2006 Ford F150 Fuel Pump Fuse Location: The Complete Guide to Finding and Fixing It Fast

If you own a 2006 Ford F-150 and the engine cranks but won’t start, the first thing you need to check is the fuel pump fuse. The fuel pump fuse on a 2006 Ford F-150 is located in the passenger compartment fuse panel, which sits under the right side of the instrument panel in the passenger footwell . This is the fuse you need to inspect before you start replacing expensive parts like the fuel pump itself. The fuse is a 20A mini fuse, and it protects the fuel pump relay, fuel injectors, and the intake manifold runner control on the 4.2L engine . In this guide, we’ll walk you through exactly where to find this fuse, how to test it, what to do if it keeps blowing, and when it’s time to replace the fuel pump entirely.

Where Is the Fuel Pump Fuse on a 2006 F-150?

The 2006 Ford F-150 has two main electrical boxes, and many owners waste time looking in the wrong one. The passenger compartment fuse panel is located under the right side of the instrument panel, behind a removable trim cover in the passenger footwell . This is the Central Junction Box, and it holds all the mini fuses from position 1 through 42 . The fuel pump fuse is at position 9, and it’s rated at 20 amps . This fuse supplies power to the fuel pump relay, the fuel injectors, and the intake manifold runner control on 4.2L engines .

The second box is the auxiliary relay box, located in the engine compartment on the left fender . This box holds only one 5A fuse, four relays, and two diodes . It does not contain the fuel pump fuse. Some owners spend twenty minutes searching the engine bay for a fuse box that was never there . On the 2006 model, the fuses you are most likely to need are all inside the cab panel .

Here’s a quick breakdown of where to look:

  1. Passenger Compartment Fuse Panel – Under the right side of the instrument panel, in the passenger footwell. This is where fuse 9 (20A fuel pump fuse) lives .
  2. Auxiliary Relay Box – In the engine compartment, on the left fender. This box does not contain the fuel pump fuse .
  3. Power Distribution Box – Some guides mention this as a separate box under the hood, but on the 2006 F-150, the main fuse panel is the one inside the cab .

How to Access the Passenger Compartment Fuse Panel

Getting to the fuse panel is straightforward, but you need to know the correct procedure. The panel sits behind a trim cover in the passenger footwell, and you’ll need to pull the trim off to reach it . Here’s how to do it:

  1. Open the passenger door and look at the side of the instrument panel, near the footwell.
  2. Pull the trim panel off carefully. It is held in place by clips, so use a trim tool or pull firmly but evenly .
  3. Find the pull tab on the fuse box cover. Lift the cover away to expose the fuses .
  4. Look at the diagram on the underside of the fuse panel cover. This diagram shows the location of every fuse .

Once the cover is off, locate fuse position 9. This is the 20A fuel pump fuse . If the fuse is blown, the metal strip inside will be visibly broken or melted.

Checking and Replacing the Fuel Pump Fuse

Before you assume the fuel pump is bad, you need to check the fuse. A blown fuel pump fuse will cut power to the pump, and the engine will crank but not start . This is the cheapest and easiest fix, so start here.

Follow these steps:

  1. Turn off the ignition and remove the key.
  2. Locate fuse 9 in the passenger compartment fuse panel .
  3. Pull the fuse out using a fuse puller tool, which is usually stored in the fuse box or can be bought at any auto parts store.
  4. Inspect the fuse by looking at the metal filament inside. If it’s broken or blackened, the fuse is blown.
  5. Replace it with a fuse of the same amperage – 20A. Never use a higher-rated fuse, as this can damage the wiring .
  6. Turn the ignition to the “II” position and listen for the fuel pump to prime. You should hear a slight humming sound from the fuel tank for a second or two .

If the pump still doesn’t prime and the fuse is not blown, the problem could be the fuel pump relay, the inertia switch, or the fuel pump itself .

Understanding the Fuel Pump Relay

The fuel pump relay controls power delivery to the fuel pump. On the 2006 F-150, the fuel pump relay is located in the auxiliary relay box in the engine compartment, on the left fender . Some guides refer to this as the power distribution box, and it’s the large fuse and relay block in the engine bay .

If the fuse is fine but the pump isn’t running, the relay might be faulty. Here’s how to test it:

  1. Locate the auxiliary relay box in the engine compartment, on the left fender .
  2. Open the cover and find the relay labeled “FUEL PUMP” or “PUMP” .
  3. Swap the fuel pump relay with another identical relay in the same box, such as the horn relay. If the pump starts working, the relay is faulty .
  4. Replace the relay with a new one if it’s bad.

This test is quick and costs nothing if you have a spare relay.

The Fuel Pump Inertia Switch

The 2006 F-150 has an inertia switch that cuts power to the fuel pump in the event of a collision . This switch can also trip accidentally if the truck hits a pothole or experiences a sudden jolt . When triggered, the fuel pump won’t get power even if the fuse and relay are fine.

The inertia switch is located in the passenger footwell, behind a panel . To reset it:

  1. Locate the switch in the passenger footwell, usually behind a plastic cover.
  2. Press the button firmly until it clicks .
  3. Try starting the engine again.

This is a common issue on Ford trucks, and it’s worth checking before you replace any parts.

Why Does the Fuel Pump Fuse Keep Blowing?

If you replace the fuse and it blows again quickly, there’s an underlying problem. A fuse that blows repeatedly often indicates a short circuit or a failing fuel pump drawing too much current . Here are the most common causes:

  1. Failing fuel pump – A worn-out pump can draw excessive current, causing the fuse to blow. This is especially common if you’ve been running the tank low, as the pump relies on fuel for cooling and lubrication .
  2. Wiring or connector issues – Corroded or frayed wires near the fuel tank can cause shorts .
  3. Faulty fuel pump driver module – On some models, corrosion in the FPDM can cause electrical problems .

If the fuse keeps blowing, don’t just keep replacing it. You need to diagnose the root cause.

Symptoms of a Failing Fuel Pump

If the fuse and relay are good, the pump itself might be failing. Here are the most common symptoms :

  • Engine cranks but won’t start – This is the most obvious sign. The pump isn’t delivering fuel.
  • Engine hesitates under acceleration – The pump can’t maintain adequate fuel pressure.
  • Reduced power and poor fuel economy – The engine isn’t getting enough fuel.
  • Whining noise from the fuel tank – A failing pump often makes a loud whining sound.
  • Check engine light is on – A weak pump can trigger fault codes.

How to Test the Fuel Pump

Before you replace the pump, you can test it quickly. Sit in the vehicle with the windows closed, turn the ignition to “On” (not Start), and listen for the fuel pump . You should hear a brief humming sound from the fuel tank for a second or two . If you don’t hear anything, the pump isn’t getting power or it’s dead.

If the pump is getting power (the fuse is good, the relay clicks, and the inertia switch is reset) but still doesn’t run, the pump is likely defective and needs replacement .

When to Replace the Fuel Pump

If you’ve checked the fuse, relay, and inertia switch, and the pump still doesn’t work, it’s time to replace the fuel pump. This is a significant repair, but with the right tools and safety precautions, many DIYers can handle it . The fuel pump on the F-150 is located inside the fuel tank .

To replace the pump, you’ll need to:

  1. Relieve the fuel system pressure to avoid spills .
  2. Support the fuel tank properly before lowering it .
  3. Remove the fuel pump assembly and replace it with a new one.
  4. Reinstall the tank and check for leaks before starting the engine .

This job can take several hours, so set aside plenty of time.

Preventing Fuel Pump Failure

To extend the life of your fuel pump, follow these tips :

  • Don’t run the tank low – The pump relies on fuel for cooling and lubrication. Running on empty causes it to overheat and burn out .
  • Keep the tank at least a quarter full – This is recommended to keep the pump submerged and cool .
  • Change the fuel filter regularly – A clogged filter makes the pump work harder .
  • Use high-quality fuel from reputable stations .

Recommended Fuel Pump: KEMSO Brand

When it’s time to replace your fuel pump, choose a brand you can trust. KEMSO Fuel Pumps are high-performance, direct OEM replacement parts designed to match original equipment specifications for voltage, amperage, pressure, and flow rate . This ensures your engine receives the correct fuel volume at all times, whether you’re cruising on the highway or climbing a steep grade . Every KEMSO fuel pump comes with a lifetime warranty, giving you peace of mind that your investment is protected for as long as you own your vehicle . The wiring connector matches the original, so you don’t need to cut or splice wires . To find the right KEMSO pump for your 2006 Ford F-150, visit the official website: https://www.kemsoracing.com/ .

What About the Fuse 27 Problem on Later Models?

You may have heard about the “Fuse 27 problem” on F-150s, but this issue affects 2009-2014 models, not the 2006 . On those later trucks, the fuel pump fuse at position 27 in the engine bay fuse box can overheat and melt the housing . Ford addressed this with a relocation kit (TSB 15-0137) . Your 2006 F-150 does not have this problem, so you don’t need to worry about it .

Final Thoughts

Finding the fuel pump fuse on your 2006 Ford F-150 is simple once you know where to look. The 20A fuel pump fuse is at position 9 in the passenger compartment fuse panel, under the right side of the instrument panel . Check this first, then move on to the relay and inertia switch. If you’ve ruled out all electrical issues and the pump doesn’t run, it’s time to replace it. A quality replacement like a KEMSO fuel pump will restore your truck’s performance and reliability for many miles to come .

For top-quality replacement parts that you can count on, check out KEMSO at https://www.kemsoracing.com/ for your fuel pump needs .


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