How to turn off service trailer brake system

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...

How to turn off service trailer brake system. Release both the tractor and trailer parking (spring) brakes and turn off engine. 10. Drain the trailer air reservoir(s) to achieve approximately 100 psi system pressure as indicated by the tractor air gauge(s). Have someone in the cab make a full service brake application and hold (do not use the trailer hand control valve if equipped). Measure

Nov 14, 2023 · Service Trailer Brake System – What Owners Can Do. If you find yourself facing this issue, the first step is to replace the Trailer Brake Control Module. GM has released an updated part to address this problem. Once your vehicle’s charging system brings the battery up to a higher state of charge, the trailer brakes should function normally.

Flat ground brake test with controller set at 10 manually activated it will slow the rig down but NEVER stop it. My old truck with the P3 controller would smoke the tires during this test. The truck idiling in gear will still overpower the controlled manually applied set on 10. I need to disable it and bypass to install my P3 controller.Mar 30, 2024 · Once you’ve found the controller, follow these steps: Step One: Press and hold the “set” button on the controller for two seconds. Step Two: Use the arrow buttons to adjust the brake force. Step Three: Press the “set” button again to save your changes. You should now be able to use your adjusted trailer brake controller. Mar 3, 2018 · Turns out two things were wrong. #1- the Trailer tow relay (GM Part # 20904439 - picture attached) needed to be replaced. Must have had a short in it because it would cause the fuse to blow. You can find this part cheap on Amazon. 30-40 USD. #2- Fuse 58 Stud2 (for the trailer brakes) was blown. 30A LP JCase. Step 1: Fill Master Cylinder with Brake Fluid. To start, remove the master cylinder cap. Fill the master cylinder 3/4 full with DOT3 or DOT4 brake fluid. Make sure to leave the cap off during this process—if you put the cap back on while bleeding the brakes, you can damage the seal inside the cap. Remove cap from master cylinder.Nov 14, 2023 · Service Trailer Brake System – What Owners Can Do. If you find yourself facing this issue, the first step is to replace the Trailer Brake Control Module. GM has released an updated part to address this problem. Once your vehicle’s charging system brings the battery up to a higher state of charge, the trailer brakes should function normally. Question: Every part on the 3500hd integrated brake controller has been changed at least once all but the wiring even went so far as to change the plug in the bumper. per the fsr for chevy. it started at 21000 miles the 2500 at less than 8000. Dealership says not to bring the 2500 in yet can not figure out the 3500.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.

First was Service - Stabilitrak, then Service - Trailer Brake System. After dismissing them, the ABS, Stabilitrak and Brake warning lights stayed lit. I noticed that the integrated brake controller was grayed out. Also, the trailer brakes weren't working. Then, a message like Trailer Connected or something like that popped up and the warning ...To use it to find a space on the left, activate the left turn signal or select the left side from your infotainment screen, depending on your vehicle. The feature will then start to look for a parking space on your left that is large enough for your vehicle. 6. Enhanced Automatic Parking Assist can detect parking spots while your vehicle is ...How To Reset Service StabiliTrak Light. 1. Turn off the engine. Ensure that your vehicle's engine is completely turned off before proceeding with the reset process. 2. Disconnect the battery. Locate the vehicle's battery, typically found in the engine bay.The most common way to test your brake controller once you make your initial adjustments is to drive slowly (about 25 mph) on a dry, level surface, such as an empty parking lot. If it takes too long for your vehicle to stop when your trailer is attached, increase the braking intensity output of your brake controller.The message center displays the service traction control system message when any one of many traction control - disabling DTCs is set. The EBCM sends a serial data message to the IPC requesting this display. ABS Description and Operation (With JL4) This vehicle is equipped with a Bosch ABS/EBD/TCS/VSES brake system.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.Aug 3, 2018 ... Support My Channel! Paypal - [email protected] / Cashapp - $cdarnau 2014 - 2018 GMC SIERRA, CHEVROLET SILVERADO, SERVICE TRAILER BRAKE SYSTEM ...

In this video we show where to start when diagnosing a non-functioning trailer light. In many cases it is just a simple fuse! Trailer wiring is an extension ...Jul 22, 2022 ... Hey everyone. In this video we go through the process of verifying why there is a SERVICE TRAILER BRAKE SYSTEM message on the dash.Got the screen saying trailer brake module fault and the turn blinkers on the dash blink very fast. The outside blinker light is normal speed. EDIT - Solution found on another forum. If anyone encounters this problem, look at fuse 91 in the under hood fuse box. Pulling and replacing fixed the issue.About Press Copyright Contact us Creators Advertise Developers Terms Privacy Policy & Safety How YouTube works Test new features NFL Sunday Ticket Press Copyright ...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.

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First of all pull the owners manual and go to the fuse section and check every fuse related to the trailer for blown. Could have popped one when you hooked the battery back up. That's simple. 2016 White Colorado LT 2WD Ext. Cab. 3.6L V6 6 Spd. Automatic with Dipstick, Pedal Commander, BakFlip G2 Tonneau, Elite CC, Tow Mirrors, Cargo Floor ...I have these three codes pop up at once and always together. I've reset the air suspension by pushing the two air suspension buttons together and All the codes went always and a month later they returned. I tried to reset again and now it won't reset again. I can still change the air suspension...The information contained in this publication was correct at the time of release.In the interest of continuous development, we reserve the right to change specifications, design or equipment at any time without notice or obligation.No part of this publication may be reproduced, transmitted, stored in a retrieval system or translated into any language in any form by any means without our ...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.

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 startsJoin Date: Apr 2017. Posts: 22. Dreaded "Check trailer wiring" message and ding. Hi All - We have a 1996 Coachmen Catalina small 5th wheel and a 2014 Chevy Silverado 1500 TV. A couple of years ago we started getting intermittent "Check trailer wiring" followed by "Trailer Connected" messages on the DIC. At first it was only once in a while, but ...I own a chevy silverado z71 rst V8 with 105k milles and after do a rotor and pads replacement as a normal brake maintenance, a bunch of codes come up on my dashboard and the following messages: Service Trailer Brake system, Service ESC, Service Brake assistente and Barke system failure 43 MPH top speed seted up and he don't drive more than ...In today’s digital age, having a reliable and efficient phone service is crucial for businesses. Traditional landline systems are becoming outdated, and more companies are turning ...So around 15k miles my truck started to give me "Check trailer brakes" warnings on the dash display from time to time when hooked to a trailer. Today just ov...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.2017. Engine. 6.7L diesel. Yesterday I got this message in the DIC display while driving home; "Service Electronic Braking System." Also got the the electronic stability control light in the dash. Drove it today and the light remains on. I don't have any problems with the functionality of the brakes.And close the panel. Solution 2: Clean And Replace The Trailer Brake Control Module Of 2014 Silverado. If you want to service trailer brake system Chevy …The best way to reset the service trailer brake system is to fix the malfunctioning component that triggered the ECU to generate this message. These components include the trailer brake control switch, brake fuse, controller relay, trailer connector, and wiring connections. You can also try disconnecting the negative battery terminal, but its ...

Helpful Expert Reply: If the surface on the inside of the drum where the shoe pads make contact isn't smooth then a brake shop may be able to turn the drums. If that surface or the surface where the magnet makes contact (called the armature surface) is discolored then the drum will need to be replaced. In most cases, unless there is damage or ...

In this video I troubleshoot and discover the cause of electric brake failure on a camping trailer. Also covered is jacking the trailer, removing the brake d...To release this lock nut, use a flathead screwdriver. Carefully loosen the lock nut, allowing you to make adjustments to the trailer brake system. This step is essential for the subsequent adjustments. 3. Turn the Nut Clockwise for Adjustment: With the lock nut loosened, proceed to turn the adjusting nut clockwise.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 …Long story short traded in my lifted 2017 for a 2022 powerboost. Thought I would've been able to drive her off the lot today but was told that there is a delivery hold on all current f150's due to this trailer brake system fault.... I expressed my concern of wanting to leave with the truck I just bought ( since I traded in my vehicle) but they ...FIXED! "Service Trailer Brake System" - Chevy/GMC Suburban/Silverado/Sierra/Yukon/Tahoe. Jimmy's Garage. 9.45K subscribers. Subscribed. 546. 119K views 1 year ago. Here's...Helpful Expert Reply: If the surface on the inside of the drum where the shoe pads make contact isn't smooth then a brake shop may be able to turn the drums. If that surface or the surface where the magnet makes contact (called the armature surface) is discolored then the drum will need to be replaced. In most cases, unless there is damage or ...3.1 1. Start Your GMC Sierra. 3.2 2. Access the Dashboard Controls. 3.3 3. Locate the Trailer Brake System Settings. 3.4 4. Select the Option to Turn Off. 3.5 5. Confirm the …Support My Channel! Paypal - [email protected] / Cashapp - $cdarnau2014 - 2018 GMC SIERRA, CHEVROLET SILVERADO, SERVICE TRAILER BRAKE SYSTEM REPAIR. C1117 REPA...Mar 30, 2024 · Once you’ve found the controller, follow these steps: Step One: Press and hold the “set” button on the controller for two seconds. Step Two: Use the arrow buttons to adjust the brake force. Step Three: Press the “set” button again to save your changes. You should now be able to use your adjusted trailer brake controller. Turn signal indicator Security indicator5 Parking brake indicator6 Rear differential lock indicator1,3,5 Traction control OFF indicator1 VSC (Vehicle Stability Control) OFF indicator1 Power mode indicator (Automatic transmission only) PCS (Pre-Collision System) warning1,2,6 Fog light indicator5 Low engine oil pressure warning Low engine oil ...

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The service trailer brake system warning is to let you know that the trailer brake control unit/computer has detected a problem. This can be due to the control unit itself, the trailer brake itself, or a wiring issue leading to the rear trailer connection. The fault has to be located and repaired to turn off the warning. 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. 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...5. Your brake pads are worn. Depending on your car make, model, and year, your service brake system light may become illuminated when the brake pads need to be replaced. However, like with brake fluid contamination, your car may not alert you to the need for new brake pads with a light.Depends on who installed the in-bed 7-way. Service Trailer Brake System means that the trailer braking system in the truck has a problem whereas the Check Trailer Wiring means that the truck has detected a fault in the trailer wiring and this is usually a very good indicator of where the problem is. When the dealer replaced 'the …Duramax Service Trailer Brake System. This system is designed to detect problems with different components associated with your trailer brakes. These components can be the brake controller, trailer wiring, or the power input to the controller. Once detected, the system then is supposed to generate codes to help pinpoint the exact location of ...Typical Brake Service Warning Light Repairs. While the brake service warning light can mean a few different things, the typical repair revolves around your brake fluid. From brake fluid leaks to a master cylinder replacement, if you're experiencing brake service warning light issues, you'll want to speak with a brake mechanic about checking for ...Nov 15, 2017 ... ... system in the GMC Sierra and how it interacts with the trailer braking system ... Installing a Trailer Brake Switch ... 2015 GMC Sierra Service ...Helpful Expert Reply: If the surface on the inside of the drum where the shoe pads make contact isn't smooth then a brake shop may be able to turn the drums. If that surface or the surface where the magnet makes contact (called the armature surface) is discolored then the drum will need to be replaced. In most cases, unless there is damage or ...The easiest way to turn off the trailer brake is to unplug the brake controller. If you disconnect this brake controller, no electricity or power will go to the brakes. However, if you cannot unplug the brake controller because it is hardwired, you can cut the output wire of the brake anywhere between the trailer brakes and the brake controller.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.Can't turn the light off Trailer Brake System. Mechanic's Assistant: I understand your frustration with the Trailer Brake System light being on, but the Chevy Mechanic will be able to help you resolve this issue. What is the make and model of your Chevy vehicle? 2011 Chevy Tahoe. Mechanic's Assistant: Have you recently installed or made any changes to the trailer brake system? ….

Depends on who installed the in-bed 7-way. Service Trailer Brake System means that the trailer braking system in the truck has a problem whereas the Check Trailer Wiring means that the truck has detected a fault in the trailer wiring and this is usually a very good indicator of where the problem is. When the dealer replaced 'the …2 mins. Video. 1 mins. Replacing Trailer Brakes: What to Look For Each Year Join RV Repair Club to continue watching for $10.00 per month / $98.00 per year. GET VIDEO ACCESS. In this quick video lesson, RV maintenance expert Dave Solberg teaches you simple tips for replacing trailer brakes during your annual RV inspection.4. How do I adjust service trailer brakes? To adjust service trailer brakes, follow these steps: Park the trailer on a level surface and chock the wheels. Loosen the brake shoe adjuster nut on the bottom of the brake assembly. Turn the adjuster screw clockwise until the brake shoes just touch the brake drums.The breakaway system is designed to bring the trailer to a safe stop in the event that the trailer breaks free from the safety chains or the ball mount. They are the ultimate emergency brake. It does this by activating the electric brakes on the trailer. The only catch is, for this to happen you must have fully operational electric brakes.The Trailer Brake Control System is compatible with two types of Trailer Brake Systems as listed below: 1. Electric Brakes A controlled electrical output signal energizes an electric-magnet/lever arm assembly that directly actuates the brake mechanism. The GDS name for this system is “Electromagnetic Brakes”.Service Trailer Brake System – What Owners Can Do. If you find yourself facing this issue, the first step is to replace the Trailer Brake Control Module. GM has released an updated part to address this problem. Once your vehicle’s charging system brings the battery up to a higher state of charge, the trailer brakes should function normally.Aug 1, 2022 · 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 own a chevy silverado z71 rst V8 with 105k milles and after do a rotor and pads replacement as a normal brake maintenance, a bunch of codes come up on my dashboard and the following messages: Service Trailer Brake system, Service ESC, Service Brake assistente and Barke system failure 43 MPH top speed seted up and he …They replaced it and power bled the front brakes. No problems now. The sensor part number is 1 15838718 if that helps anybody. Probably not a big deal to fix yourself if you can find the sensor. I see the one plug with wires on the master but I'm assuming that's the brake lights. How to turn off service trailer brake system, Apr 15, 2021 ... I am not getting any codes but I have the message on my dash. I've replaced the controller switch, ITBC, ITBC relay, all the fuses, ..., 1. Check the brake fluid level in the master cylinder reservoir. If it is low, then there may be a brake fluid leak somewhere in the brake lines or calipers that needs to be addressed. 2. Inspect all of the brake lines for signs of wear or damage such as cracks, bulges, or leaks., The brake plug started smoking. We unplugged everything, went to move the truck, now the ABS light and stabilitak lights are on and wont clear. Along with the Brake light and message "service trailer brake system" Not sure if they are all related but seems like it. We have checked all 4 wheel speed sensors and all have the same resistance., This comprehensive guide unveils the steps to temporarily disable or reset the trailer brake system, offering a solution to the dashboard warning. Armed with just a few tools and a straightforward process, you can gain control over the system’s adjustments., 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 ..., 10,681 Posts. #36 · Sep 6, 2019. If your ABS light is on , that will, in turn, cause your SERVICE TRAILER BRAKE SYSTEM message to display on the DIC. Fix the ABS problem and the DIC message will stop. The Trailer brake system requires a working ABS system in order for it to work., 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 ..., Hydraulic System- Can activate one brake at a time. Usually, it piggybacks off of the ABS. How It Uses These Components. The StabiliTrak control unit uses data from its sensors to apply a specific brake or reduce the engine power to correct the slide and get your Silverado pointed back in the right direction., 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., 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., Feb 21, 2017 · 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 ... , 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., I hooked up my fifth wheel and connected the brakes, hadn't made it out of neighborhood and had all kind of bells going off saying service trailer brakes, service brake system. I checked every easy connection then got under the trucks and disconnected the trailer brake wires at the connection near the spare tire, water poured out of the connection., Thumbs up if you like the video👍🏼 A quick how to on adjusting trailer brakes. This is simple for most DIY folks who wanna do a quick seasonal adjustment. L..., 5. Turn on valve at pressure bleeder and check for leaks where the bleeder head enters the master cylinder reservoir. 6. Start bleeding with the brake at the farthest end of the brake line. If trailer has tandem brake axles, start with the brake at the farthest end of the brake line on the rear axle first. 7., 4,057 Answers. It could be an electrical fault in the wiring, or the trailer plug water or anything else can get in over time and cause a short or false signal, check the plug if fine ( you will need to remove the cover to check wires) then follow the wiring to the cluster plug wiring, if you don't use this then it would be safe to remove the ..., 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..., Let's go over the trailer braking MID display, as well as the controls in greater detail. To access the trailer brake screen, Simply press the left or right buttons on the steering wheel MID controls until is is highlighted. Here, you will see a trailer connection indicator in the upper-right corner. This will light up green when a trailer ..., Now the trailer wants to slow down, but in the process of doing so, it causes the truck to begin "pulling" the trailer again & the brakes on the trailer release. The minute the trailer brakes release, the trailer begins pushing on the decelerating truck again, causing the brakes to apply. This on-off-on-off-on-off pulsing trailer brake ..., Here is a chart showing some trailer brake controller problems and the reasons behind them. Most Seen Problems. Probable Reasons. The trailer brake is incompatible with the brake pedal. 1. Faulty brake wire connection. 2. Mismatched adapter wirings. LED display fails to show trailer connectivity., 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..., 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 free, 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 ..., 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., My truck started randomly lighting up the dash like a Christmas tree - Service ABS/Service Trailer Brake system, and the truck wouldn't **** into 4wd at all. Turns out the solution was a new front drivers' side wheel bearing/hub assembly. Fixed all the issues. Turns out the bearing lets the hub get out of place and messes up the ABS sensor ..., This article applies to the Ford F-150 and F-250 Super Duty (2005-Present). Ford's AdvanceTrac system counteracts oversteering and understeering by reducing power and/or applying brakes to specific wheels. This is done by the use of electronic sensors that communicate with the Powertrain Control Module (PCM) regarding steering performance and stability in adverse weather conditions., Trailer Brake Service message comes up on my 2017 Silverado 1500.I had it in a repair shop today.Checked fuses, tried a new controller mod and a new in dash controller. Problem not solved. Plug into computer to get codes and get a "not connecting" read. I hooked up to a trailer and the trailer brakes did work., If you were to get pulled over and the breakaway system was to be tested you would get in trouble. To simply bypass the system you would just need to cut the wire that goes from the switch to the brake output circuit of your trailer wiring. expert reply by: Jameson C. Reply to Jameson C. Ask The Experts a Question >>., 45 posts · Joined 2018. #1 · Nov 3, 2022. In addition to the High Temp warning light, I get an intermittent Service Trailer Brake System light and no trailer brakes. This happened several times to us in our maiden 2500 mile voyage. I've tried shutting off the truck, plugging the trailer into the bumper 7 pin (it usually plugs into the …, BriGuyGarage. 1.13K subscribers. Subscribed. 1.5K. 136K views 1 year ago. In this video we will be looking at how to repair the very common “service trailer brake system” warning for Chevy..., When the brake pedal is released, springs pull the shoe back into place, releasing the wheel. In turn, the shoe's return rotates the cam back to its original position. In short, air brakes work off of a system of building pressure, moving the air to force the brake mechanics and then releasing the pressure to let off the brakes., Update: Replaced the front brakes; pads and rotors. Front speed sensors looked OK. Still have the Service ABS and Service Trailer Brake warning. Before the warning lights comes on, applying the brakes …, The breakaway system is designed to bring the trailer to a safe stop in the event that the trailer breaks free from the safety chains or the ball mount. They are the ultimate emergency brake. It does this by activating the electric brakes on the trailer. The only catch is, for this to happen you must have fully operational electric brakes.