Ford F-150 Lightning Speedometer Isn't Working

Common Causes of Speedometer Malfunctions in Your Ford F-150 Lightning and How to Fix Them

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Reviewed by
Andrew Hajjar
Written by RepairPal Car Genius
Updated January 14, 2025
0%
35% chance it's the
Vehicle Speed Sensor (VSS)
0%
28% chance it's the
Speedometer
0%
23% chance it's the
Electrical Issue
0%
14% chance it's
Something else
The most common reasons a Ford F-150 Lightning speedometer isn't working are the vehicle speed sensor (VSS), a faulty speedometer, or an electrical issue.
  • Vehicle Speed Sensor (VSS): A faulty vehicle speed sensor can result in inaccurate speed readings and erratic transmission shifting.
  • Speedometer: A faulty speed sensor or a broken connection in the speedometer circuit can result in inaccurate speed readings.
  • Electrical Issue: A blown fuse or a short circuit in the wiring can cause various electrical issues in the vehicle's systems.
Proper diagnosis will determine the exact cause of your symptom, saving you money on unnecessary repairs. The diagnostic experts at RepairPal Certified shops have the right tools and experience to solve any symptom.

Troubleshooting a Non-Working Speedometer in a Ford F-150 Lightning

When troubleshooting a non-working speedometer in a Ford F-150 Lightning, it's essential to adopt a methodical diagnostic approach. Start by checking for any trouble codes using an OBD-II scanner, as this can quickly indicate if the vehicle speed sensor (VSS) is at fault. If the check engine light is illuminated, this step is crucial. Next, inspect the speedometer drive gears for wear; if they appear damaged, replacing them may restore functionality. Following this, examine the wiring for any signs of fraying or disconnection, as electrical issues can often lead to speedometer failure. If these simpler fixes do not resolve the problem, consider assessing the axles and sensors for faults, as these components can also impact speedometer performance. Finally, after any repairs, recalibrating the speedometer ensures that it provides accurate readings. By following this structured approach, you can effectively diagnose and fix the speedometer issue in your Ford F-150 Lightning.

What to Check When the Speedometer Isn't Working in a Ford F-150 Lightning?

When your Ford F-150 Lightning's speedometer stops working, it can be frustrating, but several common problems can be checked to diagnose the issue effectively. Start by inspecting the Vehicle Speed Sensor (VSS), as this component is often the primary culprit behind speedometer failures. If the VSS appears to be functioning correctly, the next step is to examine the speedometer itself for any signs of malfunction. Additionally, electrical issues, such as loose connections or damaged wiring, can disrupt the speedometer's operation, so it's crucial to check these as well. While troubleshooting, consider the potential costs of repairs, as they can vary significantly based on the underlying problem. It's also wise to check for any recalls related to speedometer issues, as manufacturers may have solutions available. Lastly, keep in mind that newer models may receive over-the-air updates that could resolve software-related speedometer problems. By systematically checking these components, you can effectively diagnose and potentially fix the speedometer issue in your Ford F-150 Lightning.

Why is the Speedometer Not Working in a Ford F-150 Lightning?

When the speedometer in your Ford F-150 Lightning stops functioning, it’s crucial to address the issue promptly. Ignoring a malfunctioning speedometer can lead to serious safety risks, such as driving at unsafe speeds without realizing it, which could result in accidents or traffic violations. Additionally, the underlying problems—whether they stem from a faulty vehicle speed sensor, electrical issues, or worn gears—can escalate if left unchecked, potentially leading to more extensive and costly repairs. For instance, a malfunctioning speed sensor may trigger a check engine light and indicate a trouble code, signaling that the issue could affect other vehicle systems. Therefore, diagnosing the cause of the speedometer failure not only ensures your safety on the road but also helps maintain the overall health of your vehicle, preventing further damage and costly repairs down the line. Taking immediate action to investigate and resolve the problem is essential for both your safety and the longevity of your Ford F-150 Lightning.

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Ford F-150 Lightning Speedometer Not Working