my Toyota Corolla E170 (2013-2019) headlights won't turn on what should I check

Toyota Corolla E170 (2013-2019)

Error Codes

1-2 hours

Time

medium

Difficulty

medium

Severity

3 min read

527 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 avoid shocks.

Symptoms

•Headlights do not illuminate when activated
•Dashboard indicator for headlights may not light up
•High beam function may be unresponsive
•No clicking sound when turning on headlights
•Other electrical components (e.g., interior lights) might still function normally

Diagnostic Steps

1
Inspect the headlight switch for any visible damage or wear.
2
Check the fuse box for blown fuses related to the headlights.
3
Use a multimeter to test the headlight bulbs for continuity.
4
Verify the condition of the wiring harness and connections leading to the headlights.
5
Check the relay for the headlights to ensure it is functioning properly.
6
Perform a scan for any diagnostic trouble codes (DTCs) using 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

•Socket set
•Flathead screwdriver
•Fuse puller or needle-nose pliers
•Multimeter

Parts Required

•Replacement headlight bulbs
•Fuses (as needed)
•Headlight relay (if defective)

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Diagnostic Steps

1
Inspect the headlight switch for any visible damage or wear.
2
Check the fuse box for blown fuses related to the headlights.
3
Use a multimeter to test the headlight bulbs for continuity.
4
Verify the condition of the wiring harness and connections leading to the headlights.
5
Check the relay for the headlights to ensure it is functioning properly.
6
Perform a scan for any diagnostic trouble codes (DTCs) using an OBD-II scanner.

Solution

1. Preparation

Gather necessary tools and parts.
Ensure the vehicle is turned off and parked on a level surface.
Disconnect the battery to prevent electrical shock.

2. Check and Replace Headlight Bulbs

Tools Required: Socket set, flathead screwdriver
Remove the headlight assembly:
1. Open the hood and locate the headlight assembly.
2. Remove any screws or clips securing the assembly.
3. Carefully pull the assembly out.
Inspect the bulbs:
1. Twist the bulb socket counterclockwise to remove it.
2. Check the filament for breaks; replace if necessary.
Install new bulbs:
1. Insert the new bulb into the socket.
2. Twist clockwise to secure it back in place.
Reinstall the headlight assembly:
1. Position the assembly back into place and secure it with screws or clips.

3. Check and Replace Fuses

Tools Required: Fuse puller or needle-nose pliers
Locate the fuse box (usually under the dashboard or in the engine compartment).
Identify the headlight fuse (refer to the fuse box diagram).
Pull the fuse out and inspect it:
1. If the metal strip is broken, replace it with a fuse of the same amperage.
2. Reinsert the fuse and close the fuse box.

4. Testing Relay

Tools Required: Multimeter
Locate the headlight relay in the fuse box.
Use a multimeter to test the relay for continuity:
1. Remove the relay and check for continuity between the terminals.
2. Replace the relay if it is defective.