why are my Toyota Corolla E170 (2013-2019) brake lights always on

Toyota Corolla E170 (2013-2019)

Error Codes

1-2 hours

Time

medium

Difficulty

high

Severity

3 min read

452 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 brake lights that stay on in a 2013-2019 Toyota Corolla E170. Step-by-step guide with diagnostic procedures and repair instructions.

Affected Component

Brakes

Estimated Time

1-2 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Disconnect the battery before working on electrical systems to prevent shock or shorts.

Symptoms

•Brake lights remain lit even when the vehicle is turned off
•Possible draining of the vehicle's battery
•Increased wear on the brake light bulbs
•Brake pedal may feel stuck or not return to its original position
•Potential 'Brake' warning light on the dashboard

Diagnostic Steps

1
Inspect the brake pedal and ensure it returns fully to its resting position.
2
Check the brake light switch located near the brake pedal for proper operation and alignment.
3
Use a multimeter to test the brake light switch for continuity when the pedal is pressed and released.
4
Examine the wiring and connectors associated with the brake light switch for damage or corrosion.
5
Scan the vehicle's onboard diagnostic system for any related error codes.

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
•Screwdriver
•Pliers

Parts Required

•Brake light switch (if faulty)

Related Faults

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Diagnostic Steps

1
Inspect the brake pedal and ensure it returns fully to its resting position.
2
Check the brake light switch located near the brake pedal for proper operation and alignment.
3
Use a multimeter to test the brake light switch for continuity when the pedal is pressed and released.
4
Examine the wiring and connectors associated with the brake light switch for damage or corrosion.
5
Scan the vehicle's onboard diagnostic system for any related error codes.

Solution

1. Preparation

Gather tools: socket set, multimeter, screwdriver, pliers.
Disconnect the vehicle's battery to prevent electrical shorts while working.

2. Inspect and Adjust the Brake Light Switch

Locate the brake light switch mounted on the brake pedal assembly.
Check the adjustment of the switch; it should be positioned such that it is activated when the brake pedal is pressed.
If misaligned, loosen the switch mounting screws and adjust it accordingly, ensuring it activates and deactivates properly with the pedal movement.

3. Replace the Brake Light Switch (if faulty)

If the switch is found to be defective during testing:
1. Remove the switch by disconnecting the electrical connector and unscrewing it from the pedal assembly.
2. Install the new brake light switch, ensuring it is securely fastened and properly aligned.
3. Reconnect the electrical connector.

4. Verify Operation

Reconnect the battery and test the brake lights by pressing the brake pedal.
Ensure that the lights do not remain illuminated when the pedal is released.