how to fix the headlights not working on my Ford F-150 13th Generation (2015-2020)

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

Error Codes

1-2 hours

Time

medium

Difficulty

high

Severity

3 min read

575 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 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 components to prevent shock.
•Allow vehicle components to cool before inspection or handling.

Symptoms

•Headlights do not illuminate when switched on
•High beams may not function
•Dashboard indicator for headlights may be off
•Flickering headlights when in use
•Dim or inconsistent light output from headlights

Diagnostic Steps

1
Inspect the headlight bulbs for physical damage or burnt filaments.
2
Check the headlight fuse in the fuse box for any signs of being blown.
3
Use a multimeter to test the voltage at the headlight connector for proper electrical supply.
4
Examine the headlight switch for functionality.
5
Inspect wiring and connectors for corrosion or loose connections.
6
Verify the operation of the body control module (BCM) if applicable.

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

•Flathead screwdriver
•Socket set
•Fuse puller or needle-nose pliers
•Multimeter
•Wire brush
•Electrical cleaner

Parts Required

•Headlight bulbs (specific to F-150 model)
•Headlight fuse (if blown)
•Headlight switch (if faulty)

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Diagnostic Steps

1
Inspect the headlight bulbs for physical damage or burnt filaments.
2
Check the headlight fuse in the fuse box for any signs of being blown.
3
Use a multimeter to test the voltage at the headlight connector for proper electrical supply.
4
Examine the headlight switch for functionality.
5
Inspect wiring and connectors for corrosion or loose connections.
6
Verify the operation of the body control module (BCM) if applicable.

Solution

1. Preparation

Gather all necessary tools and parts.
Ensure the vehicle is parked on a level surface with the engine off.
Disconnect the negative battery terminal to prevent electrical shock.

2. Bulb Replacement

Tools Required: Flathead screwdriver, socket set.
Sub-steps:
1. Remove the headlight assembly by unscrewing any retaining screws or clips.
2. Disconnect the electrical connector from the back of the headlight bulb.
3. Remove the old headlight bulb by twisting it counterclockwise.
4. Insert the new bulb (ensure it is the correct type) by twisting it clockwise until secure.
5. Reconnect the electrical connector and reinstall the headlight assembly.

3. Fuse Inspection and Replacement

Tools Required: Fuse puller or needle-nose pliers.
Sub-steps:
1. Locate the fuse box, usually found under the dashboard or in the engine compartment.
2. Identify the headlight fuse using the diagram on the fuse box cover.
3. Pull the fuse and inspect it; if the filament is broken, replace it with a new fuse of the same amperage.
4. Reinsert the fuse and close the fuse box.

4. Wiring Inspection

Tools Required: Multimeter, wire brush, electrical cleaner.
Sub-steps:
1. Examine the wiring harness connected to the headlights for any signs of damage or corrosion.
2. Clean any corroded connections with a wire brush and electrical cleaner.
3. Secure any loose connections and ensure wiring is intact.

5. Testing Headlight Switch and BCM

Tools Required: Multimeter.
Sub-steps:
1. Test the headlight switch by checking for continuity when toggled.
2. If the switch is faulty, replace it with a new one.
3. For BCM issues, consult a professional or use a diagnostic tool to scan for trouble codes.