how to fix my Toyota Corolla E170 (2013-2019) headlights not turning on?

Toyota Corolla E170 (2013-2019)

Error Codes

1-2 hours

Time

medium

Difficulty

medium

Severity

3 min read

517 words

Problem Statement

Learn how to diagnose and fix headlights not turning on in Toyota Corolla E170 (2013-2019). Step-by-step guide with diagnostic procedures and repair instructions.

Affected Component

Electrical

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 short circuits.

Symptoms

•Headlights do not illuminate when switched on
•Dashboard warning light for headlights is illuminated (if applicable)
•No flickering or intermittent operation of headlights
•No sound from headlight relay when switched on
•Other exterior lights may work (e.g., turn signals, brake lights)

Diagnostic Steps

1
Check the headlight switch for proper operation.
2
Inspect fuses related to the headlight circuit using the fuse box diagram.
3
Use an OBD-II scanner to check for any related error codes.
4
Test the headlight relay for functionality by swapping it with a similar relay.
5
Measure voltage at the headlight connectors using a multimeter when the switch is activated.
6
Inspect the wiring for any visible damage or 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

•Multimeter
•Fuse puller
•Socket set
•Flathead screwdriver

Parts Required

•Headlight fuse (if blown)
•Headlight relay (if faulty)

Related Faults

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Diagnostic Steps

1
Check the headlight switch for proper operation.
2
Inspect fuses related to the headlight circuit using the fuse box diagram.
3
Use an OBD-II scanner to check for any related error codes.
4
Test the headlight relay for functionality by swapping it with a similar relay.
5
Measure voltage at the headlight connectors using a multimeter when the switch is activated.
6
Inspect the wiring for any visible damage or corrosion.

Solution

1. Preparation

Gather tools: Multimeter, fuse puller, socket set, and flathead screwdriver.
Ensure the vehicle is parked on a level surface and the engine is off.
Disconnect the negative battery terminal to prevent electrical shorts.

2. Check and Replace Fuses

Locate the fuse box (typically under the dashboard or in the engine compartment).
Refer to the fuse diagram to find the headlight fuse.
Use a fuse puller to carefully remove the headlight fuse.
Inspect the fuse for continuity; replace it if blown with a new fuse of the same amperage.

3. Test and Replace Headlight Relay

Locate the headlight relay in the fuse box.
Swap the headlight relay with a similar relay (e.g., horn relay) to test functionality.
If the headlights work with the swapped relay, replace the faulty relay with a new one.

4. Inspect and Repair Wiring

Visually inspect the wiring harness leading to the headlight connectors for any signs of wear, fraying, or corrosion.
If any damage is found, repair the wiring using electrical tape or replace the damaged section of the harness.
Ensure all connections are secure and free from corrosion.

5. Reconnect Battery and Test

Reconnect the negative battery terminal.
Turn on the headlights to check if they function properly.