how to fix a tail light that won't work in Toyota Corolla E170 (2013-2019)

Toyota Corolla E170 (2013-2019)

Error Codes

1-2 hours

Time

medium

Difficulty

medium

Severity

3 min read

523 words

Problem Statement

Learn how to diagnose and fix a non-working tail light in a 2013-2019 Toyota Corolla E170. Step-by-step guide with tools and parts required.

Affected Component

Electrical

Estimated Time

1-2 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Disconnect battery before working on electrical systems to prevent shock or short circuits.

Symptoms

•Tail light not illuminating when headlights are on
•Brake light may also be non-functional
•Check engine light may illuminate if associated with a fault in the lighting system
•No sound when the turn signal is activated (if related)
•Visual inspection reveals the bulb is not lit

Diagnostic Steps

1
Inspect the tail light bulb for physical damage or burning.
2
Use a multimeter to test the voltage at the tail light socket.
3
Check the fuse related to the tail light circuit in the fuse box.
4
Inspect wiring harness and connectors for corrosion or damage.
5
Test the tail light switch for proper function.
6
Verify that the vehicle's battery is fully charged.

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

•Multimeter
•Screwdriver set
•Fuse puller
•Electrical contact cleaner

Parts Required

•Replacement tail light bulb (7443)
•Replacement fuse (if applicable)

Related Faults

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Diagnostic Steps

1
Inspect the tail light bulb for physical damage or burning.
2
Use a multimeter to test the voltage at the tail light socket.
3
Check the fuse related to the tail light circuit in the fuse box.
4
Inspect wiring harness and connectors for corrosion or damage.
5
Test the tail light switch for proper function.
6
Verify that the vehicle's battery is fully charged.

Solution

1. Preparation

Gather tools and parts: ensure you have a replacement bulb, multimeter, and necessary hand tools.
Disconnect the negative battery cable to prevent electrical shock.

2. Inspect and Replace Bulb

Remove the tail light assembly by unscrewing the retaining screws.
Gently pull the tail light assembly out of the vehicle.
Twist the bulb socket counterclockwise to remove it from the assembly.
Replace the old bulb with a new one of the same type (typically a 7443 bulb).
Reinstall the bulb socket into the tail light assembly and twist clockwise to secure.

3. Check and Replace Fuse

Locate the fuse box, typically found under the dashboard or in the engine compartment.
Identify the fuse related to the tail lights (refer to the fuse box diagram).
Use a fuse puller to remove the fuse and inspect it for continuity.
If blown, replace it with a new fuse of the same amperage.

4. Inspect Wiring and Connectors

Examine the wiring leading to the tail light assembly for signs of wear or damage.
Disconnect the wiring harness and check for corrosion or loose connections.
Clean connectors with electrical contact cleaner and reattach securely.

5. Test Tail Light Switch

Using a multimeter, test the tail light switch for continuity when the switch is in the 'on' position.
If faulty, replace the tail light switch by removing the steering column cover and unscrewing the switch.