If the test light is not on, you have to change this wire. The ECM runs numerous checks on the condition of switches it requires to initiate a parked Regen. The transmission will not shift gears and driver is limited to about 6 MPH. Im thinking a fuse, but it’s so difficult to locate that fuse. In this instance, the driver did everything correctly but the truck wasnt responding. I have a 2005 Mack Granite CV712. It’s a peculiar problem since you the tail lights work fine when you drive but hitting the brake produces no response from the rear lights. He owns a car repair shop at downtown Osaka, and he put all that experience to good use in his sharing posts. The driver places the truck on a surface away from potential fire hazards, sets the park brake, insures the cruise and engine brake switches are in the off position then holds the “Regen” button like hes supposed to… problem is, the light on the button just flashes and nothing happens. The brake light switch is activated by a combination of the primary and secondary air systems using a double check valve. It could happen due to a loose connection of the wire or the corrosion or damage of the wire ends. Detailed pre- and post-trip inspections are the best way to keep your Mack® truck on the road for the long haul. step number one; hook up the computer and check to see what condition the ECM is reading, this rules out a burnt out dash bulb. are the dash lights still working,if so,first check the bulbs,you can get a test light at autozone for a couple bucks,with the bulb out,test light grounded,have someone step on the brake pedal,touch the test lite probe to one of the contacts inside bulb socket,if it dont work your brake lite switch is out,its located under the dash,maybe on brake pedal lever I have to 12v outlets in the sleeper that do not work and I am trying to get them working again. How to Troubleshoot Big Truck ABS Lights by Alibaster Smith . In case if the fuse is blown, change it with a new one. Turn signal tail lights and BRAKE LIGHTS NOT WORKING. The Causes Why Tail Lights Not Working. Cant do a parked regen? The rear and headlights have separate connections. The possible reasons for brake lights not working but tail lights are: The Light Bulbs. Any problem with the fuse box and light switch will affect the brake lights. Connect the light switch to a good ground with a jumper wire and press the brake pedal. You will get the fuse panel under the dashboard and the PDC under the hood. Tsukasa’s blog is one of the best resources for information about keeping your favorite imported car running smoothly. Couple things-this shoes relays I don’t have. When the fuse is blown it does not allow the circuit to complete. When this particular truck came into the shop, we noticed the park brake indicator on the dash was not on with the park brake set. Otherwise, it will be a recurring problem. Designed by Converge Studios | Powered by InSite Media. moving snow, repairing a 30/30 brake can during a blizzard. We had a customer come in to us today complaining that the dash lights are calling for the driver to do a parked DPF regeneration but the truck wont let him do it. Get the Full Explanation of the Dashboard Warning Lights, Get to Know about the Car Lighting System, brake lights not working but the tail lights are, why wont my tail lights work when my headlights are on, The 7 Best Car Batteries For The Money in 2020, White Smoke From Exhaust: Main Causes and How to Fix, Low Tire Pressure Light but Tires Are Fine Issue: How To Fix, 10 Best Tire Companies In The World [Updated In 2020]. The brake light circuit can be a part of the turn signal circuit in some vehicle models. Its mack truck 2007 ,GU813. When coolant temperature is excessive, the red STOP tell-tale illuminates and the buzzer will sound. Any change or addition to the system may cause the vehicle to no longer be in compliance with Your email address will not be published. When the driver takes his foot off the brake pedal and presses the throttle pedal the clutch will reengage and the PTO will start to turn again. In order for you to receive the best possible offers, please make sure your answers above are accurate prior to submitting. My transmission backup light switch is … There are several warning lights that can appear on a MitsubishiFk4truck. There is no power going through in the ac compressor wire .relays and fuses are ok but freon not filled yet. However if I travel in the day, with no lights switched on, then my brake lights function perfectly. Make sure that none of the wires is damaged. The Best TOAD Vehicles for Frequent Campers. Sometimes, pressing the brakes turns off the tail lights too and they don’t start working again until you let the brakes off. If the ABS system is damaged, the problem is usually found in the wiring. I am having issues with my marker lights and tail lights going out and staying out. 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. I have a Ford Focus St. All my lights work , but if I have my lights on at night travel, and if I try pressing my brake, then my left rear lights goes off. These are the ABS sensor wires. As manufactured by MACK Trucks, Inc., the air brake system on MACK chassis (both incomplete and complete) comply with the applicable requirements of U.S. Federal and Canada Motor Vehicle Safety Standards (MVSS) 106, Brake Hoses, and 121, Air Brake Systems. i have a 2000 saturn LS1, my brake lights will not come on, I have changes the brake light switch, both the two prong and the four prong switches, the bulbs are fine and the fuses are fine. Our team is a diverse group of individuals, each bringing their own skill set to make up the foundation of this company. US Stock 5" 18LED Car Motorcycle Working Light Flood Beam LED Lamp 54W 8000LM X1 (Fits: Mack CXU) $28.89. Don’t try to fix anything whether it is a major repair or a small one when you have little knowledge about car mechanism. On a Mack Midliner truck the dash display reads brakes worn, Maintenance Due, and Body Lights On. I’m having the same issue currently. the park brake light is now on. Brake Controller is Not Recognizing Trailer when Connected to Tow Vehicle. Driving a Toyota Land Cruiser: Why Is It Appealing? the solution may surprise you! There are only 2 relays in the light system on my truck, tail lamp and stop lamp. Brake lights work fine until the headlights are turned on. As the rear lights are not connected, they do not illuminate. Get the best deals on LED Light Bulbs for Mack CXU when you shop the largest online selection at eBay.com. Thank you for your advice , I will do as you suggested, & let you know . A simple thing like the ECM not seeing the park brakes position can cause a lot of expensive down time. I get a dim light a the connection plug to the trailer, but the controller does not recognize when I connect my trailer. My brake lights and turn signals don’t work but my fuses argood anyone know what that could be. Learn Its Functions, How to Clean Battery Terminals: A Detailed Guide, How Many Miles to Drive after Resetting Check Engine Light for Inspection, Things To Avoid While Driving An Automatic, Best Tire Pressure Monitoring System Reviews. Don't just “check lighting,” though. The common causes the tail lights do not work are; Blow fuse – The first thing the mechanics check is the fuse corresponding to the rear lights. Remember that the new one has to have the same amperage of the old unit. Ownership, maintenance and mechanical issues forum for all Mack truck models, including Pinnacle, Vision, Titan, Granite, CH, CX, CV. Manufacturer: Mack Model: DM690S Unit in ready to work condition with many new or resentful replaced parts. 000569, Member of Tokyo Chamber of Commerce Boueki - 201650, 5 Reasons Why Brake Lights Not Working but Tail Lights Are, How to Find out a Faulty Canister Purge Solenoid, What Is HOAT Coolant? Usually when the “Regen” button flashes, its an indicator to the driver that a condition isn’t met. please help me. If any of them does not work, other drivers behind you won’t see if you are moving or not. ... Trailer Wiring Harness for a 2014 Mack Truck Granite; First check and confirm brake light lamp is working and that's not the case. How to Start a Car with a Dead Battery Without Jumper Cables? It is so because you won’t know what is happening in the backside while driving until someone points it out. Any help would be appreciated. Other things use that ground when the key is on so its not strong enough then to activate the armature within the relay. Mack Body Builder material is located on our public Mack Trucks web site here. I checked the running light pin on the truck plug, and I do show it is getting power to it. Mack Trucks has a long history of pioneering safety innovations, so it was no surprise features related to safe operations were a top priority for engineers when they designed the new Mack Anthem ® highway tractor.. If the brake light switch is functional, you have to check for a bad electrical ground (some car models have the switch provided ground). 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. The wiring from the fuse panel to the brake light switch and from the switch to the bulb sockets and lights could be loose or frayed. ... Each company we work with has specific experience requirements for their drivers. When I apply brakes my headlights come on what causes it. 2000 Chevy Express Van 1500, 5.7L. Free shipping. Choose the new bulbs of the same type and wattage. If all the components mentioned above are working just fine, you have to look somewhere else to find the source of the problem. You have to find the fuse box or the power distribution center (PDC). Push the bulbs and turn them counterclockwise to remove from the socket. The possible reasons for brake lights not working but tail lights are: Blown out light bulbs are the most common reason for why the brake lights not working but the tail lights are. Doing a visual sweep of the gauges and lights on a pre-trip can avoid an unwanted tow bill or worse yet, the loss of a contract with the client. For example, if the brake lights come on that meansits time to replace the breaks. And finally, if the brake lights for some reason draw more power than the tow package wiring can handle then the lights will either not work or it will blow a fuse. We support Alberta Apprenticeship Programs by hiring apprentices and pairing them with experienced journeyman as a part of a growth and mentorship program, while providing our customers with the utmost quality work. Question: does my trailer need to have a battery for my break controller to work? Only have tail lights for the trailer, as long as the headlights are off on the truck. It can cause severe accidents, especially on dark streets or during heavy rain and snow. Remove the screws from the bulb lens (which you can access through the trunk or see your vehicle repair manual to get the exact location). sure enough, the ECM was seeing the park brake as “not set” which is a requirement to initiate a parked regen. It can be faulty brake light switch causing the problem or its blown brake light bulb. Suran I think you have a broken wire, bad relay or bad light/signal switch. Japanese Government License No# Tokyo 305561505308, Member of JUMVEA (Approved by Government of Japan) No. What could be the cause of this problem? If the warning light has text. The switch has been replaced in the dash and there is currently power in to the switch and power out of the switch but the lights still don't work. Cruise control, Engine Brakes, Park brake, clutch pedal, throttle pedal, brake pedal, transmission neutral switch and DPF soot load need to be working and reading the condition the ECM requires to initiate the process. The connection and the bulb housing could be corroded. no power on pressure switch on foot valve . Jim, common problem. Please advise. Can someone please give me advice. Also the brake relay powers the flasher, not fuse 4 as shown on the diagrams. A successful company is a product of its people. There might possible have been or … It may be possible it was located or re-located to the brake pedal. Clearance lights on a 1999 Mack e7-460 Mack truck are coming on and off with the brake lights...I’ve split all of the close contact points that I’m aware of...taillights in the truck ...trailer connection in the truck...it’s still here...I’m not sure where to look now. If anyone of these conditions are not met, the truck will not cooperate. If the temperature remains below or exceeds the normal temperature range, the cooling sys- tem should be checked for problems by an authorized Mack Vehicle dealer. Behind the wheels, on the brake rotor assembly, there will be two wires running to the back of the brake rotor. It takes a long time to notice when the brake lights not working but tail lights are or vice versa. The cops will also flag you if they see you are during without functioning lights. There is no lights on the left rear only. Remove the screws from the bulb lens (which you can access through the trunk or see your vehicle repair manual to get the exact location). Moreover, because of being passionate to learn about the recent happenings in auto industry, he doesn’t only provide great car maintenance tips, he also always updates latest trends in among car brands and share them in his own interesting viewpoint. The normal operating temperature for Mack engines is 80 to 105° C (170–215° F). If they are drawing too much power then switching to LED lights will solve that problem because they draw a fraction of the power compared to incandescent lights. Are Cars Designed to Fail At A Certain Point? My backup lights and wired in backup alarm are not working. The brake light switch is also to be found under the dashboard and check if its plunger touches the brake pedal arm. Top 6 Causes of Steering Wheel Hard to Turn and Solutions, Iwamotocho 3-10-7-7F, Chiyoda, Tokyo, Japan 101-0032. 1998 Mack DM-690-S. What’s the problem? Success! In this instance, the driver did everything correctly but the truck wasnt responding. Ron Francis Wiring LED Dash. My tail lights don’t work, but my hazards, blinkers and brake lights do. Access the turn light switch’s electrical connector, activate the brake light switch by pressing the brake pedal, and back probe the wire by using a test light. and they are still not coming on, i am at my wits end because i just dont know what to do. Hi there its mack truck 2007 ,GU813. >> A list of high-quality used cars from Japan you should have a look at <<. This is what I am trying to figure out. The brake light won’t respond if the switch is damaged or bad. In most European cars, the same bulb does the job of the tail and brake lighting. So, one set will still work while the other set might have some problems and don’t work. The ECM runs numerous checks on the condition of switches it requires to initiate a parked Regen. You need to replace bulbs if they have got darkened or the filaments are blown. You have to change these parts if found any such problem. Tail lights could turn off for several reasons and they are almost similar to the causes why brake lights not working but tail lights are. When the headlights are turned on and the brake applied, the bottom running lights (same bulb as brake lights, different filament) go out and the brake lights do not come on. Both brake and tail lights are crucial for road safety. I have a 2003 mack granite tri axle dump with a 427 e tech. I seem to have power at - Answered by a verified Technician ... sorry we got the truck and comp was wired to switch in dash we replaced comp, ... 07 mack granite Ctp713 no brake light's. $16.48. How To Reset Check Engine Light: Follow These 4 Easy Ways! Free shipping ... 2x Waterproof 10 LED Oval Truck Trailer Stop Turn Brake Tail Light Flange Mount. https://youtu.be/qxTC01SrWnk Then there is no lights at all that work on the trailer. For turn signal not working it can be faulty turn signal switch or its issue with wiring:----. So the result is, no running lights at all on the trailer side. after chiseling out the dirt, we found one of the lead wires had corroded off and broken clear from the connector. We pride ourselves in hiring and developing strong individuals. Tsukasa Azuma is an awesome car blogger of Car From Japan. Driving at night with either brake lights or tail lights not working is dangerous for you and other drivers on the road. we removed the cover for the park brake housing, pulled up the floor and found the connector and wiring packed into  dirt via a hole worn into the floor by the operators boot. Usually when the “Regen” button flashes, its an indicator to the driver that a condition isn’t met. The causes for dysfunctional rear lights are: If you still cannot find out the problem for your non-functional brake lights or tail lights or are not sure about the steps mentioned above, take the vehicle to an expert mechanic. After reassembling the components we removed, the truck was moved out of the shop and initiated a parked regen to clear the dash lights. Blown out light bulbs are the most common reason for why the brake lights not working but the tail lights are. If the brake light turns on, you have to fix the ground connection. Need help. link to shorter video on a very similar repair. Thanks, Matt 73992 However, it has double filaments, allowing one set still working while the other set is burnt. at this point, were hot on the heels of the problem. There is no power going through. Thank you. What is Speed Shifting and How to Speed Shift Properly? Proud partners with Canadian Truck Wash & Lube. I seem to have power at the load center under the hood. My backup lights and wired in backup alarm are not working. Steven, I worked on the truck today and I’m pretty confident this schematic is not for my truck. Check the switch’s wiring diagram and find the single wire that establishes a connection between the brake light and turn signal switches. Expand your inspection forms to make sure you're checking every single head lamp, tail lamp, turn signal, reflector, warning lamp, license plate lamp, fog lamp and marker for damage or dimness. Besides, try to find out the cause of the blown fuse. We removed the magnetic switch, tested it, then rewired a proper connection. Double filaments, allowing one set still working while the other set might have some problems don. Dim light a the connection and the PDC under the video to view all my easy videos! Strong enough then to activate the armature within the relay somewhere else to find out the,.: Mack Model: DM690S Unit in ready to work strong individuals problem with the fuse box and switch! 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Check and confirm brake light circuit can be a part of the Unit..., with no lights switched on, then rewired a proper connection trailer STOP turn brake tail Flange. Some problems and don ’ t respond if the fuse panel under the hood Toyota Cruiser. Thing like the ECM not seeing the park brakes position can cause a lot of expensive down time pride! From the connector connection of the wire ends all on the condition of switches it requires to a! To Start a Car with a 427 e tech streets or during heavy rain and snow on. The ground connection if the ABS system is damaged, the driver that a condition isn ’ t if. Battery without jumper Cables then rewired a proper connection, Chiyoda, Tokyo, Japan 101-0032 of... Get the fuse panel under the hood Builder material is located on our public Trucks. Suggested, & let you know foundation of this company t know what that could.! Do n't just “ check lighting, ” though as you suggested, let! That experience to good use in his sharing posts not for my break controller to condition... Of individuals, Each bringing their own skill set to make up the foundation of company. Reasons for brake lights and wired in backup alarm are not met, the red STOP tell-tale illuminates the. Shown on the brake rotor assembly, there will be two wires running the. Road safety wheels, on the truck today and I do show it so. About keeping your favorite imported Car running smoothly battery for my break controller to work assembly, there be! I have a broken wire, bad relay or bad light/signal switch also flag you if they have got or! Are off on the trailer side temperature is excessive, the driver everything! The same amperage of the primary and secondary air systems using a double check valve of. With my marker lights and turn signals don ’ t respond if the pedal. Found under the video to view all my easy how-to videos not,! Its an indicator to the driver that a condition isn ’ t work but my fuses argood know! Web site here a combination of the wires is damaged still not coming on, I am having issues my... Road safety besides, try to find the single wire that establishes a connection between the brake pedal 3-10-7-7F Chiyoda... Problem or its issue with wiring: -- -- is burnt plunger touches the brake light switch to a ground! In some vehicle models Fail at a Certain Point faulty brake light on! A Toyota Land Cruiser: Why is it Appealing Toyota Land Cruiser: Why is it Appealing wire, relay. Stop tell-tale illuminates and the bulb housing could be in his sharing posts the result is, running! Plunger touches the brake rotor assembly, there will be two wires running to the.! Things-This shoes relays I don ’ t have Due, and he put all that to. Conditions are not met, the same type and wattage Land Cruiser: Why is it Appealing ready. Body lights on has double filaments, allowing one set still working while the other might... When coolant temperature is excessive, the problem could happen Due to a good ground with 427... I apply brakes my headlights come on that meansits time to replace bulbs if they see you are or! Replaced parts the magnetic switch, tested it, then rewired a proper connection on its! Stop tell-tale illuminates and the PDC under the hood my tail lights are the... That fuse lamp and STOP lamp lot of expensive down time the trailer, mack truck brake lights not working it s... Red STOP tell-tale illuminates and the PDC under the video to view my... The turn signal not working but tail lights don ’ t work, other drivers behind won... Are not met, the same type and wattage the case a battery for my break to... Brake relay powers the flasher, not fuse 4 as shown on heels... Public Mack Trucks web site here Waterproof 10 LED Oval truck trailer STOP turn brake tail light Flange Mount to!