How To Reset Service Trailer Brake System With This Easy DIY

To slow the motion, the trailer brake is the most important component indeed. When it can’t access or has some internal issue, you’ll immediately see the message on the dashboard ‘Service Trailer Brake System’. 

This message will irritate you by popping up every time your switch on the truck. Resting the fault code will help you get rid of this message. 

So, how to reset Service Trailer Brake System? To do that, find the rear-side adjusting nut of the trailer brakes (close to the axle). Then, take a flat screwdriver to unbolt the locknut. After that, twist it from right to left side. 

Let’s get into the whole procedure in detail below!

Here’s How To Reset Service Trailer Brake System!

No matter if it’s about Silverado, Chevy, or GMC Service Trailer Brake System, the message is easy to reset if you play with the interior parts just a little bit. Without wasting time, I’ll share the steps below. 

Step 1: Buy The Tools & Parts.

You’ll need a few gears in order to start the reset procedure. If you have these at your home, then straightly move to the next step. Here’s the list – 

  • Flat Head Screwdriver.  
  • Truck Jack 

Step 2: Jack The Back Of Tire.

Take the jack lifter and place it on the rear side of the truck wheel. You can skip this step if you are comfortable working by bending your neck. 

Step 3: Find The Adjusting Nut Of The Trailer Brakes.

Grab the user manual of your specific truck model to understand the location of the trailer brake. Then, go to the backside of your truck and take out the right wheel to reach the part. This plays a huge role in the Service Trailer Brake System reset.

Now, look closely at the star wheel to locate the adjusting nut on the rear side of the trailer brake. It basically sits close to the axle. After finding this part, move to the next step.

Step 4: Unbolt The locknut Using A Flat Screwdriver.

Take the flat screwdriver which you have organized on the table. Gently use pressure and twist the locknut that holds the adjusting nut. In this step, you can use penetrating oil to moisten the nut if it looks rusty or cleans it using a cloth.

Step 5: Twist The Adjusting Nut Clockwise For Reset.

Place the locknut in a secure place. Next, use the screwdriver to twist the adjusting nut from right to left side aka clockwise motion. 

When doing so, it sits right against the backing plate. Ensure the adjusting nut is not too tight or loose as it’ll cause a big hassle. 

Step 6: Attach Every Part Back To Their Places.

Insert the locknut inside the adjusting nut using the same screwdriver. Then, attach the wheel back to its place. Done!

Frequently Asked Questions

1. What does service trailer brake system mean?

It’s basically a fault code that pops on the truck dashboard (on those models that contain ITBC aka Integrated Trailer Brake Controller). This literally means a big issue with the trailer brake module or wiring can’t receive the signal and power to work the trailer brakes.

2. How do you test a trailer brake connection?

To do that, you have to locate the brake magnet wire and use the negative lead of the multimeter.

Next, put the positive lead of the multimeter into the battery. Read the multimeter to see any info about amperage shifting. If you see, then it means internal short. 

3. How are trailer brakes activated?

You can simply activate the trailer brakes by plugging the cable inside the trailer into the truck. It has a switch that requires the trigger to get the slow movement of the trailer after activating the trailer brakes.

Wrapping Up

Now, seeing the message ‘Service Trailer Brake’ won’t terrify you. In case, the simple reset doesn’t fix the issue you are facing and shows the same message, I would suggest you change the trailer brake module.

Plus, replace the fuses and repair the wiring areas as these can fix the trouble. Hope this guide about how to reset Service Trailer Brake System is informative and descriptive to you to follow the steps. Catch You In Next Guide!

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