how to fix the trailer brake controller not working on Ford Explorer Fifth Generation (2011-2019)?

Ford Explorer Fifth Generation (2011-2019)

Error Codes

2-4 hours

Time

medium

Difficulty

high

Severity

3 min read

528 words

⚠️ Safety Warning

This issue requires immediate attention. If you are not experienced with automotive repairs, consult a professional mechanic. Working on critical systems can be dangerous.

Problem Statement

Learn how to diagnose and fix the trailer brake controller not working on 2011-2019 Ford Explorer. Step-by-step guide with diagnostic procedures and repair instructions.

Affected Component

Brakes

Estimated Time

2-4 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Disconnect the battery before working on electrical systems to avoid shock or damage.

Symptoms

•Trailer brake warning light illuminated on the dashboard
•No response from the trailer brakes when engaged
•Inconsistent braking performance while towing
•Check engine light may also be illuminated
•Error codes related to brake system may be stored in the ECU

Diagnostic Steps

1
Inspect the trailer brake controller wiring for any visible damage or loose connections.
2
Use an OBD-II scanner to check for any error codes related to the brake system.
3
Verify the brake controller's fuse in the fuse box; replace if blown.
4
Check the brake controller settings through the vehicle's dashboard settings.
5
Test the brake pedal switch to ensure it is functioning correctly.
6
Inspect the trailer wiring and connections to ensure they are secure and free of corrosion.

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

•Socket set
•Multimeter
•OBD-II scanner
•Wire connectors
•Electrical tape

Parts Required

•Replacement fuse (as needed)
•Wire connectors (if any wiring is damaged)

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Diagnostic Steps

1
Inspect the trailer brake controller wiring for any visible damage or loose connections.
2
Use an OBD-II scanner to check for any error codes related to the brake system.
3
Verify the brake controller's fuse in the fuse box; replace if blown.
4
Check the brake controller settings through the vehicle's dashboard settings.
5
Test the brake pedal switch to ensure it is functioning correctly.
6
Inspect the trailer wiring and connections to ensure they are secure and free of corrosion.

Solution

1. Preparation

Gather necessary tools and parts.
Disconnect the vehicle battery to ensure safety during the repair.
Tools required: Socket set, Multimeter, OBD-II scanner, Wire connectors, Electrical tape.

2. Inspect and Repair Wiring

Sub-steps:
1. Remove the panel under the steering column to access the brake controller wiring.
2. Visually inspect the wiring harness for frayed wires or loose connections.
3. Use a multimeter to test for continuity in the wiring; repair any damaged wires using wire connectors.
4. Secure any loose connections and wrap them with electrical tape to prevent exposure.

3. Replace the Brake Controller Fuse

Sub-steps:
1. Locate the fuse box, typically found under the dashboard on the driver's side.
2. Identify the fuse for the trailer brake controller using the fuse box diagram.
3. Remove the blown fuse and replace it with a new fuse of the same amperage.
4. Reassemble the fuse box cover and reconnect the vehicle battery.

4. Test the Brake Controller

Sub-steps:
1. Reconnect the vehicle battery.
2. Start the engine and use the OBD-II scanner to clear any error codes.
3. Engage the trailer brake controller and check for proper function by applying the brakes with a trailer connected.
4. Adjust the gain on the brake controller as necessary for optimal performance.