how to fix Honda Civic 9th Generation (2012-2015) headlights that won't turn on?

Honda Civic 9th Generation (2012-2015)

Error Codes

1-2 hours

Time

medium

Difficulty

medium

Severity

3 min read

577 words

Problem Statement

Learn how to diagnose and fix headlights not turning on in Honda Civic 9th Generation (2012-2015). Step-by-step guide with tools and tips.

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 shorts.
•Allow the engine to cool before inspecting or working on electrical components.

Symptoms

•Headlights do not illuminate when switched on
•Dashboard indicator for headlights is off
•High beams may or may not function
•Fog lights may be operational (if equipped)
•Clicking sound when switching headlights on (indicates relay issue)
•Electrical components (like turn signals) may function intermittently

Diagnostic Steps

1
Inspect the headlight bulbs for any signs of burn-out or damage.
2
Check the headlight fuses in the fuse box for continuity using a multimeter.
3
Test the headlight switch for proper operation using a multimeter.
4
Verify the headlight relay function by swapping it with a similar relay in the fuse box.
5
Inspect wiring and connectors for corrosion, damage, or loose connections.
6
Use an OBD-II scanner to check for any fault codes related to the lighting system.

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
•Multimeter
•Replacement bulbs
•New fuse
•Fuse puller
•Pliers

Parts Required

•Replacement headlight bulbs
•Headlight fuse (if blown)
•Headlight relay (if faulty)

Related Faults

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Symptoms

•Headlights do not illuminate when switched on

•Dashboard indicator for headlights is off

•High beams may or may not function

•Fog lights may be operational (if equipped)

•Clicking sound when switching headlights on (indicates relay issue)

•Electrical components (like turn signals) may function intermittently

Diagnostic Steps

1
Inspect the headlight bulbs for any signs of burn-out or damage.
2
Check the headlight fuses in the fuse box for continuity using a multimeter.
3
Test the headlight switch for proper operation using a multimeter.
4
Verify the headlight relay function by swapping it with a similar relay in the fuse box.
5
Inspect wiring and connectors for corrosion, damage, or loose connections.
6
Use an OBD-II scanner to check for any fault codes related to the lighting system.

Solution

1. Preparation

Gather tools: socket set, multimeter, replacement bulbs, and a new fuse if needed.
Ensure the vehicle is parked on a flat surface, and the engine is off.

2. Inspect and Replace Headlight Bulbs

Sub-steps:
- Open the hood and locate the headlight assembly.
- Remove the bulb access cover (if equipped).
- Disconnect the power connector from the headlight bulb.
- Remove the old bulb by turning it counterclockwise and pulling it out.
- Insert the new bulb, ensuring not to touch the glass with bare hands.
- Reconnect the power connector and replace the access cover.

3. Check and Replace Fuses

Sub-steps:
- Locate the fuse box (typically found under the dashboard or in the engine compartment).
- Identify the headlight fuse (refer to the fuse box diagram).
- Remove the fuse using a fuse puller or pliers.
- Inspect the fuse for a broken filament; replace with a new fuse of the same amperage if necessary.

4. Test and Replace Relay

Sub-steps:
- Locate the headlight relay in the fuse box.
- Remove the relay by pulling it straight out.
- Swap it with a similar relay (e.g., horn relay) to test functionality.
- If headlights work with swapped relay, replace the faulty relay.

5. Inspect Wiring and Connections

Sub-steps:
- Visually inspect the wiring harness connected to the headlights for any signs of wear, fraying, or corrosion.
- Clean any corroded connections with electrical contact cleaner.
- Repair or replace damaged wiring as necessary.