how to diagnose Ford F-150 13th Generation (2015-2020) electrical problems

Solution

1. Preparation

• Gather all necessary tools and equipment.
• Disconnect the negative battery terminal to ensure safety while working on electrical components.

2. Battery Inspection

• Remove the battery from the vehicle if corrosion is present.
• Clean the battery terminals and cable connections using a wire brush.
• Perform a load test on the battery using a battery tester to check for capacity.

3. Fuse Box Examination

• Remove the fuse box cover and inspect each fuse for continuity.
• Replace any blown fuses with new ones of the same amperage.
• Document any repeated fuse failures for further investigation.

4. Alternator Testing

• Reconnect the battery and start the engine.
• Use a multimeter to measure the voltage at the battery terminals; it should read between 13.8 to 14.4 volts.
• If the voltage is outside this range, replace the alternator.

5. Wiring Inspection

• Visually inspect wiring harnesses for signs of wear, fraying, or breaks.
• Repair or replace damaged wires with appropriate gauge wire and connectors.
• Ensure all connections are tight and secure.

6. Ground Connections Check

• Locate ground points in the engine bay and under the dashboard.
• Ensure all ground connections are clean and tight.
• Use a multimeter to verify continuity from the ground point to the battery negative terminal.