how to fix my Tesla Outback headlight that keeps going out

Subaru Outback 5th Generation (2015-2019)

Error Codes

1-2 hours

Time

medium

Difficulty

medium

Severity

3 min read

492 words

Problem Statement

Learn how to diagnose and fix headlight issues in Tesla Outback. Step-by-step guide with symptoms, diagnostic steps, 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.
•Allow the engine to cool before beginning work on any components.

Symptoms

•Headlight turns off while driving
•Headlight flickers before going out
•Dashboard warning light for headlight failure illuminated
•Difficulty seeing at night due to inconsistent headlight operation
•Increased reliance on high beams due to headlight failure

Diagnostic Steps

1
Inspect the headlight bulb for physical damage or burnout.
2
Check the headlight socket for corrosion or loose connections.
3
Use a multimeter to test for voltage at the headlight terminals.
4
Examine the wiring harness for frayed or damaged wires.
5
Scan the vehicle for error codes using an OBD-II scanner to check for electrical issues.
6
Check the headlight relay for proper operation.

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
•Socket set
•Wire brush
•Electrical contact cleaner

Parts Required

•Headlight bulb (specific to Tesla Outback)
•Headlight relay (if needed)

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Diagnostic Steps

1
Inspect the headlight bulb for physical damage or burnout.
2
Check the headlight socket for corrosion or loose connections.
3
Use a multimeter to test for voltage at the headlight terminals.
4
Examine the wiring harness for frayed or damaged wires.
5
Scan the vehicle for error codes using an OBD-II scanner to check for electrical issues.
6
Check the headlight relay for proper operation.

Solution

1. Preparation

Gather necessary tools and parts.
Ensure the vehicle is parked on a level surface and the engine is turned off.
Disconnect the vehicle's battery (negative terminal) to avoid electrical shock.

2. Replace Headlight Bulb

Tools Required: Socket set, gloves, headlight bulb replacement.
Remove the headlight assembly cover by unscrewing the retaining screws.
Disconnect the wiring harness from the back of the headlight bulb.
Twist the old bulb counterclockwise to remove it from the socket.
Insert the new bulb into the socket and twist it clockwise to secure.
Reconnect the wiring harness and replace the headlight assembly cover.

3. Inspect and Clean Socket

Tools Required: Wire brush, electrical contact cleaner.
Remove the headlight bulb again to access the socket.
Inspect the socket for corrosion or damage; clean using a wire brush and electrical contact cleaner.
Ensure the socket connections are tight and secure.

4. Test Wiring and Relay

Tools Required: Multimeter.
Use the multimeter to check for continuity in the wiring harness leading to the headlight.
If any wires are damaged, splice in new wire of the same gauge and insulate the connections.
Test the headlight relay by switching it with another relay of the same type; if the headlight works with the different relay, replace the faulty relay.