my Ford F-150 13th Generation (2015-2020) headlights won't turn on what to check

Ford F-150 13th Generation (2015-2020)

Error Codes

1-2 hours

Time

medium

Difficulty

high

Severity

3 min read

493 words

⚠️ Safety Warning

This issue requires immediate attention. If you are not experienced with automotive repairs, consult a professional mechanic. Working on critical systems can be dangerous.

Problem Statement

Learn how to diagnose and fix headlights not working on Ford F-150 (2015-2020). 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.
•Allow the headlights to cool before handling bulbs to avoid burns.

Symptoms

•Headlights completely non-functional
•Dashboard indicator for headlights not illuminated
•No response when headlight switch is turned on
•Fog lights may still function (if applicable)
•High beams may or may not work

Diagnostic Steps

1
Check the headlight switch for proper operation and ensure it’s in the correct position.
2
Inspect the fuse related to the headlights in the fuse box for any signs of a blown fuse.
3
Use a multimeter to test for voltage at the headlight connectors.
4
Examine the headlight bulbs for any signs of damage or filament breakage.
5
Check the wiring harness for any frayed wires or loose connections.
6
Scan for any error codes using an OBD-II scanner that may indicate electrical issues.

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 or needle-nose pliers
•Flathead screwdriver

Parts Required

•Replacement headlight bulbs
•Replacement fuses

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Diagnostic Steps

1
Check the headlight switch for proper operation and ensure it’s in the correct position.
2
Inspect the fuse related to the headlights in the fuse box for any signs of a blown fuse.
3
Use a multimeter to test for voltage at the headlight connectors.
4
Examine the headlight bulbs for any signs of damage or filament breakage.
5
Check the wiring harness for any frayed wires or loose connections.
6
Scan for any error codes using an OBD-II scanner that may indicate electrical issues.

Solution

1. Preparation

Gather tools and parts required for the repair.
Disconnect the negative battery terminal to ensure safety while working.

2. Check and Replace Fuses

Tools Required: Fuse puller or needle-nose pliers
Locate the fuse box, usually found under the dashboard or in the engine compartment.
Check the headlight fuse (refer to the owner's manual for location).
If the fuse is blown, replace it with a new fuse of the same amperage.

3. Inspect and Replace Headlight Bulbs

Tools Required: Flathead screwdriver (if applicable for cover removal)
Remove the headlight assembly by unscrewing any retaining screws or clips.
Disconnect the wiring harness from the headlight bulb.
Inspect the bulb for any signs of damage; if the filament is broken or the glass is darkened, replace with a new bulb.
Install the new bulb and reassemble the headlight assembly.

4. Check Wiring and Connections

Visually inspect the wiring harness connected to the headlight for any signs of wear, fraying, or loose connections.
If any damage is found, repair or replace the wiring as necessary. Ensure all connections are secure.

5. Test Headlights

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