why does my Ford F-150 13th Generation (2015-2020) dashboard lights flicker

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

Error Codes

2-4 hours

Time

medium

Difficulty

medium

Severity

3 min read

554 words

Problem Statement

Learn how to diagnose and fix dashboard lights flickering in Ford F-150 2015-2020. Step-by-step guide with diagnostic procedures and repair instructions.

Affected Component

Electrical

Estimated Time

2-4 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Disconnect the battery before working on electrical systems to avoid shocks or shorts.
•Allow the engine to cool before removing any components to prevent burns.

Symptoms

•Dashboard lights flicker intermittently
•Possible dimming of interior lights
•Electrical accessories malfunctioning (e.g., radio, power windows)
•Check engine light or warning lights may illuminate
•Battery warning light may appear

Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to check for any stored diagnostic trouble codes (DTC).
2
Inspect the battery terminals for corrosion or loose connections that may affect power delivery.
3
Check the alternator output with a multimeter to ensure it is charging the battery properly (should be around 13.7 to 14.7 volts with engine running).
4
Inspect the wiring harnesses and connectors for any signs of wear, fraying, or damage.
5
Test the ground connections to verify they are secure and free of corrosion.
6
Examine the fuse box for blown fuses or damaged relays that could affect electrical systems.

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
•Wire brush
•Serpentine belt tool or wrench
•Basic hand tools (socket set, screwdrivers, etc.)

Parts Required

•New alternator (if testing indicates failure)
•Replacement fuses (if any are blown)
•Electrical connectors (if any are damaged)

Related Faults

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Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to check for any stored diagnostic trouble codes (DTC).
2
Inspect the battery terminals for corrosion or loose connections that may affect power delivery.
3
Check the alternator output with a multimeter to ensure it is charging the battery properly (should be around 13.7 to 14.7 volts with engine running).
4
Inspect the wiring harnesses and connectors for any signs of wear, fraying, or damage.
5
Test the ground connections to verify they are secure and free of corrosion.
6
Examine the fuse box for blown fuses or damaged relays that could affect electrical systems.

Solution

1. Preparation

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

2. Clean Battery Terminals

Remove the battery cables, starting with the negative terminal followed by the positive terminal.
Clean the terminals and battery posts using a wire brush and a mixture of baking soda and water to neutralize any corrosion.
Reconnect the battery cables securely, ensuring they are tight.

3. Test and Replace Alternator (if needed)

Use a multimeter to confirm alternator output. If it’s below 13.7 volts, further testing is needed.
Remove the serpentine belt by loosening the tensioner pulley and removing the belt from the alternator.
Disconnect the wiring harness from the alternator and remove the mounting bolts.
Install the new alternator by reversing the removal process, ensuring all connections are secure.
Reinstall the serpentine belt and check for proper tension.

4. Inspect and Repair Wiring

Visually inspect all wiring harnesses for damage; repair or replace any damaged sections.
Check ground connections; clean and tighten if necessary to establish a good ground circuit.

5. Verify Fuse and Relay Functionality

Open the fuse box and inspect for any blown fuses; replace any faulty fuses with the appropriate amperage rating.
Test any relays related to the dashboard lights and replace them if they are not functioning.