this will make the brakes stay on and also the lites. Ensure the pigtail harness is disconnected and tucked away somewhere safe before removing the brake light switch, as you will be reusing that same harness later. Fortunately, with some basic mechanical and automotive electrical knowledge, you should be able to diagnose the problem with a multimeter fairly easily. This is a video tutorial on the top 3 most common things to check when an ABS light comes on. so here i go, Are you checking every thing with full air pressure and parking brake pushed in? l. My Parking Brake Light comes on intermittently while driving down the road. During this time a self-test of the ABS is automatically conducted. So I replaced that switch and still, the lights stay on. But that how it was with a R-model, again, no practice with a CS. Your link has been automatically embedded. Or , does the switch look like the one I replaced by the air tank? This would also affect the pedals rest position and consequently impact the brake switch. Thanks. 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. Anyway, my brake lights are constantly on. Having the proper tools will make brake light wiring jobs less difficult. BigMackTrucks.com is a support forum for antique, classic and modern Mack Trucks! A shadow of Vulva was somewhere about that either. The forums are not affiliated with Mack Trucks, Inc. Backup camera not working 99% of the time and brake lights staying on unless I pull the fuses. The forums are not affiliated with Mack Trucks, Inc. This cuts off the current and means the lights turn off. 20,006 satisfied customers. Note: it could also get stuck in the open position. You can post now and register later. Thanks Guys. any help would be greatly appreciated thank in advance. Also, check the light bulbs in the rear to see if the right type is installed, like mentioned earlier in the article. Another question for you. The fuel gauge being powered up shouldnt go through either ecm or vecu. Your car brakes are meant to keep you from getting into an accident. It's coming from the motor or somewhere up front. 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. Daniel Wilson, Expert. Retrieved a trouble code of 6-4 from Electronic Malfunction lamp. If not, flush out the old brake fluid before adding a new one to the reservoir. By 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've replaced the 3 air over electric switches also a new foot valve and the brake lights still hang on for a bit. Posted January 24, 2016. Converter dollies also have the lamp located on their left side. How Much Does It Cost to Fix a Tail Light? Upload or insert images from URL. Press and release the brake pedal and test if the brake lights are turning off and on. Specific Topic Forums for Antique & Modern Trucks. The best way to test if it is a switch or a foot pedal or trailer valve is to drain all the air from the truck every last drop. Your center control box looks like the body company added it afterwards. Blew it dry with air compressor nozzle, and dielectric grease.no more lights when key is off and my camera works again!! If there is an issue with the braking systems wiring, the lights might act unusually. January 19, 2016 in Electrical, Electronics and Lighting. Maybe it was a low air pressure sensor. The pedal must come back to its original position for the switch to close and the lights to cease working. The forums are not affiliated with Mack Trucks, Inc. How about the switch to the trolly brake valve? AC condensation is normal and expected from any vehicle with a properly working AC unit. Your previous content has been restored. In CDL School Now In all these cases, the open switch could drain current from your car battery, even when the engine is off. 5 Reasons Why Your Brake Pedal Goes to the Floor. When there is a fault in the electrical system, it can affect numerous components, including the brake lights. Sometimes, the brake pedal or switch is not aligned correctly, resulting in the brake light getting stuck. Lights went out. In most cases, fixing your always-on brake lights shouldnt be too expensive or take too long. A brake pedal that is stuck or not closing the switch is another cause for the brake light to stay on or get stuck. If the vehicle you drive was built after March 1, 2001, and it is equipped to tow a trailer, it will actually have two ABS lamps on the dash one for the tractor (or truck) and one for the vehicles being towed. Hope that helps if any one else has this issue.. Amsoil vs Mobil 1: Difference & Which Is Better? Probably if you just don't say "Mack" talking about Midliner those guys might not find anything extraordinal in a request. A test light, multi-meter, or volt ohm meter, like a. Unplug the brake light or stoplight switch. I have taken my turn signal switch apart and cleaned it and nothing had changed. So, hear is the latest with it. Sometimes can drive the car for 30-40 minutes and no lights come on. Brake lights that wont turn off when you remove the key from the ignition will drain your car battery pretty quickly. Only one of the two wires attached to the brake light switch should render this result. Always install the right light bulbs! I have a 2012 F550 with a 6.7L diesel truck. Mack 97 ms3, daytime running lights won't shut off. You'll find it. If this brake component is defective, you want to replace it, which should cause your brake lights to work normally again. Thats because itll be expensive well into the hundreds and possibly breaching the $1,000 mark. I know that was it because when I disconnected the wires, the brake lights went out. Cruise control cuts off unexpectedly. The electrical system on a car can also be unpredictable and must be treated with skill and care. My rear camera just went out and now my tail lights are coming on and off. When the switch inside the brake system isnt working right, your lights cant turn off. Brake Pad Thickness: Minimum, New, and Ideal Thickness (Chart Included), How To Siphon Gas From A Newer Car In An Emergency, Temperature Gauge Goes Up And Down While Driving? Among the most common reasons your brake lights stay on are circuit errors, brake assembly problems, or a low brake fluid level. Any ideas on what could be causing this problem? Every month 400 people find a job with the help of TruckersReport. Please add some more information. Conversely, determine if your turn signals need replacement this applies to American vehicle owners with blinkers incorporated into the brake light circuit. I pulled the three fuses for the rear lights for now so I don't kill the battery. OffRoadingPro.com is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to Amazon.com. 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. Recently purchased a 2015 platinum edition 6.7L (2 months ago) I've had some work done to it, lift kit, new wheels tires, replaced all the lights with recons except the headlights. Where else could I look to troubleshoot this. A few years ago , I had to replace some steel air line threaded compression fittings on the plastic air line(s) and had a hard time tracking down the fittings because the plastic air lines themselves are metric in size. Paul. I would do what 41chevy says and follow the parking brake airlines, starting at the parking brake switch. Brake Pedal Goes to Floor? 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. Learn more on our about page. 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. The two air valves (parking brake and trailer air supply) come as one unit , I've removed this unit many years ago from its mounting place .. and I believe the only things connected to the knobs are the air lines. 2010 Mack Cxu613. Is A Manual Transmission Faster Than An Automatic? I traded out the stop light relay with 3 others and it is still staying on. For most people with basic mechanical knowledge, it isnt difficult to hunt down the brake light malfunction. If your brake lights are stuck on, it means that the drivers behind you wont be able to see when youre braking, which could lead to some serious accidents. Depending on your state, you could be subject to a hefty fine if you are pulled over for driving with your brake lights on at all times. ABS and Traction Control Light On? Turn signals or hazards do not function. The brake light switch should close as soon as you press the pedal. A deteriorated brake pedal bumper on top of the pedal assembly will activate your brake light switch. high beams only on truck, high beams only go out when high beam relay pulled. The other day they started to act up. Make sure that the brake pedal does not stay abnormally locked in place either. This is done by replacing the brake pedal switch. after releasing brake or trolley lights stay on and relay is not resetting. When an ABS malfunction is detected during this test, the lamp stays on; otherwise, the lamp turns off after a few seconds. All the way on the left side of the dash by volt and oil pressure gauges. When you release the pedal, a spring pushes it back to its resting position, and the switch opens. Don't know where it could be located on Midliner and the most forum members seem like about that either. I can hear the truck making a humming noise just before they turn on. A loose wire will not make the brake lights work. Before going through some potential reasons for your brake lights staying on, its crucial to know how they work. The air pressure is good (brakes do not engage). Loosen and remove the bolts holding the switch in place (could be as many as 1-4 bolts depending on vehicle). I'm afraid (and would advise) you should try to check in some Renault trucks or other European forums to get info on Midliner. tractor stop lights work as they should, its strictly on wires to trailer pigtail/. While some issues are simple to assess and fix, others occur due to unkempt car parts. 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. Might have to go steal them back off my buddy's truck to test them. 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. Its likely to cost you between $120 to $150. When the switch inside the brake system isn't working right, your lights can't turn off. joey mack I will definitely check that out tomorrow. As an Amazon Associate, I earn from qualifying purchases. BigMackTrucks.com is a support forum for antique, classic and modern Mack Trucks! Precise air filtration is essential to the optimal operation of your vehicle. The forum is owned and maintained by Watt's Truck Center, Inc. an independent, full service Mack dealer. leversole 11.2012, 10-4 Vlad I'll check the things comin off the trolley valve. The plunger in the pedal can corrode and stop the pedal from returning. Upload or insert images from URL. If youre in traffic and your brake lights stay on, other drivers may not see you actually braking, which could cause a rear-end collision. By The symptoms are that when the parking brake valve in the cab is released , the park brake "on" warning light on the dashboard stays lit , but the rear tail lights are not effected by this problem. FYI- alot of this tubing is used in the engine compartment as well on my CS300. Tighten the adjustment nut and bolts with a ratchet and socket. Never the tail lights. Is it illegal to drive with brake lights stuck on? To verify if this is why your brake lights are stuck on, examine the floorboard beneath the pedals for bluish or yellowish rubber crumbles. I got a 2003 Mack Vision that has day time running lights. Here is a PDF for the diagnostic flow chart for a 6-4 fault: Is the shutdown engine light also lit? Probably only onewire in / one wire out. 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. BigMackTrucks.com is a support forum for antique, classic and modern Mack Trucks! The brake pedal switch is located near your brake pedal and you can often adjust it. If you have an account, sign in now to post with your account. There are many parts of the braking system that can get corroded or covered with debris. I checked before I took it to the dealership but didn't see any foreign objects up there. Dont take chances with the braking system. Actually you should look for a unit wich is attached to a air line and has a wire terminal (or two) on its body. To do this, you will need to: Another brake assembly part that is commonly found at fault is the brake pedal switch bumper. 4 Years 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. Replace the bulb if its the wrong type. 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. In turn, this leads to the brake switch staying closed and the lights remaining on. I would check your ignition switch. If you cant get the brake pedal to come back up from the floor, the lights are not going to go off. In my search fora new replacement pipe and braided hose has resulted in about $400 for the two parts and the pipe comes straight and I'll have to get it bent to match the one pictured below. Truck starts/runs/drives normal. There was no flickering or anything when I pulled on it or shook it. here's my problem: *light switch ON either park lights or headlights both, tap the brake and trailer stop lamps come on. I totally agree, I think tomorrow I will remove the wires going back to the pigtail from the firewall and test again. The best way to test if it is a switch or a foot pedal or trailer valve is to drain all the air from the truck every last drop. 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. Read More How Often Should You Change Your Air Filter In Your Car?Continue, The buzz around Amsoil vs Mobil 1 oils is no secret. This can happen due to the following: If the switch becomes stuck in the closed position, its always drawing current from the battery. 3 Years Thankfully, this is the least likely root cause of your brake lights staying on after the car is turned off. Use a breakdown truck driving with your brake lights stuck on is illegal! I did remove the red wire from the block on the firewall and tested the connection it goes to with the same results. If it's not a simple fix I will take it to the dealer when I have time. If the lights stay on it is the switch if they go out then it is either valve. Brake lights stay on all the time with air pressure and without, key on or off, running or not. Specific Topic Forums for Antique & Modern Trucks, ! Here's how. So if your brake lights are sticking on, make sure to get them fixed as soon as possible. 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 . Clean out any debris left behind by the old switch stopper in the hole where the bumper goes into. In this case, your brake lights wouldnt come on when you press the pedal. 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. IDK what's wrong with it and I think they're not too sure themselves. If no luck, then you may be dealing with a non-working spring, a faulty switch, or a short in the brake circuit wiring. Thank you! Hey Paul - See pictures attached - The parking brake air valve and the dash warning light that stays on. They don't come on anymore unless you turn on the head lights and then turn them off. Glad to hear you have your air line issue resolved. This is the most obvious reason your brake lights wont go off. If the light stays on during the self-test or comes on as the vehicle is being driven, there is an ABS malfunction. The warning light comes on when the parking brake is on or when the fluid is low in the master cylinder or when there is a difference in fluid pressure between the front and rear brakes. 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 . going to need to trace power starting at the key when the key is in the off position. Youll pay next to nothing in terms of parts. Without taking the leads from their place, depress the brake pedal. If there is something wrong with the BCM, this could leave the brake lights stuck on. The switch could be stuck or failed..Hope this helps. 1.8k. Ben is an IMI-qualified light vehicle technician from England with experience in a fast-fit garage. Daniel Wilson. Thanks for the direction my friend. I just hope they can figure out what's wrong with it soon! You also need to remove the brake switch from the brake pedal linkage. Depending on your vehicles make and model, you may need to remove pieces of the interior trim to access the fuse box, and you may need to inspect more than one fuse for your brake light. Fully releasing the parking brake will get your brake light unstuck. The flanged part of the switch bumper should be pushed hard into the hole so that it snaps into place. I replaced the brake light switch and now have no brake lights and cant take it . 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 . Logically on or near the Parking Brake Knob. 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. You can use a pair of needle nose pliers to unhook the spring and replace it.