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How can I troubleshoot a malfunctioning trailer brake controller in my 2019 Chevrolet Silverado 1500... - Chevrolet Silverado 1500
Home/Cars/Chevrolet/Silverado 1500/T1XX (2019-2023)/How can I troubleshoot a malfunctioning trailer brake controller in my 2019 Chevrolet Silverado 1500...

How can I troubleshoot a malfunctioning trailer brake controller in my 2019 Chevrolet Silverado 1500...

Chevrolet Silverado 1500 T1XX (2019-2023)

Error Codes
2-4 hours
Time
medium
Difficulty
medium
Severity
Navigation
ProblemSymptomsDiagnosisSolution
ProblemSymptomsDiagnosisSolution
3 min read
555 words

Problem Statement

Learn how to troubleshoot and repair a malfunctioning trailer brake controller in your 2019 Chevrolet Silverado 1500 T1XX with detailed steps and required tools.

Affected Component
trailer brake controller
Estimated Time
2-4 hours

Symptoms

  • •Trailer brakes do not engage when the brake pedal is pressed.
  • •Warning lights on the dashboard related to trailer brakes.
  • •Inconsistent braking or excessive braking force.
  • •The trailer brake controller display shows error messages or is unresponsive.

Diagnostic Steps

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Solution

💡 Expert Tip

For complex repairs like this, consider taking photos at each step. This helps if you need to reverse a step or consult with a mechanic. Also, keep all removed parts organized - you may need to reference them during reassembly.

Verification

After completing the repair, verify that the issue has been resolved:

  • ✓Test the affected component to ensure it functions correctly
  • ✓Check for any error codes or warning lights
  • ✓Monitor the vehicle for a few days to ensure the issue does not recur

Prevention Tips

To prevent this issue from occurring again:

  • •Follow the manufacturer's recommended maintenance schedule
  • •Address warning signs early before they develop into major issues
  • •Use quality parts and fluids recommended for your vehicle
  • •Keep detailed records of all repairs and maintenance

Tools & Equipment Required

  • •OBD-II Scanner
  • •Multimeter
  • •Test Light
  • •Wire Strippers
  • •Soldering Iron
  • •Electrical Tape
  • •Socket Set
  • •Screwdriver Set

Additional Information

Affected Component
trailer brake controller
Estimated Time
2-4 hours
Difficulty
medium
Severity
medium
Tools Required
8 items

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Troubleshooting a Malfunctioning Trailer Brake Controller in a 2019 Chevrolet Silverado 1500 T1XX

Symptoms of a Malfunctioning Trailer Brake Controller:

  1. Trailer brakes do not engage when the brake pedal is pressed.
  2. Warning lights on the dashboard related to trailer brakes.
  3. Inconsistent braking or excessive braking force.
  4. The trailer brake controller display shows error messages or is unresponsive.

Step 1: Visual Inspection

  • Tools Required: None
  1. Inspect the trailer brake controller unit for physical damage or loose connections.
  2. Check the wiring harness connections to the brake controller and ensure they are secure and free from corrosion.
  3. Look for any frayed or damaged wires leading to the trailer plug.

Step 2: Check for Diagnostic Trouble Codes (DTCs)

  • Tools Required: OBD-II Scanner
  1. Connect the OBD-II scanner to the vehicle's diagnostic port located under the dashboard.
  2. Read any stored DTCs related to the trailer brake controller. Common codes could include:
    • C0710: Brake Control Module
    • C0715: Brake Control Module Power Supply
    • C0720: Trailer Brake Control Circuit
  3. Record any codes for reference.

Step 3: Test Trailer Brake Operation

  • Tools Required: Multimeter, Test Light

  1. Brake Pedal Test:

    • With the trailer connected, press the brake pedal and observe if the trailer brakes engage.
    • If they do not engage, proceed to check the controller settings.

  2. Voltage Check:

    • Use a multimeter to check the output voltage from the brake controller when the brake pedal is pressed.
    • Expected voltage should be 12V or more depending on the controller settings.
    • If no voltage is present, further investigate the controller or wiring.
Repair Instructions

Step 4: Reset Trailer Brake Controller

  • Tools Required: None
  1. Turn the ignition off and disconnect the vehicle battery for about 10 minutes.
  2. Reconnect the battery and turn the ignition back on.
  3. Check if the trailer brake controller resets and operates normally.

Step 5: Inspect and Repair Wiring

  • Tools Required: Wire Strippers, Soldering Iron, Electrical Tape, Multimeter
  1. If any wiring issues were found during the visual inspection, repair or replace damaged wires.
  2. Ensure all connectors are clean and securely fastened.
  3. After repairs, recheck the voltage output from the brake controller.

Step 6: Replace the Trailer Brake Controller (if necessary)

  • Tools Required: Socket Set, Screwdriver Set
  1. If the trailer brake controller is still malfunctioning after all checks and repairs:
    • Disconnect the vehicle battery.
    • Remove the mounting screws from the brake controller.
    • Disconnect the wiring harness from the back of the controller.
    • Install the new brake controller by connecting the wiring harness and securing it with screws.
    • Reconnect the battery.
    • Test the new controller by pressing the brake pedal and verifying that the trailer brakes engage.
Final Check
  1. After replacing or repairing, perform a final test by connecting the trailer and checking the brake operation under load.
  2. Ensure that any DTCs are cleared using the OBD-II scanner and verify that no new codes appear after testing.
Conclusion

By following these detailed steps, you should be able to effectively troubleshoot and resolve issues with the trailer brake controller in your 2019 Chevrolet Silverado 1500 T1XX. If problems persist, consider seeking assistance from a professional technician.