how to fix Honda Civic 9th Generation (2012-2015) headlights not working

Honda Civic 9th Generation (2012-2015)

Error Codes

1-3 hours

Time

medium

Difficulty

medium

Severity

3 min read

470 words

Problem Statement

Learn how to diagnose and fix headlights not working in Honda Civic 9th Generation (2012-2015). Step-by-step guide with diagnostic procedures and repair instructions.

Affected Component

Electrical

Estimated Time

1-3 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Disconnect the battery before working on electrical systems.
•Allow the engine to cool before handling any components.

Symptoms

•Headlight bulbs do not illuminate
•High beams may or may not work
•Dashboard warning lights may be illuminated
•Flickering headlights when switched on
•Headlight switch feels loose or unresponsive
•No sound from the headlight relay when activated

Diagnostic Steps

1
Inspect the headlight bulbs for damage or burnout.
2
Check the headlight fuse for continuity and replace if blown.
3
Test the headlight relay operation by swapping with a similar relay.
4
Verify power supply to the headlight connector using a multimeter.
5
Examine the wiring harness for frays, shorts, or corrosion.
6
Inspect the headlight switch for proper function and wear.

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

•OBD-II scanner
•Multimeter
•Socket set
•Fuse puller
•Pliers

Parts Required

•Replacement headlight bulbs
•Replacement fuses
•Replacement relay

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Diagnostic Steps

1
Inspect the headlight bulbs for damage or burnout.
2
Check the headlight fuse for continuity and replace if blown.
3
Test the headlight relay operation by swapping with a similar relay.
4
Verify power supply to the headlight connector using a multimeter.
5
Examine the wiring harness for frays, shorts, or corrosion.
6
Inspect the headlight switch for proper function and wear.

Solution

1. Preparation

Gather tools and parts: OBD-II scanner, multimeter, socket set, replacement headlight bulbs, fuses, and relays as needed.
Ensure the vehicle is parked on a flat surface, and turn off the ignition.

2. Inspect and Replace Headlight Bulbs

Sub-steps:
- Open the hood and locate the headlight assembly.
- Disconnect the electrical connector from the bulb by pressing the tab and pulling it out.
- Remove the bulb from the socket by turning it counterclockwise.
- Install the new bulb by inserting it into the socket and turning it clockwise to secure.
- Reconnect the electrical connector.

3. Check and Replace Headlight Fuse

Sub-steps:
- Locate the fuse box (usually under the dashboard or in the engine bay).
- Identify the headlight fuse (refer to the fuse diagram).
- Use a fuse puller or pliers to remove the fuse and inspect it for continuity.
- Replace with a new fuse of the same amperage if blown.

4. Test and Replace Headlight Relay

Sub-steps:
- Locate the headlight relay in the fuse box.
- Remove the relay and inspect for signs of damage or corrosion.
- Swap the relay with another similar relay to test functionality.
- Replace with a new relay if the headlights work with the swapped relay.

5. Repair Wiring and Connectors

Sub-steps:
- Visually inspect wiring harnesses leading to the headlights for any visible damage.
- Use a multimeter to check for continuity in the wires.
- Repair any damaged wires by splicing in new wire of the same gauge and securing with heat shrink tubing.
- Clean and secure any corroded connectors with electrical contact cleaner.

Tools Required:

OBD-II scanner
Multimeter
Socket set
Fuse puller
Pliers

Parts Required:

Replacement headlight bulbs
Replacement fuses
Replacement relay

Estimated Repair Time: 1-3 hours

Safety Warnings:

Disconnect the battery before working on electrical systems.
Allow the engine to cool before handling any components.