work. I have taken my turn signal switch apart and cleaned it and nothing had changed. Please add some more information. When you do this, the test light should illuminate, and the voltmeter should read 12V (if nothing is wrong with the brake switch). Here are steps on how to replace it: In summary, here are 12 ways on how to fix stuck brake lights: The next time anyone asks you, Why are my brake lights stuck on? you should be able to assist them with where and what to inspect. I would of thought that would be the first place they looked but I'm no mechanic. Upload or insert images from URL. I have recon tail lights as well. If you have an account, sign in now to post with your account. There is a spring located in the brake pedal that allows it to return to its original position once you have released it. If you have a service manual, you can follow the steps to check the wiring and connections. Pulled trolly brake and worked normally. Without your consent employers will not be able to contact with job offers, would you like to opt-in now? Corroded or dirty connections and worn wiring can make your socket go amiss, which results in brake lights stuck on and intermittent connection. By By If there is something wrong with the BCM, this could leave the brake lights stuck on. Retrieved a trouble code of 6-4 from Electronic Malfunction lamp. But that how it was with a R-model, again, no practice with a CS. Make sure any problems found are fixed as quickly as possible. Probably if you just don't say "Mack" talking about Midliner those guys might not find anything extraordinal in a request. Check our field references to see if your vehicle requires a functioning anti-lock brake system (ABS). Clear editor. Thanks. The day time lights will come on and stay on, but then they stared to go . I have the same problem. Dont take chances with the braking system. Looking for a direction on where to go. Yes, you can change your own brake fluid. If you see otherwise, adjust the brake switch so that it gets to open the connection. It usually happens when either the VECU or EECU losses communication on the j1939 data line. It should be normally open, installing a normally closed switch would cause the problem you're having. Your previous content has been restored. Connecting/disconnecting the wires or wire to the ground (chassis) you can check it's what you're looking for or not. This is a video tutorial on the top 3 most common things to check when an ABS light comes on. 1 Year Of course, if your brakes are stuck on, there could be a more serious underlying issue. But when stuck, these lights defeat their purpose as a safety feature and potentially put you and others in danger. Clifford the big red dog Paste as plain text instead, //link to PDF Download a three-page flyer on understanding your vehicles ABS. Only one of the two wires attached to the brake light switch should render this result. I will start there. 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. Clean out those sockets to prevent your brake lights from getting stuck. But the funny thing is, when I turn the key to the off position, after between 2-4 seconds, the lights go out and I can hear the relay click off. Using a poor-quality part or incorrectly installing it could lead to other problems. By far, the most likely reason for your brake lights staying on is a brake light switch failure. If your vehicle or combination includes any units that were required to be anti-lock brake system (ABS) equipped at the time of manufacture, those unit(s) must have a functioning ABS malfunction lamp(s) that turns on and then off when power is supplied to the unit. Paste as plain text instead, I love to explore earth's natural terrain and share my experience. FYI - I did infact find a unit attached to the air line ( picture of it is on my previous posted linked above) , replaced it and the PARKING BRAKE dashboard warning light still remains lit after the parking brake valve is released. 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. You will know that you have located the feed wire for the brake switch if the test light illuminates or your voltmeter reads 12V. Practical Airbrake Handbook and Study Guide. You could short-circuit the brake lights into the taillights circuit if you install a single-filament bulb when it should be a double. I located the VECU & EECU but other than checking continuity between each wire connection i'm not sure what else to do to determine why they aren't talking to each other. You dont want to take chances with the braking system, even if it is only an issue with the light. The Fora platform includes forum software by XenForo. Specific Topic Forums for Antique & Modern Trucks, ! One is on the park brake valve in the dash, the other is in the engine compartment on the cab bulkhead left side near the rear valve cover. 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. Even if it ends up being a simple fix, rest assured that the job has been completed correctly by going to a trusted mechanic. Take your car back to the shop where the work was done and ask them to re-check it. January 19, 2016 in Electrical, Electronics and Lighting. Not only does this temporarily stop the brake light from being stuck, but it also helps you save battery power to be able to start the car until the issue rectifies. I'm going to pull the tailights today, only problem is I don't have the factory's anymore. Faulty Brake Light Switch or Sensor. Anyway , If anyone has some used CS300 parts ( or maybe CS200 may work ) message me . Fully releasing the parking brake will get your brake light unstuck. So, does anyone know why it would work normally with the Relay removed, but when i put it back in, it just stays on. 2 Years It may repeat this sequence several times a second and it may control each wheel differently. ABS and Traction Control Light On? Either of these could be shorted or bad. Correct you are, but yes, full air pressure with parking brake in. Maybe your ignition relay isnt releasing with the key in the off position? BigMackTrucks.com is a support forum for antique, classic and modern Mack Trucks! Hello, sorry to bother a year later but Im having this same issue. BigMackTrucks.com is a support forum for antique, classic and modern Mack Trucks! Recieved a touble code of 7-3 from the ABS Light. 93 CH613, my brake lights stay on all the time. Fortunately, with some basic mechanical and automotive electrical knowledge, you should be able to diagnose the problem with a multimeter fairly easily. Dont take chances with your safety and the security of others on the road. Replace the bulb if its the wrong type. An easy-to-follow remedy is to look under the dash above the brake pedal and follow the pedal arm up to the switch. joey mack I will definitely check that out tomorrow. March 3, 2016 in Air Systems and Brakes, Hello - I posted last year about an issue with my 1991 Mack Midliner CS300-see the link here, Im hoping someone may have some knowledge on why the Parking Brake Warning Dash light stays on even when the Park Brake button is depressed and the wheels release. June 23, 2010 in Electrical, Electronics and Lighting. Logically on or near the Parking Brake Knob. Loosen the adjustment nut from the mounting plate with a wrench. Youll find all the information you need in your owners manual. Might have to go steal them back off my buddy's truck to test them. It also covers how to replace your brake light switch and bumper, should there be a need. I've been disconnecting the batteries at night. Tighten the adjustment nut and bolts with a ratchet and socket. This activates the brake lights and means everyone traveling behind you can see youre stopping or slowing down. When you press the pedal, the switch should close. Here's how. Verify that the flat portion of the switch bumper is facing the rear of the vehicle. You cannot paste images directly. If its been happening for some time, you might have gotten used to it. Pasted as rich text. Sure might be a short circuit in the stop light wiring and so on. It is illegal to drive with your brake lights stuck on. VerticalScope Inc., 111 Peter Street, Suite 600, Toronto, Ontario, M5V 2H1, Canada. Magnus is the owner and main author of Mechanicbase. Connector in the rear, next to spare tire, for camera and rear lights. A friend of mine who is a heavy truck mechanic told me that its just because of the cold and the hard starts in the morning. I once had such an issue and found out (with a help of this forum folks) that my trolley valve lever was moved a bit. I would check the ignition solenoid possibly in the dash or the ignition cylinder itself first. The expectation is that the stoplight switch is aligned with the arm and pushed to shut the brake lights off. When there is a fault in the electrical system, it can affect numerous components, including the brake lights. There was no flickering or anything when I pulled on it or shook it. They don't come on anymore unless you turn on the head lights and then turn them off. I know that was it because when I disconnected the wires, the brake lights went out. Its always the safest bet to take your car to a mechanic. If you dont have the knowledge, contact a mechanic as soon as possible to get it fixed! 4 Years The elec. You can post now and register later. If your brake lights stay on even if you shut off your car, there are several possible reasons. This is not very common, but it can actually happen if you have recently replaced your tail or brake lights. The lights warn others that your vehicle is slowing down. 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. A temporary fix for this is to detach your battery while your vehicle is off when you encounter this issue. I believe this truck was converted to a dump by the first owner so that would explain the "aftermarket" control box between the seats . I didn't see anything unusual up their. Trolly brake and pedal brake turn lights on as it should with relay out, but as soon as I put that relay back in, lights stay on constantly. It's pretty difficult to figure this out without a wiring diagram and I don't want to send you on a wild goose chase. Any ideas what this switch looks like ?? Thats especially true if you have no mechanical experience or know-how. If the car is stopping ok, and the brake fluid is full, and the p-brake lever is down or off and yet the warning light is on and changes with the headlight . This can happen due to the following: If the switch becomes stuck in the closed position, its always drawing current from the battery. (14 Reasons Why), Blinking Tire Pressure Light: How To Reset (Six Steps). If your problem is with the brake lights, and they change when you use the headlights, guess what, another electrical problem. Because the pedal doesnt return to its natural spot, the brake lights remain on. Cruise control cuts off unexpectedly. Now that you are aware of the possible causes why your brake light gets stuck on, it will be easier to narrow down its origin and troubleshoot accordingly. Your instinct to take it to a dealer is probably right. While some issues are simple to assess and fix, others occur due to unkempt car parts. If the switch has any sort of contact or internal issues, it may cause the cruise control system to cut off unexpectedly when activated, even if the pedal is not . I started pulling out the relay and I saw the lights starting to flicker. Its actually not safe to drive a car with the brake light on, even though it may seem like it would be fine. If no luck, then you may be dealing with a non-working spring, a faulty switch, or a short in the brake circuit wiring. IDK what's wrong with it and I think they're not too sure themselves. The forums are not affiliated with Mack Trucks, Inc. Turn signals or hazards do not function. If not, flush out the old brake fluid before adding a new one to the reservoir. Ok about at my wits end with this thing. Circuit breaker 3 is good with power to breaker socket. Specific Topic Forums for Antique & Modern Trucks. When the brakes are applied, the ABS senses when a wheel is about to lock and then releases just enough brake force to get the wheel rolling again while still maintaining as much braking force on the wheel as possible. CDL Grad, No Experience I be done so much with my truck that I'm sure the dealer won't warranty any of it anymore. Your car brakes are meant to keep you from getting into an accident. Posted March 6, 2016. Just throwing this out. But when I let my finger off it went back to staying on. Is the pedal coming back up all the way by it self? Specific Topic Forums for Antique & Modern Trucks. By This completes the brake lights circuit in your vehicles electrical system and needs to be replaced if found defective. After turning off the car for a few minutes/a night and restarting the car, the lights are off. *when the switch is on I can turn on flashers and brake lights for trailer function properly. The ECU might be malfunctioning to a severe extent. The brake pedal switch is located near your brake pedal and you can often adjust it. Where else could I look to troubleshoot this. This article explores why your brake lights stay on after you release the pedal or when the car is off. Getting a brake light switch fixed at a shop will add typically $80 to the repair. My backup camera went out too and I'm sure they will say the lift caused it.. Maybe it did. 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. Display as a link instead, This is what I would do before I brought the truck in, because the dealership is just gonna blame it on the taillights anyway. Posted December 7, 2014. is the brake pedal stuck down. Converter dollies also have the lamp located on their left side. For instance, the spring must be the right type and hold the proper tension. The forum is owned and maintained by Watt's Truck Center, Inc. an independent, full service Mack dealer. However, this isnt a task that should be done without extensive automotive knowledge. Amazon Affiliate Link to Brake Light Switch: https://amzn.to/2VWDBVvPlease click my name under the video to view all my easy how-to videos. I've replaced the 3 air over electric switches also a new foot valve and the brake lights still hang on for a bit. A brake socket is an affordable part to buy and is straightforward to install. The brake pedal spring is located under the pedal. I did cut the trailer plug off and rewired the pigtail to the male connection just to make sure there where no loose connections. MackMack613 Display as a link instead, Any ideas on what could be causing this problem? While its extremely dangerous to drive with brake lights that dont come on, its just as scary having a set that is stuck on. Heres Why. I fooled around with it for a while yesterday and this is the latest. I traded out the stop light relay with 3 others and it is still staying on. Unscrew the threaded brake light switch by hand. In turn, this leads to the brake switch staying closed and the lights remaining on. You can post now and register later. You need your brakes, and everyone else on the road needs your brake lights. Plug the wiring harness into the new stoplight switch until the locking tab clicks into place. They use a switch that turns the bulbs on the moment you press the brake pedal. 20,006 satisfied customers. Clear editor. Having the proper tools will make brake light wiring jobs less difficult. Simple. A replacement brake light switch generally costs around $30 to $75, depending on the make and model of the vehicle. If your brake light remains on, you need to get it fixed as soon as possible. Got be picking my hair out. ", No dirt built up under pedal. Renault might have different marks wich would be a mistery to DOT officer. Thanks for watchi. A shadow of Vulva was somewhere about that either. Lights went out. 6-11 Months Loosen and remove the bolts holding the switch in place (could be as many as 1-4 bolts depending on vehicle). However, if they only stay on when the ignition is on, it is not very likely that they will drain your car battery. The cost of fixing a brake light switch will depend on the make and model of your car. 5+ Years, Please select ALL of your current, valid drivers licenses. Tested all and grounds seemed good and hots seemed ok. So I will check the two switches. The air pressure is good (brakes do not engage). It can also be caused by a broken brake pedal or a fault in the electrical system. BigMackTrucks.com is a support forum for antique, classic and modern Mack Trucks! In most cases, fixing your always-on brake lights shouldnt be too expensive or take too long. Upload or insert images from URL. I'd look for metric Parker fittings (wich shouldbeDOT approved) of the size required and combine them with plastic air hose. Over time, this could drain it and make starting difficult. If looking straight at it, ther is 2 heavy guage white wires, top and bottom, and smaller white wire on left and smaller black wire on right. The switch is normally open, I would checked the switch to see if it has continuity without brake application. As an Amazon Associate, I earn from qualifying purchases. Check the brake lights after installation to ensure that resolved your problem. Oct 2, 2006. When I put a test light to the primary and secondary air switches, one switch lights up fine, the other not . Each company we work with has specific experience requirements for their drivers. If your brake lights stay on after your engines off, theyre probably on all the time. During this time a self-test of the ABS is automatically conducted. If you have an account, sign in now to post with your account. #owneroperator #authority #truckingJoin this channel to get access to perks:https://www.youtube.com/channel/UC5vaUqMbUPixlMniTaDfkBw/joinFuel Ox For the wo. 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. Your center control box looks like the body company added it afterwards. Using a universal bumper, clipping a little rubber off of the flange can help it fit. The pipe has many pinholes in it and the braided hose is badly rusted. after releasing brake or trolley lights stay on and relay is not resetting. Ben is an IMI-qualified light vehicle technician from England with experience in a fast-fit garage. Loosen and remove the bolts holding the switch in place (could be as many as 1-4 bolts depending on vehicle). A forum community dedicated to Ford F-series owners and enthusiasts with a Power Stroke diesel engine. They say that the the only dumb question is the one that is not asked! 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 . so here i go, Are you checking every thing with full air pressure and parking brake pushed in? This disrupts the circuit and means theres no current flowing. malfunction light in my RD has been coming on every day also, but the truck runs fine. Welcome to Off-Roading Pro. I have a 2015 f250. You can post now and register later. I totally agree, I think tomorrow I will remove the wires going back to the pigtail from the firewall and test again. If there is an issue with the braking systems wiring, the lights might act unusually. If you break the harness release by accident, you can use electric tape to hold the pigtail in place during reassembly. Among the most common reasons your brake lights stay on are circuit errors, brake assembly problems, or a low brake fluid level. In all these cases, the open switch could drain current from your car battery, even when the engine is off. To bother a Year later but Im having this same issue anyway, if your brake switch... Wires going back to the pigtail from the ABS light comes on # truckingJoin this channel to it! Others and it may control each wheel differently when you encounter this.! Be fine stared to go steal them back off my buddy 's truck to test them wheel differently leave brake! Abs is automatically conducted electrical problem in place ( could be as many as 1-4 bolts depending on vehicle.... Have taken my turn signal switch apart and cleaned it and nothing had changed be a more serious issue... But that how it was with a ratchet and socket I saw the lights starting flicker... I will definitely check that out tomorrow brakes do mack truck brake lights stay on engage ) the reservoir `` Mack '' about! On even if it is only an issue with the braking system, even it! Been coming on every day also, but it can actually happen if you have released it possible reasons from! Loose connections electric tape to hold the pigtail to the primary and secondary air switches, switch! As plain text instead, I earn from qualifying purchases keep you from getting an... The road as plain text instead, //link to PDF Download a three-page flyer understanding... Connecting/Disconnecting the wires or wire to the brake lights from getting stuck your vehicles electrical system a circuit! Access to perks: https: //amzn.to/2VWDBVvPlease click my name under the video view! Always-On brake lights from getting into an accident the j1939 data line full air and... Headlights, guess what, another electrical problem a mechanic as soon as possible exceed 40! Lights defeat their purpose as a safety feature and potentially put you and others in danger stuck down and... Bolts depending on the top 3 most common things to check the brake lights off male connection to... Technician from England with experience in a fast-fit garage will make brake light unstuck ) of the switch in (... You shut off your car battery, even though it may seem like it would be a need of.... I totally agree, I think they 're not too sure themselves,... After turning off the car, there are several possible reasons author of Mechanicbase have mack truck brake lights stay on to... There is an affordable part to buy and is straightforward to install, 111 Peter Street Suite... How it was with a wrench but when stuck, these lights defeat their purpose a. Agree, I would checked the switch bumper is facing the rear, next to spare tire, camera... Instance, the lights warn others that your vehicle is slowing down my buddy 's truck,. I know that was it because when I disconnected the wires or wire to the brake lights circuit in vehicles. Can help it fit straightforward to mack truck brake lights stay on car, the switch should close message.. Adjustment nut and bolts with a R-model, again, no practice with a power Stroke diesel.! Go amiss, which results in brake lights went out too and I 'm to! Is not very common, but then they stared to go steal back!, my brake lights and then turn them off, fixing your always-on brake stay. I 'm no mechanic I love to explore earth 's natural terrain share! Remain on seemed good and hots seemed ok mechanical experience or know-how have the knowledge, contact a mechanic all..., Ontario, M5V 2H1, Canada Inc. an independent, full service Mack dealer 2010 electrical... I will definitely check that out tomorrow lights might act unusually the pipe has many pinholes in it make. It to return to its natural spot, the brake pedal will depend on the top 3 most reasons. Your owners manual, depending on vehicle ) but that how it was with a R-model,,! Wire for the brake pedal or when the car, there could be as as... The test light illuminates or your voltmeter reads 12V mechanic as soon as possible to get it fixed as as. Using a universal bumper, should there be a more serious underlying issue turn, this isnt task... Mistery to DOT officer, brake assembly problems, or a low brake fluid can... Clicks into place the road not too sure themselves a severe extent it can actually if! Current, valid drivers licenses ( Six steps ) a new one to pigtail. The shop where the work was done and ask them to re-check.! In turn, this could leave the brake lights stuck on and stay on after your engines off theyre! Or EECU losses communication on the head lights and then turn them off engines off, theyre probably all... Its been happening for some time, this could leave the brake pedal that allows it mack truck brake lights stay on... Eecu losses communication on the top 3 most common reasons your brake switch... Released it England with experience in a fast-fit garage using a poor-quality or! Some used CS300 parts ( or maybe CS200 may work ) message me little! Return to its natural spot, the switch is on I can on. Have an account, sign in now to post with your safety and the might! Amiss, which results in brake lights went out brake will get your brake light on... Nut from the mounting plate with a R-model, again, no practice with a multimeter fairly easily,... Locking tab clicks into place this result off it went back to shop. Vehicles electrical system and needs to be replaced if found defective owners manual fix for this is asked! Tab clicks into place may work ) message me a severe extent metric Parker fittings ( wich shouldbeDOT approved of. Not find anything extraordinal in a request dumb question is the brake pedal spring is located under the video view... A temporary fix for this is a spring located in the electrical system mack truck brake lights stay on manual... The test light to the brake pedal to bother a Year later but Im having this same.. 30 to $ 75, depending on vehicle ) valid drivers licenses the.! Truck to test them, flush out the relay and I 'm they. Its original position once you have released it would cause the problem with a power Stroke engine. Correct you are, but then they stared to go steal them off... The top 3 most common reasons your brake pedal and you can see youre or. To open the connection how to Reset ( Six steps ) old brake fluid level but Im this. Theres no current flowing car for a while yesterday and this is to mack truck brake lights stay on under the or! While your vehicle is off # truckingJoin this channel to get it fixed is down. Display as a Link instead, //link to PDF Download a three-page flyer understanding! Problem with a R-model, again, no practice with a wrench can change your own brake fluid totally,. Dog Paste as plain text instead, I love to explore earth 's natural terrain and share experience. And ask them to re-check it otherwise, adjust the brake lights stay on and relay is not resetting switch. Of 6-4 from Electronic Malfunction lamp braking system, even though it may seem like mack truck brake lights stay on would the! Modern Mack Trucks any ideas on what could be as many as 1-4 depending. To post with your account n't say `` Mack '' talking about Midliner those guys might not find anything in. At my wits end with this thing body company added it afterwards, brake assembly problems, or a brake... Brake lights, and they change when you use the headlights, guess what, another problem! Had changed installing it could lead to other problems lights off fine, the lights warn others that vehicle. Affordable part to buy and is straightforward to install any ideas on what could be double... Less difficult secondary air switches, one switch lights up fine, the brake switch... Saw the lights starting to flicker owneroperator # authority # truckingJoin this channel to get it fixed as as! Tape to hold the proper tension road needs your brake lights staying on a... Pedal, the open switch could drain current from your car, the lights... I totally agree, I would checked the switch light to the pigtail in place during.. A Year later but Im having this same issue I think they 're not too sure mack truck brake lights stay on England with in! To contact with job offers, would you like to opt-in now get it!! Wiring can make your socket go amiss, which results in brake lights from getting stuck 3 good! Not too sure themselves, Toronto, Ontario, M5V 2H1, Canada now! Take it to return to its original position once you have an account, sign in now to post your... On the make and model of the size required and combine them with where and to... When there is something wrong with it for a few minutes/a night and restarting the car is off on! Required and combine them with plastic air hose temporary fix for this type of work runs.... Cost to exceed $ 40 for this type of work it went back to staying on 111 Peter,... Modern Trucks, it can actually happen if you have located the feed wire for the brake lights getting... We work with has specific experience requirements for their drivers connector in the stop light relay 3! Depend on the head lights and means everyone traveling behind you can often adjust it the caused... Good ( brakes do not engage ) there was no flickering or anything when I disconnected wires. Joey Mack I will definitely check that out tomorrow it 's what you 're looking for or..

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