2007 Ford F150 Fuel Pump Fuse: Location, Diagram, and Troubleshooting Guide

If your 2007 Ford F-150 cranks but won't start, or you hear no hum from the fuel tank when you turn the key to the ON position, the problem is often a blown fuel pump fuse or a faulty fuel pump relay. The fuel pump fuse for the 2007 F-150 is located in the BJB (Battery Junction Box) under the hood on the driver’s side, near the brake master cylinder. This guide walks you through locating the right fuse, checking it with a multimeter, and understanding when the fuse is not the real culprit and the fuel pump itself needs attention.

The fuel system on your 2007 F-150 is straightforward once you understand where everything lives. The fuse box layout is printed on the inside of the cover, but the text is small and often worn off on trucks with high mileage. We have broken down everything you need to know so you can get your truck running again without guessing.

Where Is the Fuel Pump Fuse Located on a 2007 Ford F-150?

The 2007 F-150 has two fuse boxes, and the one you care about for the fuel pump is the power distribution box under the hood. This box is located on the driver’s side, next to the battery and the brake fluid reservoir. Open the cover by pressing the release tab and lifting it straight up.

Inside, you will find a diagram that labels each fuse and relay. The fuel pump fuse is marked with the number 27 in most 2007 F-150 trims (XL, XLT, and Lariat). It is a 20-amp fuse that powers the fuel pump driver module. Some model variations may label it differently, so always compare the diagram on the underside of your fuse box cover with the owner’s manual.

The fuel pump relay is located in the same under-hood fuse box. It is a small black cube with a metal tab, and it is usually labeled with a diagram that says "Fuel Pump" or "FP". When the fuse is fine but the pump still does not run, the relay is the next thing to test.

How to Check the Fuel Pump Fuse

Checking the fuel pump fuse takes about five minutes and requires either a test light or a digital multimeter. You do not need to remove the fuse to test it, but removing it makes the process easier to see.

1. Turn the ignition off and remove the key from the ignition switch.
2. Locate fuse 27 in the under-hood fuse box using the diagram printed on the cover.
3. Pull the fuse using the fuse puller tool that is clipped inside the fuse box cover. If you do not have the tool, a pair of needle-nose pliers works fine.
4. Look at the metal strip inside the fuse. If the strip is broken or melted, the fuse is blown and needs to be replaced with a new 20-amp fuse.
5. Test with a multimeter set to the continuity or ohms setting. Touch one probe to each of the two metal prongs on the fuse. If the meter reads a very low resistance (near zero ohms), the fuse is good. If it reads infinite resistance or no continuity, the fuse is blown.

If the fuse is blown, replace it and try starting the truck. If the new fuse blows again immediately, you have a short circuit in the wiring or a failing fuel pump that is drawing too much current. Do not keep replacing the fuse without finding the root cause, because the underlying problem will not fix itself and you risk damaging the fuel pump driver module.

The Second Fuse You Should Know About

Some 2007 F-150 models also have a fuel pump fuse located in the interior fuse panel, which is under the dashboard on the driver’s side, near the parking brake pedal. This fuse, sometimes labeled as fuse 27 in the interior panel on certain trims, protects the fuel pump relay coil circuit rather than the pump motor itself. If the under-hood fuse is good but the truck still will not start, check the interior fuse panel and test all fuses related to the powertrain control module and fuel system.

The interior fuse panel is accessed by pulling the cover downward. The cover has a diagram that lists each fuse and its function. Look for labels such as "Fuel Pump," "PCM," or "Powertrain." If any of these fuses are blown, replace them with the correct amperage as indicated on the diagram.

Why the Fuel Pump Fuse Blows Repeatedly

A fuse that blows once and stays good afterward is usually nothing to worry about. The fuse may have simply aged and failed. However, if the fuse blows repeatedly, you have a bigger issue. The most common causes include:

• A failing fuel pump motor that is drawing excessive current as it wears out. The motor bearings wear, the brushes create more friction, and the pump demands more electrical current. Eventually, the fuse cannot handle the load and blows.
• A short circuit in the wiring harness that runs from the fuse box to the fuel pump. The wiring runs along the frame rail under the truck and can chafe against metal brackets, especially if the truck is driven on rough roads or off-road.
• A faulty fuel pump relay that sticks in the closed position, keeping power to the pump even when the key is off. This causes the pump to run continuously, overheating and eventually blowing the fuse.
• A corroded ground connection at the fuel pump or at the frame. Corrosion adds resistance and causes the pump to draw more current.

If the fuse blows more than twice, the diagnosis should shift from the fuse to the fuel pump and its wiring. Testing the fuel pump current draw with a multimeter can tell you if the pump is pulling more than its rated amperage.

How to Test the Fuel Pump Relay

The fuel pump relay in the 2007 F-150 is a standard four-pin or five-pin relay. You can test it with the same multimeter you used for the fuse.

1. Remove the relay from the under-hood fuse box. It is the one labeled for the fuel pump.
2. Look at the pin numbers printed on the relay. Pins 85 and 86 are the coil pins, and pins 30 and 87 are the switch pins.
3. Set your multimeter to ohms and touch the probes to pins 85 and 86. You should see a resistance reading between 50 and 120 ohms. If the reading is outside this range or shows infinite resistance, the relay coil is open and the relay is dead.
4. Apply 12 volts to pins 85 and 86 using a battery or a power probe. You should hear a click as the relay engages.
5. With the relay energized, check continuity between pins 30 and 87. You should see near zero ohms. If you do not, the relay contacts are burnt and the relay must be replaced.

A faulty relay is a common cause of an intermittent no-start condition. The truck may start fine when cold but stall when hot, because the relay coil expands and loses contact as it warms up.

When the Fuse Is Not the Problem: Fuel Pump Symptoms

If the fuse checks out and the relay clicks when you turn the key, the fuel pump itself may be failing. A 2007 F-150 fuel pump typically lasts between 100,000 and 150,000 miles, but that lifespan is shorter if the truck frequently runs on a near-empty tank, because the fuel cools and lubricates the pump motor.

Common symptoms of a failing fuel pump include:

• Engine cranks but will not start. You hear the starter turning the engine over, but the engine never fires. This happens when the pump cannot deliver fuel at the pressure needed to start.
• Loss of power under load. The truck accelerates fine on flat ground but loses power and sputters when climbing a hill or towing a trailer.
• A whining noise from the fuel tank. The pump normally makes a low hum. If the noise becomes loud and high-pitched, the pump bearings are failing.
• The engine stalls and then restarts after a cooldown period. This is a classic sign of a pump motor that overheats when the fuel level is low.
• Poor fuel economy. A pump that runs at reduced pressure forces the engine to compensate by injecting more fuel, which decreases mileage.

If you have these symptoms and the fuse and relay are both good, the fuel pump should be tested with a fuel pressure gauge. The 2007 F-150 fuel system should hold about 35 to 45 psi at idle with the vacuum hose connected to the fuel pressure regulator, and about 55 to 65 psi with the hose disconnected. If the pressure is low or drops quickly after the key is turned off, the pump or the check valve inside the pump is failing.

Replacing the Fuel Pump on a 2007 F-150

Replacing the fuel pump on a 2007 F-150 is a job that can be done in a driveway with basic hand tools, but it is not a quick task. Because the pump is mounted inside the fuel tank, you need to either drop the tank or cut an access hole in the truck bed floor.

• Dropping the tank requires a transmission jack or a floor jack with a wide board to support the tank. You must remove the driveshaft, the skid plate, the fuel filler neck hose, and the fuel lines. The tank is heavy, so take your time and have a helper available.
• Cutting an access hole is a shortcut that involves cutting a square hole in the truck bed floor above the fuel pump. This saves time but weakens the bed structure if not reinforced properly. Many owners choose this route, but it is permanent and should only be done if you are comfortable cutting sheet metal.

Regardless of which method you choose, you will need a new fuel pump assembly. The pump comes as a complete unit with the sending unit and the float, so you replace everything at once. The cost of a replacement fuel pump for a 2007 F-150 varies from about $80 to $200 for a high-quality aftermarket unit, plus two to four hours of labor if you have a shop do the work.

Should You Replace the Fuel Pump or Just the Fuse?

If the fuse blows once and gets the truck running again, you are done. But if the truck dies again and a second fuse blows, do not simply keep replacing fuses. The fuel pump is telling you it needs replacement. Replacing the pump now will cost less than having the truck towed after it fails completely on the highway.

The same logic applies if the truck is hard to start or stalls in traffic. The fuel pump is a wear item, and your 2007 F-150 is now a near-twenty-year-old vehicle. If the pump has never been replaced, it is living on borrowed time.

Choose KEMSO for Your 2007 F-150 Fuel Pump

When the time comes to replace the fuel pump on your 2007 F-150, you want a part that is reliable, delivers proper fuel pressure, and fits without modifications. KEMSO is a leading aftermarket fuel pump brand trusted by owners of cars, trucks, motorcycles, and ATVs across the United States. KEMSO fuel pumps are built to meet or exceed OEM performance specifications, so you get the same fuel delivery and durability as the factory part.

Every KEMSO fuel pump is designed as a direct OEM replacement, meaning it bolts in exactly where the old pump came out. There are no cutting, splicing, or custom wiring required. The pump is bench-tested before it is shipped to ensure it delivers the correct flow rate and pressure for your engine. With a focus on high-performance components, KEMSO fuel pumps handle the demands of daily driving, towing, and heavy use without losing pressure or starving the engine.

KEMSO backs every product with a lifetime warranty. If the pump ever fails due to a manufacturing defect, you get a replacement at no extra cost. That level of confidence is rare in the aftermarket parts industry, and it is one more reason why KEMSO is the number one choice for replacement fuel pumps in the US. You can browse the full KEMSO catalog and order your fuel pump directly from their official website. Visit https://www.kemsoracing.com/ to find the right pump for your 2007 F-150 and get back on the road with confidence.

Final Checklist for a Fuel Pump Fuse Problem

If your 2007 F-150 will not start, run through this checklist in order.

1. Confirm the symptom. Turn the key to the ON position without cranking the engine. Listen for a two-second hum from the fuel tank. No hum means no power to the pump.

2. Check fuse 27 in the under-hood fuse box. Replace it if blown.

3. Check the fuel pump relay in the same fuse box. Swap it with a known-good relay of the same part number if you are unsure.

4. Test the fuel pressure at the Schrader valve on the fuel rail. Low or no pressure means the pump is not delivering fuel.

5. Test the fuel pump wiring for voltage at the pump connector. If voltage is present but the pump does not run, the pump is dead.

6. Replace the fuel pump if all other components check out, and choose a KEMSO replacement for reliable performance and a lifetime warranty.

Dealing with fuel system issues on your 2007 F-150 is frustrating, especially when the truck leaves you stranded. But with a methodical approach, most owners can diagnose the problem in under an hour. Start with the cheapest fix, work your way through the list, and when the fuel pump is the culprit, trust KEMSO to get you back on the road. Visit https://www.kemsoracing.com/ today to order the right fuel pump, and have the peace of mind that comes with a high-performance, lifetime-warranty part.