how to fix the brake lights not working on my Toyota Corolla E170 (2013-2019)?

Toyota Corolla E170 (2013-2019)

Error Codes

1-2 hours

Time

medium

Difficulty

critical

Severity

4 min read

617 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 not working on Toyota Corolla E170 (2013-2019). Step-by-step guide with symptoms, diagnostic steps, and repair instructions.

Affected Component

Electrical

Estimated Time

1-2 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Disconnect the negative battery terminal before working on electrical systems.
•Ensure the vehicle is in park or neutral with the parking brake engaged during repairs.

Symptoms

•Brake lights do not illuminate when the brake pedal is pressed
•Warning light for brake system may be illuminated on the dashboard
•Other tail lights functioning normally
•Possible blown fuse for brake lights
•Non-functioning third brake light (if equipped)

Diagnostic Steps

1
Check the brake light bulbs for any signs of damage or burnout.
2
Inspect the brake light fuse in the fuse box for continuity and replace if blown.
3
Test the brake light switch located near the brake pedal for proper operation using a multimeter.
4
Verify the wiring and connections leading to the brake lights for any damage or disconnections.
5
Use an OBD-II scanner to check for any related error codes that may indicate electrical issues.

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

•Screwdriver
•Fuse puller or needle-nose pliers
•Multimeter
•Visual inspection tools

Parts Required

•Brake light bulbs
•Brake light fuse (if blown)
•Brake light switch (if faulty)

Related Faults

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Diagnostic Steps

1
Check the brake light bulbs for any signs of damage or burnout.
2
Inspect the brake light fuse in the fuse box for continuity and replace if blown.
3
Test the brake light switch located near the brake pedal for proper operation using a multimeter.
4
Verify the wiring and connections leading to the brake lights for any damage or disconnections.
5
Use an OBD-II scanner to check for any related error codes that may indicate electrical issues.

Solution

1. Preparation

Gather necessary tools and parts.
Ensure the vehicle is parked on a flat surface and the ignition is off.
Disconnect the negative battery terminal to prevent electrical shock.

2. Replace Brake Light Bulbs

Tools Required: Screwdriver (Phillips or flathead, depending on the bulb type)
Remove the tail light assembly by unscrewing the retaining screws or clips.
Pull the tail light assembly out gently to access the brake light bulbs.
Twist the bulb socket counterclockwise to remove it from the housing.
Replace the burned-out bulb with a new one (consult the owner's manual for bulb specifications).
Reassemble the tail light assembly and secure it with screws.

3. Check and Replace Brake Light Fuse

Tools Required: Fuse puller or needle-nose pliers
Locate the fuse box (usually under the dashboard or in the engine compartment).
Identify the brake light fuse using the diagram on the fuse box cover.
Pull the fuse out and inspect it; if the metal strip is broken, replace it with a new fuse of the same amperage rating.
Reinsert the fuse into its slot securely.

4. Inspect and Test Brake Light Switch

Tools Required: Multimeter
Locate the brake light switch, usually mounted on the brake pedal bracket.
Disconnect the wiring harness from the switch.
Set the multimeter to the continuity setting and test the switch by pressing the brake pedal; it should show continuity when pressed.
If the switch is faulty, replace it with a new one.

5. Verify Wiring and Connections

Tools Required: Visual inspection tools
Inspect the wiring leading to the brake lights for any frays, corrosion, or disconnections.
Repair or replace any damaged wiring as necessary.
Ensure all connections are secure and free of corrosion.