how to fix the dimming headlights on my Ford Explorer Sixth Generation (2020-present)

Ford Explorer Sixth Generation (2020-present)

Error Codes

2-4 hours

Time

medium

Difficulty

medium

Severity

3 min read

596 words

Problem Statement

Learn how to diagnose and fix dimming headlights on your 2020-present Ford Explorer. Step-by-step guide with symptoms, diagnostic steps, and solutions.

Affected Component

Electrical

Estimated Time

2-4 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

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

Symptoms

•Headlights dimming intermittently or consistently while driving
•Flickering or pulsating of headlights
•Dashboard lights dimming in conjunction with headlights
•Difficulty starting the engine
•Battery warning light illuminated on the dashboard

Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to check for any related codes.
2
Inspect the battery visually for corrosion or loose connections.
3
Test the battery voltage with a multimeter to ensure it is within the normal range (12.4 - 12.7 volts for a fully charged battery).
4
Check the alternator output while the engine is running, looking for a voltage reading between 13.5 and 14.5 volts.
5
Inspect the headlight connections and wiring for any signs of wear, damage, or corrosion.
6
Measure the voltage at the headlight connector to ensure it is adequate.

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
•Wire brush
•Serpentine belt tool
•Soldering iron
•Crimp connectors

Parts Required

•New battery
•New alternator
•Electrical connectors

Related Faults

Share this solution

Comments

No comments yet

Be the first to share your thoughts

Back to Generation

Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to check for any related codes.
2
Inspect the battery visually for corrosion or loose connections.
3
Test the battery voltage with a multimeter to ensure it is within the normal range (12.4 - 12.7 volts for a fully charged battery).
4
Check the alternator output while the engine is running, looking for a voltage reading between 13.5 and 14.5 volts.
5
Inspect the headlight connections and wiring for any signs of wear, damage, or corrosion.
6
Measure the voltage at the headlight connector to ensure it is adequate.

Solution

1. Preparation

Gather necessary tools and parts.
Disconnect the battery to ensure safety while working on electrical components.

2. Battery Inspection and Replacement

Check Battery Condition
- Use a multimeter to measure voltage; replace the battery if below 12.4 volts.
- Clean the terminals with a wire brush and apply a protective spray if corroded.
Replace Battery (if needed)
- Remove the old battery by disconnecting the negative terminal first, followed by the positive terminal.
- Install the new battery, connecting the positive terminal first, then the negative terminal.
- Ensure the battery is secured in place.

3. Alternator Inspection and Replacement

Check Alternator Function
- Start the engine and measure the voltage at the battery with the engine running.
- If below 13.5 volts, the alternator may be faulty.
Replace Alternator (if needed)
- Disconnect the battery again.
- Remove the serpentine belt from the alternator pulley.
- Unbolt the alternator from its mounting and disconnect the electrical connectors.
- Install the new alternator by reversing the removal steps and reattach the serpentine belt.
- Reconnect the battery.

4. Wiring and Connection Repair

Inspect and Repair Wiring
- Examine the wiring from the battery to the alternator and headlights for damage.
- Repair any damaged wires by stripping the insulation and soldering new wire or using butt connectors.
Secure Connections
- Ensure all connections are tight and free from corrosion.