What causes the parking brake warning light to stay on in a 2020 Ford Explorer?

Ford Explorer Sixth Generation (2020-present)

Error Codes

medium

Difficulty

medium

Severity

4 min read

687 words

Problem Statement

Learn about the causes, symptoms, and diagnostic steps for the parking brake warning light staying on in a 2020 Ford Explorer.

Affected Component

brake system

Symptoms

•Parking brake warning light illuminated on the dashboard
•Difficulty releasing the parking brake
•Soft or spongy brake pedal feel
•Reduced braking performance
•Low brake fluid level indicator (if equipped)

Diagnostic Steps

1
Visual Inspection: Check if the parking brake is fully disengaged
2
Check Brake Fluid Level: Inspect the brake fluid reservoir
3
Inspect Brake System Components: Look for visible leaks or damage
4
Test the Brake Switch: Check for continuity with the brake disengaged
5
Check Electrical Connections: Inspect wiring harness and connectors
6
Scan for Diagnostic Trouble Codes (DTCs): Use an OBD-II scanner

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

•Basic Hand Tools: Screwdrivers, wrenches, pliers
•Multimeter: For testing the brake switch
•OBD-II Scanner: To read diagnostic trouble codes
•Brake Fluid: In case a refill is necessary
•Shop Manual: For specific wiring diagrams and component locations

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Diagnostic Steps

1
Visual Inspection: Check if the parking brake is fully disengaged
2
Check Brake Fluid Level: Inspect the brake fluid reservoir
3
Inspect Brake System Components: Look for visible leaks or damage
4
Test the Brake Switch: Check for continuity with the brake disengaged
5
Check Electrical Connections: Inspect wiring harness and connectors
6
Scan for Diagnostic Trouble Codes (DTCs): Use an OBD-II scanner

Solution

Causes of the Parking Brake Warning Light Staying On in a 2020 Ford Explorer

The parking brake warning light on a 2020 Ford Explorer can illuminate for several reasons. Below are the common causes:

Engaged Parking Brake: The most straightforward reason is that the parking brake is still engaged.
Low Brake Fluid Level: The warning light may also activate if the brake fluid is low, as this can indicate a potential issue with the braking system.
Faulty Brake Switch: The switch that detects whether the parking brake is engaged may be malfunctioning.
Brake System Issues: Problems with the overall brake system, including leaks or worn components, can also trigger the warning light.
Electrical Issues: Faulty wiring or blown fuses related to the brake system can cause the warning light to stay on.

Tools Required

Basic Hand Tools: Screwdrivers, wrenches, pliers.
Multimeter: For testing the brake switch.
OBD-II Scanner: To read diagnostic trouble codes.
Brake Fluid: In case a refill is necessary.
Shop Manual: For specific wiring diagrams and component locations.

Repair Instructions

Step 1: Release the Parking Brake

If the parking brake is engaged, pull the lever up slightly and press the release button, then lower it fully to disengage.

Step 2: Check and Top Off Brake Fluid

Open the hood and locate the brake fluid reservoir.
Inspect the fluid level. If it is low, add the appropriate brake fluid (check your owner’s manual for the proper type).
Close the reservoir cap and check if the warning light turns off.

Step 3: Inspect Brake System Components

Visually inspect brake lines, calipers, and the master cylinder for leaks or damage.
If any leaks are found, replace the damaged components and top off the brake fluid.

Step 4: Test the Brake Switch

Disconnect the electrical connector from the parking brake switch.
Set the multimeter to continuity mode.
With the parking brake disengaged, test the switch terminals. A continuous beep indicates a functioning switch; if not, replace the switch.

Step 5: Check Electrical Connections

Inspect the wiring harness connected to the parking brake switch and brake light system.
Look for corroded connectors or damaged wires.
Repair or replace any faulty wiring.

Step 6: Scan for DTCs

Connect the OBD-II scanner to the vehicle’s diagnostic port.
Turn on the ignition but do not start the engine.
Scan for any DTCs related to the brake system. Make repairs based on the codes retrieved.

Step 7: Test Drive

After making necessary repairs, take the vehicle for a test drive.
Monitor the dashboard to ensure the parking brake warning light is no longer illuminated.

Conclusion

If after following these steps the parking brake warning light remains on, there may be a more complex issue with the brake system that requires professional diagnosis. Always consult with a qualified technician if you are unsure about any repairs.