How to turn off service trailer brake system - The emergency brake assist fully depresses the brake pedal when the car detects that the brake is being applied to bring the car to a sudden stop. When the sensor detects an unexpected engagement of the brake pedal, additional braking force is released. The system's purpose is to protect the driver from the risks associated with emergency ...

 
Apr 9, 2013 ... The easiest way to temporarily disconnect power to the trailer brakes is to disconnect your brake controller. Unplug the brake controller plug .... Cosmic air waiver

Here are the steps: Ground the circuit tester to the frame of the tow vehicle. Sometimes the wiring goes sideways. In order to know which function you are testing, find the top notch and refer to the diagram below. Touch the tip of the circuit tester to the blade of the function that you want to test.The service park assist warning message on your gauge cluster indicates a possible problem with your park assist system. Dirty park assist sensors, damaged wirings, and trailer hitches can trigger your vehicle's service park assist message. The location of park assist sensors can vary depending on your vehicle's year, make, and model, but ...Turn the key in the ignition to the "on" position and press the gas pedal with the engine off. Unravel a paper clip and put one end into the top right opening, and the other end into the fourth from the left on the bottom. Release the brake pedal and let the ABS/TCS lights blink repeatedly.Locate the trailer brake control module. In the GMC Sierra, this module is usually located under the dashboard, to the left of the steering wheel. Once you’ve located the trailer brake control module, press and hold the manual control button for about 5 seconds. This button is typically labeled with a triangle or “M” symbol.If no condition exists. Connect the electrical connector from the trailer into the trailer connector of the vehicle. Start the vehicle and select the "Start Light Test" function through the trailering App. Verify the appropriate lights on the trailer turns ON and OFF. If the trailer tail lamps do not turn ON and OFF.Apr 29, 2018 ... 3:55 · Go to channel · How to reset your front 4wd actuator in your 07.5 to 10 LMM Duramax! (Service 4 wheel drive). Shinobilly•150K views · 1...Q&A: Replacement Hubs for BD-545-17 Drum Brakes and Braking Assemblies; Q&A: Semi Trailer Light Function Locations on Heavy Duty 7-Way Pin Connection; Q&A: Parts Needed to Connect Gooseneck Trailer to Semi-Truck 7 Pole Round Plug; Article: Testing Trailer Brake Magnets for Proper Function; Article: Brake Controller Installation: Starting from ...Two connections must be made to join a trailer's brake system to the brake system of the towing vehicle. One connection carries air to fill the trailer's tanks and is called the supply or emergency line. The other carries pressure for the service brakes and is called the service line. Two pairs of metal trailer couplers or "gladhands ...The first step is to remove the cable from the battery. If you're using a battery that's not connected to your car's ignition, disconnect it from the positive terminal of the battery. Then, hold down the brake pedal until all the stored electricity is gone. Then, reconnect the cable and restart the vehicle.This should reset the light. 2. Check the service brake fluid level. Another way to reset the light is by checking the brake fluid level and adding more fluid if necessary. To do this, locate the brake fluid reservoir under the hood of the truck and remove the cap. Check the level of the fluid and add more if necessary.GMC Sierra and Chevy Silverado 2014 and up Service trailer brake system fix.I had this for a couple of weeks and was very annoying.Looking at these two plugs...Step 1 - Reset lights on instrument panel. If just the ABS, brake, and possibly check engine light are staying on do the following for a reset. Disconnect the negative battery terminal. Put the key in the ignition and turn to "on position;" wait 30 seconds. Step on the brake pedal and hold for another 30 seconds (this puts a current drain on ...Since the 2016 model year, every Tundra equipped with the 5.7liter V8 engine has also included an integrated trailer brake system as standard equipment. This...Service Trailer Brake System warning comes on every time I start the truck. I've scrubbed the internet and found a lot of references to a relay in the rear of the truck. 2015 LML Original batteries 123,000 miles The weather was below zero with snow while my truck sat for 5 days outside and the batteries were dead as a doornail when I went to ...Pull the DTCs with a code reader and post them ("SERVICE TRAILER BRAKE SYSTEM" is thrown in response to a couple dozen different DTCs, and to make it even more complicated, some -- but not all -- of those DTCs result in the trailer brakes being completely disabled). ... Agree -- the manual control will fire the pump off while …Locate the trailer brake control module. In the GMC Sierra, this module is usually located under the dashboard, to the left of the steering wheel. Once you've located the trailer brake control module, press and hold the manual control button for about 5 seconds. This button is typically labeled with a triangle or "M" symbol.Jul 17, 2017 · 2014 silverado "service trailer brake warning" fixed anubis. 13 posts · Joined 2013. #12 · Aug 14, 2017. So turns out my whole problem all along was a fuse under the hood. MISC IGN , it was fuse 40. I changed the fuse, and the service trailer brake system, went away and the brakes work fine again. 2013 GMC Sierra dually DenaliHD 3500. EFILive tune.#thetrailersmith #adjusttrailerbrakes #trailerbrakes #trailerbrakesnotworkingTrailer brakes not working? Here are some simple steps you can take to manually...GO TO MY WEBSITE AND BMW FORUM !!!https://www.nathansbmwworkshop.comCLICK HERE TO BUY YOUR NEXT CAR PARTS FROM MY AMAZON STOREhttps://www.amazon.com/shop/inf...I'm having the same issue. My trailer brake gain screen would popup on the DIC without a trailer connected; started a couple months ago but only happened a handful of times. Then, last weekend, I got the "Service Trailer Braking System" with the DING DING DING while I was sitting at a light on my way home from work. No trailer connected.5. If the CHECK TRAILER WIRING message only reappears when connecting the trailer wiring harness to the vehicle, the electrical fault is on the trailer side. SERVICE TRAILER BRAKES or REDUCED TRAILER BRAKING: This message will display if the electric trailer brake performance is either reduced or non-functional.All manual slack adjusters have an adjusting nut that is a 9/16" adjusting nut, so you're going to need a 9/16 box and wrench to adjust up the manual slack adjuster. So the first thing you do, chock the wheels and ensure that you have system pressure over 100 pounds and release the parking brakes on the unit.Type 3 Cluster large display - Use the information display controls on the steering wheel and the information display menu. Navigate to Towing tab, select Trailer Setup and press OK, then press OK to enter Trailer Options, select Change Trailer Selected and press OK, finally select No Active Trailer and press OK.In this video I have a look at a 2011 Chevy 2500HD that has a message coming across the dash that says "Service Trailer Brake System" and I find it has a cod...The slack adjuster is the part of an air-brake system that is used to adjust the brakes when needed. The slack adjuster is located on the air canister on the axle housing near the ...The driver manually disables VSES and engine torque reduction by pressing the traction control switch. The EBCM sends a serial data message to the IPC requesting illumination. Service Brake Booster Message. The service brake system message is displayed whenever the red brake warning indicator is illuminated.If your brake warning light is on, it usually means your parking brake is engaged, or there is an issue with your brakes that requires inspection. Your brake warning light can mean different things, so it's best to have a brake expert diagnose the issue. If your brake service warning light is always on, it could be due to a need for parking ...When it comes to keeping your vehicle safe and secure, the brakes are one of the most important components. A splash panel brake disc is an essential part of any braking system, an...Jan 14, 2022 · 2016 Yukon Denali. Vehicle got stuck in the snow. A ball was used in the hitch to pull it out. Next day the battery was dead. After jumping, it had the Service Trailer Brake System message. Didnt think anything of it except now the battery won't hold a charge. It will jump and run fine but left... How to use the parking brake in a Dodge Ram 1500? Watch this video to learn the simple steps and tips for turning on and off the parking brake in your truck. This video also shows you how to ...2017 GM 3500 "service trailer brakes". Looking for some input on my Dually. This past weekend I plugged in my Jeep trailer and got a "service trailer brakes" message. When this happened, I had zero brakes and zero lights of any kind, marker, brake or turn. No codes blown, no fuses blown, I did the typical open door, cycle key trick and even ...Step 1: Secure and Jack Up Trailer. Chock your trailer wheels so the trailer doesn't roll out of place. Jack up the trailer/camper high enough so the wheel you're starting with can freely spin (it doesn't matter which wheel you start with). Chock wheels to secure trailer. Jack up trailer so wheel can spin freely.I would let off the gas and slowly accelerate which would stop the shudder. It seemed to come and go. I shut the car off, let sit for a few minutes and it would start up fine, all messages/ warning lights cleared. 5 minutes later it would repeat the process. I had all 4 brake pads replaced last week, but drove roughly 500 miles without a problem.When you brake, a 250Hz 12V DC PWM signal comes out, with the duty cycle proportional to your braking, as well as gain and trailer settings. The PWM sensing pulse is there all the time even if there is not a trailer connected. Even with an open circuit, the brake controller will still output a full signal when braking.Jul 4, 2019 ... Support My Channel! Paypal - [email protected] / Cashapp - $cdarnau Parts Needed Trailer Brake Switch - https://amzn.to/2LpDf8Y Tools Needed ...However, most systems have 3 wires coming from the box and 2 wires from the switch. The three wires coming from the box are usually: black for the 12-volt power, white for ground, and blue for the brake output. The two wires coming from the switch are just spliced into the brake output to apply power should the trailer detach.Demco Hydraulic Brake Line Kit for Single Axle Trailers - Drum Brakes. (18 reviews) Code: DM5426. Our Price: $61.27. Add to Cart. Accessories and Parts. Brake Actuator. Trailer Brakes. Hydraulic Drum Brakes.This video shows how to correct the annoying "Service Trailer Brake System" message that randomly appears on your dash while driving. The fix is to change t...Nov 11, 2022 · In this video we will be looking at how to repair the very common “service trailer brake system” warning for Chevy Silverado and GMC Sierra. Any time the temperature drops below 64 degrees, I receive Stabilitrak warning messages. Once the temperature warms up, the codes go away. - Stabilitrak light comes on in dashboard. - "Stabilitrak Off". - "Service Stabilitrak". - "Service Traction Control" or "Traction Control Off".Your Chevy Silverado's brake light indicator is there to inform you of an issue with your truck’s brake system. It is a light different from the anti-lock brake system, which has its own ABS warning light. The brake light indicates a problem with the physical braking system itself. Check the Emergency Brake First If you.The integrated trailer brake controller feature on your Ford F-150® truck helps slow down a towed trailer. Learn how it works.Learn more about Ford support h...ITBC "Service Trailer Brake System" Resolution. After spending a lot of time looking at harnesses and checking fuses. This is what I found that resolved my issue with the ITBC System on my 2007.5 Duramax. I was driving down the road and the "Service Trailer Brake System" message popped up on the DIC. At this time I was not towing or hauling ...Apr 29, 2018 ... 3:55 · Go to channel · How to reset your front 4wd actuator in your 07.5 to 10 LMM Duramax! (Service 4 wheel drive). Shinobilly•150K views · 1...May 18, 2011 · This indicate a short to battery on the brake output . This most of the time is caused by poor grounds on the trailer wiring or water is the trailer tow connecter. If there is more that 1.5 volts on the brake output prior to the the brake going on it will se the SB fault. If the is a "SC" on the display . this indicates a short circuit fault . Step 3: Switch off the ignition. If the warning light stops blinking or starts blinking if it wasn’t blinking before, switch off the ignition. Remove the car key and allow the car to sit for a few minutes. This will reset the service theft deterrent system.It is easy to convert to a modern dual line system on the trailer. Add a tank, and a RE6 (Relay Emergency Valve) The supply line charges the tank through the RE6, then the service line controls the RE6 to allow tank air to go to the brakes, (master cylinder in this case) and the air is exausted through the valve. Step 3: Tighten the adjustment wheel. Using a brake spoon, brake adjustment tool or flathead screwdriver, turn the star wheel adjuster inside the brake chamber. The adjuster is typically located below the brake drum. Push down on the brake spoon handle so the adjuster wheel is pried upward. This will tighten the brake pads or shoes. If I turn the truck off and start it again, it resets and the trailer brakes work again. I attached a headlamp bulb to the brake pin on the 7 pin trailer wiring connector. Then started the truck and pressed the brake pedal over and over. The ITBC worked fine with no warnings and the brake gain blocks on the DIC went up and down.Beneath the adjusting cap, you will find a slot. 5. Insert a screwdriver or brake-adjusting tool. Insert your screwdriver or adjusting tool into the slot. 6. Locate the star wheel. A specialized gear called a star wheel is in the slot. The star wheel's teeth are uncovered on the edges.It’s important to choose a wiring harness that matches both your vehicle and trailer’s electrical systems. 5. Wire Strippers and Crimping Tool. To properly install the wiring for your electric trailer brakes, you’ll need wire strippers and a crimping tool to remove insulation from the wires and securely connect them.How to use the parking brake in a Dodge Ram 1500? Watch this video to learn the simple steps and tips for turning on and off the parking brake in your truck. This video also shows you how to ...Gently pump the brake lever on your trailer or in the case of Electric over Hydraulic systems (EOH), get your mate to turn the tow vehicle ignition on and pump the tow vehicle brakes to activate.. This will push the old fluid out through the hose. Make sure that the brake reservoir does not empty out and continuously top the fluid up during ...About Press Copyright Contact us Creators Advertise Developers Terms Privacy Policy & Safety How YouTube works Test new features NFL Sunday Ticket Press Copyright ...TDFDiesel. 19429 posts · Joined 2007. #4 · Jun 15, 2013. Service Trailer isn't a check engine light, clearing codes is a check engine light. Something causes the Service Trailer Brake System, I had mine pop on along with Traction Control due to a problem with a wheel speed sensor. Tony - CLICK TO READ: FORUM RULES OR DF STAFF!Mar 15, 2017 ... Bad Brake Switch - Cruise Control/Trailer ... Fixing Brake Switch ... 2014 - 2018 Chevy Silverado GMC Sierra Service Trailer Brake System Fix.This leads to malfunctions including brake failure and signal lights not working. To check a 7 or 5-way trailer plug, first give it a visual inspection. If you notice dirt, built-up corrosion, or debris in the plug, give it a thorough cleaning. After cleaning away corrosion, use 220 grit or higher sandpaper to scuff up the pins.Sounds like the breakaway pin of your system has been pulled or the wires on either side of the switch are shorting out to each other which is causing the brakes of the trailer to apply. If you are looking for a way to get the trailer to your mechanic so that he can repair the short you could remove the battery of the breakaway system so that ...If it’s engaged, the brake light will stay lit. If the handle isn’t all of the way down, it’ll cause the brake warning light to stay on. Check to make sure that there isn’t a little bit left that it needs to turn the brake light off. Now if the emergency brake didn’t fix the situation, it’s time to look into what is causing your ...It’s important to choose a wiring harness that matches both your vehicle and trailer’s electrical systems. 5. Wire Strippers and Crimping Tool. To properly install the wiring for your electric trailer brakes, you’ll need wire strippers and a crimping tool to remove insulation from the wires and securely connect them.Step 1: Identify the adjustment nut on the trailer. The first step is to find the adjustment nut, which is right at the back of the vehicle's trailer brake. It is usually situated close to the axle. Once you finally locate this part, you can proceed to step two.It is usually white or yellow plastic and located on the driver's side. Then, check the fluid level. There should be minimum and maximum markings on the side of the reservoir to show the optimal range of fluid. If you find the fluid is too low, add new brake fluid to the reservoir. However, you will need to flush your brake fluid before ...Service electronic braking system message highlights. Common reasons:EPB problems, 12V battery dying, connection and wiring problems; How to fix:check the battery, check wires, inspect the EPB motor; Possible consequences:the parking brake may not be available, car may not start; Priority level:High; Can you drive?Yes, if it startsPrices listed are MSRP and are based on information updated on this website from time to time. All 2023 Ford F-150 videos at your fingertips! Choose from the list of informational how-to videos to learn everything you need to know about your Ford vehicle.I keep having Service trailer Brake system alert on 2017 Sierra 2017. I have replaced the module under spare tire and 30 amp fuse under hood. ... i have a 2005 gmc sierra 1500 crew cab. i recently hooked up a trailer and the right turn signal and brake light did not work. the lights on the trailer are brand new. i narrowed it down to the 7 pin ...Expert Reply: There are several ways that you can cut off the power to your trailer brakes. The easiest option would be to simply unplug your brake controller. If the brake controller is disconnected, the brakes will not receive power. If your brake controller was hardwired and cannot be unplugged, you could cut the brake output wire anywhere ...Expert Reply: There are several ways that you can cut off the power to your trailer brakes. The easiest option would be to simply unplug your brake controller. If the brake controller is disconnected, the brakes will not receive power. If your brake controller was hardwired and cannot be unplugged, you could cut the brake output wire anywhere ...Posts: 14. Likes: 1. Received 8 Likes on 5 Posts. 771 miles on the truck on a dry day when I parked the truck. Got off work and fired the truck up and this popped up. It was raining when I got off work. So about three miles into the drive home I pulled over and restarted the truck. Same message popped up. When I got home (after 22 miles on the ...The slack adjuster is the part of an air-brake system that is used to adjust the brakes when needed. The slack adjuster is located on the air canister on the axle housing near the ...854 posts · Joined 2012. #15 · Mar 2, 2014. The brake controller switch that is on the dash by your knee. The one you use to activate trailer brake or to turn up or down the gain. Sent from AutoGuide.com Free App. 2007.5 ccsb Chevy 2500hd, white LT, 4" DE turbo back exhaust. 3" down pipe With magnaflow duals.Broken trailer brake. The stable state of the vehicle brakes is necessary for their standard performance. One broken part stops the workability of all other brakes in one system. As a result, the trailer becomes uncontrollable on-road, and damages to the surrounding vehicles can occur. This can also make lead to trailer brakes smoking.Brake and Turn Signal. Your turn signal and brake wire are the same regarding trailers. This wire serves the same purpose for turning as well as braking. Also, the turn signal wiring is separated by the left and right signals. It makes sense since you need to send a separate electrical signal to get either bulb working when you want to make a turn.I connected a boat trailer that had some really old / frayed wiring. Connected trailer's 5-way into truck's 7-way adapter, all worked fine initially. Eventually trailer wiring frayed off completely or shorted out, and I received a "Trailer Brake Module Fault" message on the dash. No big deal, or so I thought.Make several hard stops from 20 mph on a dry paved road free of sand and gravel. If the trailer brakes lock and slide, decrease the gain setting. Adjust the controller just to the point of impending brake lockup and wheel skid. Note: Not all trailer brakes are capable of wheel lockup.Here are the reasons for the "Service Antilock Brake System" message in your Ram: 1. Wheel speed sensors. One of the most obvious things to check is the health of the wheel speed sensors. These sensors are used by ABS, ESP, ESC, and other systems. The vehicle brain makes sure that all the wheels rotate with the predicted speed and that there ...The driver manually disables VSES and engine torque reduction by pressing the traction control switch. The EBCM sends a serial data message to the IPC requesting illumination. Service Brake Booster Message. The service brake system message is displayed whenever the red brake warning indicator is illuminated.In the middle of a long trip towing a travel trailer the following message popped up on the DIC while stopped "service trailer brake system" I immediately checked the brakes by rolling forward and manually applying the trailer brake and NO brakes. DIC still shows trailer gain and when I pull the break away pin the brakes lock. I disconnected ...Carefully remove the wheel to expose the brakes. Get a hold of the “star wheel” adjuster located on your brakes. This should be attached to the brake shoes. Next, using your brake adjustment tool or your screwdriver, tighten the adjuster till you are unable to spin the wheel.J. j1mm1sh Discussion starter. 9 posts · Joined 2017. #1 · Feb 21, 2017. Been getting a random "service trailer brake system" warning while driving with no trailer. With trailer I get that code every time I start, and must dismiss it. While towing, it seems as if the brakes are dragging, slowing me down, and killing mileage (7-8 with 1900# v ...Pull the DTCs with a code reader and post them ("SERVICE TRAILER BRAKE SYSTEM" is thrown in response to a couple dozen different DTCs, and to make it even more complicated, some -- but not all -- of those DTCs result in the trailer brakes being completely disabled). ... Agree -- the manual control will fire the pump off while …Locate the service trailer brake system's control valve, which is usually mounted on the frame of the tow vehicle near the rear axle. Turn the knob or lever on the control valve to the "reset" position. This will release any air that may be trapped in the system. Depress the brake pedal several times to bleed any air out of the lines and ...Service Brake System message on your dash? If you have a full size truck or SUV made by General Motors (Chevrolet, GMC, Cadillac - and perhaps even other ve...Check for dc power (12 volts) from the truck's female connector. One wire will be ground, others will be taillights (turn on headlights), brake lights (have someone press brake pedal), and blinkers (turn on switch and blinkers). Service 4 wheel drive message comes on and no lights for 2and 4 wheel drive come on.Jun 21, 2019 · If so, fix your abs problem first and your SERVICE TRAILER BRAKE SYSTEM message will go away. Likely, if this message is displayed, you will have NO TRAILER BRAKING, but not a lockup of trailer brakes. A common cause of this (among many, many causes) that that the trailer brake relay is bad. But check it before you replace it.

A brake light switch is a type of relay used to tell brake lights to turn on when you push down on the brake pedal. When brake lights stop working and you’ve already checked the bu.... How to set draft order on yahoo fantasy football

how to turn off service trailer brake system

To adjust your brake controller output, press and hold the vehicle brake pedal. Set the output to the starting value specified in the instructions. Then, in an open area, test the trailer brakes by driving forward at about 25 mph and applying the brakes. If the vehicle stops too slowly, increase the maximum output.May 14, 2019 ... I came here do to the smell on my breaks after pulling my trailer.. 9:34. Go to channel · How To Fix Chevy Service Trailer Brake System Warning.My 2015 GMC 1500 Sierra has been driving me insane the last couple weeks with it's no stop dinging due to a Service Trailer Brake System message on my displa...View, print and download for free: service trailer brake system - GMC SIERRA 2016 Owner's Manual, 509 Pages, PDF Size: 6.51 MB. Search in GMC SIERRA 2016 Owner's Manual online. ... 11/9/15 154 Instruments and Controls Brake System Messages BRAKE FLUID LOW Car Manuals Online. All car manuals in one place for freeThe integrated trailer brake controller feature on your Ford F-150® truck helps slow down a towed trailer. Learn how it works.Learn more about Ford support h...1. Blown Fuses. A blown fuse is one of the major reasons why the service trailer brake system message comes on. When you suspect a fuse is blown, turn off your car and look under the dashboard for the main fuse box. The second fuse box is usually located under the hood. Consult your owner’s manual for details on locating each.A service trailer brake system warning message means that your truck is equipped with a wiring harness or integrated trailer brake control (ITBC) system that can control trailer brakes, and there is a problem somewhere in those components. ... If it doesn't turn off after clearing the ABS light, move on to the following steps in this guide ...2014 Silverado 2500hd lml. A couple of days ago started displaying "service trailer brake system" on the DIC. When hooked up to a trailer all lights and turn signals work. Just no power to the trailer brakes. I've replaced the trailer brake control relay above the spare tire. I've replaced the 30a stud 2 square fuse (slot 58) as well as the 20a ...Any time the temperature drops below 64 degrees, I receive Stabilitrak warning messages. Once the temperature warms up, the codes go away. - Stabilitrak light comes on in dashboard. - "Stabilitrak Off". - "Service Stabilitrak". - "Service Traction Control" or "Traction Control Off".Welcome to the forum John. Start with the easy stuff, take the 7-pin connector apart and clean out all the dust and dirt and look for corrosion.Jan 12, 2024 · Brake assist is a driver-assist safety feature that intervenes to help a car stop faster during emergency braking. The system detects when a driver engages the car’s brake so hard without an appropriate braking response. So, it releases extra braking force to shorten the braking distance, thereby averting unexpected crashes. How to Turn Off ABS Light on Ford F150. If the ABS light is on in your Ford F150, it signals a potential problem with the Anti-lock Brake System. While you can try the battery disconnect method (turning off the vehicle, disconnecting the battery, waiting, then reconnecting) to reset the light, it's essential to diagnose the root cause.Take full control of your trailer's braking performance with our advanced brake controllers, allowing you to customize your settings for a personalized and responsive towing experience. Upgrade your trailer's braking system today and embark on a safer journey. With over 73 years of assisting our neighbors and customers, over 1 million photos ...J. j1mm1sh Discussion starter. 9 posts · Joined 2017. #1 · Feb 21, 2017. Been getting a random "service trailer brake system" warning while driving with no trailer. With trailer I get that code every time I start, and must dismiss it. While towing, it seems as if the brakes are dragging, slowing me down, and killing mileage (7-8 with 1900# v ...If there is an ABS fault, same message, but also ABS message. If the UY2 option is present, and the blunt cut wires are shorting, same message. If excessive corrosion exists in bumper plug, same message. If the master cylinder pressure switch is bad, no message. If stoplamp switch is failed, no message.The service brake system light is a common and essential indicator on your vehicle's dashboard. When this light turns on, it typically means an issue with your braking system needs attention. You can take several steps to turn off this light and ensure the safety of your vehicle. A common reason the service brake system light appears is when ...Locate the trailer brake control module. In the GMC Sierra, this module is usually located under the dashboard, to the left of the steering wheel. Once you’ve located the trailer brake control module, press and hold the manual control button for about 5 seconds. This button is typically labeled with a triangle or “M” symbol.Welcome to the forum John. Start with the easy stuff, take the 7-pin connector apart and clean out all the dust and dirt and look for corrosion.Loosen bleeder screw one turn. When no air bubbles are visible coming out of bleeder screw for at least three seconds, close bleeder screw securely and remove bleeder hose. Repeat steps 6 and 7 above on brake on the opposite side of axle and then on front axle if so equipped. If installation is tandem axle with brakes on both axles, repeat ...If your message on the DIC says 'SERVICE TRAILER BRAKE SYSTEM' the problem is your truck, not your trailer. If you get a message that says "CHECK TRAILER WIRING" , that's the trailer problem. ... Now it says trailer connected and the bars increase with gain but when i turn truck off and disconnect and turn truck back on it says service trailer ...This should reset the light. 2. Check the service brake fluid level. Another way to reset the light is by checking the brake fluid level and adding more fluid if necessary. To do this, locate the brake fluid reservoir under the hood of the truck and remove the cap. Check the level of the fluid and add more if necessary..

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