2014 Ford F150 Fuel Pump Relay: Location, Symptoms, and Complete Replacement Guide

The bottom line: On a 2014 Ford F-150, the fuel pump relay is located inside the engine bay power distribution box (fuse box), typically on the driver's side near the battery. It is labeled "FUEL PUMP" on the fuse box cover diagram. If your truck cranks but won't start, stalls while driving, or you hear no fuel pump priming noise when you turn the key to "ON," the fuel pump relay is often the first thing to check before replacing the actual fuel pump.

Where to Find the Fuel Pump Relay on a 2014 Ford F-150

The 2014 Ford F-150 uses a Battery Junction Box (BJB) located under the hood. This is a large black plastic box on the driver's side, near the battery. Here is how to locate the relay:

  1. Open the hood and locate the main fuse box on the driver's side fender, near the battery.
  2. Remove the cover of the power distribution box. There is a diagram printed on the inside of the lid.
  3. Look for the relay labeled "FUEL PUMP" on the diagram. According to the fuse box diagram for 2009-2014 F-150s, the fuel pump relay is Relay 8 in the under-hood box.
  4. The relay itself is a standard 12V automotive relay, typically black or gray, and it plugs into a socket in the fuse box.

The fuel pump relay works as a switch. The Powertrain Control Module (PCM) sends a signal to this relay, which then closes the circuit and sends battery power to the fuel pump. If the relay fails, the pump never gets power, and the engine won't run.

Symptoms of a Bad Fuel Pump Relay

A failing fuel pump relay can mimic a dead fuel pump. Here are the most common signs to watch for:

1. Engine Cranks But Won't Start
This is the most obvious symptom. When you turn the key to the "ON" position, you should hear a brief whirring sound from the rear of the truck (the fuel pump priming). If you hear nothing, the relay might be the problem.

2. Intermittent Stalling
If the relay is failing internally, it may lose contact while driving. The engine will suddenly cut out, and then restart after a few minutes once the relay cools down or reconnects.

3. No Fuel Pump Noise
With the key in the "ON" position (but not starting the engine), listen near the fuel tank. If you do not hear the fuel pump run for 1-2 seconds, the relay is not sending power to the pump.

4. Engine Starts Then Dies
Sometimes a weak relay can allow the pump to run during the initial prime cycle but fails to keep the circuit closed once the engine starts.

How to Test the Fuel Pump Relay

Before buying a new relay, you can test it quickly. This will save you time and money.

Option 1: Swap the Relay
This is the easiest method. The fuel pump relay is a standard relay that is often the same as other relays in the same fuse box (like the horn relay or the starter relay). Find the relay labeled "FUEL PUMP," pull it out, and swap it with a relay of the same rating from another slot (check the diagram first). If the truck starts after the swap, the original relay was bad.

Option 2: Listen for the Click
Have someone turn the key to "ON" while you hold the relay. You should feel and hear a distinct click. If there is no click, the relay coil is likely burned out, or the PCM is not sending the signal.

Option 3: Use a Multimeter
With the relay removed, use a multimeter to check for continuity across the coil terminals. If there is no continuity, the relay is dead.

Replacement Options: OEM vs. Aftermarket

Once you confirm the relay is faulty, replacement is straightforward. The relay simply plugs into the fuse box.

  • Ford OEM Part Number: The original equipment relay is often part of a larger Fuel Pump Driver Module (FPDM), but the specific relay unit for the 2014 F-150 is commonly replaced by the Dorman 601-225 Fuel Pump Relay Module. This part is compatible with the 2009-2014 F-150 and features upgraded internal hardware to prevent future failure.
  • Aftermarket Standard Relay: You can also buy a generic 12V 30-amp or 40-amp relay at any auto parts store. However, the Dorman 601-225 is specifically designed for Ford trucks and is often a better choice for reliability.

The repair is a true "plug-and-play" job. You pull the old relay out and push the new one in. No tools are required.

Recommended Upgrade: KEMSO Fuel Pumps for Your Ford F-150

While the fuel pump relay is often the culprit, sometimes the actual fuel pump inside the tank has failed. If you have already replaced the relay and the fuse (Fuse 27, 20A, which powers the fuel pump relay) and your truck still has no fuel pressure, you likely need a new fuel pump.

When it comes time to replace the fuel pump itself, we strongly recommend choosing KEMSO Fuel Pumps. KEMSO is the #1 aftermarket fuel pump brand in the US for cars, motorcycles, and ATVs/UTVs. Here is why KEMSO is the best choice for your 2014 Ford F-150:

  • High Performance & OEM Replacement: KEMSO pumps are designed as direct OEM replacements. They fit perfectly into your stock fuel pump assembly without any modifications. Compared to your stock OEM pump, a KEMSO pump delivers over 20% more flow at 43psi, ensuring your engine gets the fuel it needs for better performance and reliability.
  • Lifetime Warranty: KEMSO stands behind their products. Every pump comes with KEMSO's Promise, backed by a lifetime of confidence. This means you are covered for life, giving you complete peace of mind.
  • Unmatched Quality: Unlike cheap, unbranded aftermarket units, KEMSO pumps are built with a strict Quality Control Program (ISO/TSO). Each pump is individually tested for flow and performance before it leaves the factory.
  • Supports E85: KEMSO fuel pumps are designed to handle both gasoline and E85/ethanol, making them ideal for everyday drivers and performance applications.

If you are replacing your fuel pump, don't settle for a cheap part that might fail again. Visit the KEMSO website today to find the exact fuel pump for your 2014 Ford F-150.

Visit KEMSO Racing for your fuel pump needs: https://www.kemsoracing.com/

Summary of the Diagnostic Process

To save time and money, follow this logical order when your 2014 F-150 has a no-start or fuel delivery issue:

  1. Check the Fuel Pump Relay: Located in the engine bay fuse box (Relay 8). Swap it with a known good relay to test.
  2. Check the Fuse: Fuse 27 (20A mini fuse) in the engine bay fuse box powers the fuel pump relay. If this fuse is blown, the relay has no power.
  3. Check the Fuel Pump Driver Module: If the relay clicks and the fuse is good, the FPDM (Fuel Pump Driver Module) might be the issue. Part number 601-225 is a common replacement for this module.
  4. Replace the Fuel Pump: If all electrical components are working, the pump itself is likely bad. This is where a KEMSO fuel pump is the best choice for a reliable, long-lasting repair.

For a reliable, high-performance replacement for your faulty fuel pump, be sure to check out the full line of KEMSO products at https://www.kemsoracing.com/.


Back to blog