2009 Ford F150 Fuel Pump Fuse: Location, Replacement, and Troubleshooting Guide
The bottom line up front: If your 2009 Ford F-150 cranks but won't start, the fuel pump fuse should be one of the first things you check. The fuel pump fuse on the 2009 F-150 is a 20-amp mini-blade fuse located in the under-hood Power Distribution Box (also called the Battery Junction Box) on the driver's side near the battery. It is labeled as Fuse 27 in the fuse box diagram. Replacing a blown fuse costs less than $5 and takes about five minutes. However, if the fuse blows again after replacement, you likely have a deeper issue with the fuel pump relay, the wiring, or the fuel pump itself.
This guide walks you through everything you need to know about the 2009 Ford F150 fuel pump fuse, including its exact location, how to test it, what symptoms indicate a blown fuse, and what to do if it keeps failing.
Where Is the 2009 F-150 Fuel Pump Fuse Located?
The 2009 Ford F-150 has two fuse boxes: one inside the cabin under the dashboard and one under the hood. The fuel pump fuse is not in the interior fuse panel. It is in the Power Distribution Box under the hood.
Step-by-step to find it:
- Open the hood of your F-150.
- Look on the driver's side, near the battery.
- You will see a black plastic box with a cover. This is the Power Distribution Box.
- Press the release tabs on the sides of the cover and lift it off.
- On the inside of the cover, there is a diagram. Look for the label "Fuse 27" or "Fuel Pump".
- The fuse is a 20-amp mini-blade fuse. It is usually yellow or clear with the number "20" printed on top.
According to the 2009 F-150 owner's manual, Fuse 27 is specifically assigned to the fuel pump circuit in the engine compartment fuse box. The fuel pump relay is also located in the same box, typically labeled R4 or "Fuel Pump Relay".
How to Check the 2009 F-150 Fuel Pump Fuse
Checking the fuse is straightforward and requires no special tools. You just need your eyes and maybe a pair of needle-nose pliers or the fuse puller tool that is often stored inside the fuse box.
Step 1: Remove the fuse.
Use the fuse puller tool found in the fuse box or a pair of pliers. Gently pull the fuse straight out of its slot.
Step 2: Inspect the fuse.
Look through the clear plastic top of the fuse. You should see a metal strip connecting the two prongs. If the strip is broken, melted, or has a black mark, the fuse is blown.
Step 3: Test the fuse with a multimeter.
If you cannot see visible damage, use a multimeter set to the continuity setting. Touch one probe to each prong of the fuse. If you hear a beep, the fuse is good. If there is no beep, the fuse is blown.
Step 4: Replace if necessary.
If the fuse is blown, replace it with a 20-amp mini-blade fuse of the same type. Do not use a higher amp fuse, as this can cause wiring damage or a fire hazard.
What Happens When the Fuel Pump Fuse Blows?
When the fuel pump fuse blows, the fuel pump stops working, which means no fuel is sent to the engine. Here are the exact symptoms you will notice:
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Engine cranks but will not start: The starter motor turns the engine over, but the engine does not fire up. This is the most common symptom.
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No fuel pressure: If you check the fuel rail (the metal pipe on top of the engine), there will be no pressure when you turn the key to the "ON" position.
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Check Engine Light may come on: The computer detects the loss of fuel pressure and may turn on the check engine light. Common trouble codes include P0087 (Fuel Rail Pressure Too Low) or P0231 (Fuel Pump Secondary Circuit Low). Other related codes include P0230 and P0232, which are fuel pump primary circuit codes.
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No sound from the fuel pump: When you turn the key to "ON" (without starting the engine), you should hear a faint humming sound from the fuel pump for about 2–3 seconds. If you hear nothing, the fuse or the pump is dead.
The Known Fuse 27 Problem on 2009–2014 F-150s
This is important to understand if you own a 2009 Ford F-150. Ford issued Technical Service Bulletin (TSB 15-0137) to address a known issue with Fuse 27 on 2009–2014 F-150s and 2010–2014 Raptors.
What happens: The factory fuel pump circuit runs through Fuse 27 in the under-hood Battery Junction Box. Over time, that cavity can overheat and melt, causing crank/no-start issues and intermittent stalling. The plastic around the fuse holder can crack or melt, leaving the circuit open without the fuse actually blowing.
Why it fails: The 20-amp rating is a lot of power to flow through such a small mini-blade fuse with small contacts. Heat becomes an issue, and over time, under heavy load on the fuel pump, the fuse cavity can degrade. Excessive current draw, short circuits, or weak connections in the fuel pump circuit can also cause the fuse to overheat and melt the plastic housing.
Common symptoms of the Fuse 27 issue:
- DTC codes P0230, P0231, P0232
- Crank/no start
- Intermittent stalling
- Hard starts
- No fuel pump prime sound
- Melted or discolored fuse cavity
- Loose fuse fit
- Burnt plastic smell
The fix: Ford offers a Fuse 27 relocation kit (Part No. EL3Z-14293-A) that moves the fuel pump fuse to a new, more reliable location in the junction box with upgraded terminals. The kit costs around $20 and takes about 1–2 hours to install with basic hand tools. Many owners choose to install this kit as a precaution even if their fuse looks fine.
Common Causes of a Repeatedly Blown Fuel Pump Fuse
If you replace the fuse and it blows again immediately or within a few days, there is a problem beyond a simple fuse. Do not keep replacing the fuse without finding the root cause. Here are the most common reasons:
1. Short circuit in the fuel pump wiring.
The wires running from the fuse box to the fuel pump can rub against the chassis or other metal parts. This can wear through the insulation and cause a short circuit (ground fault). This is common on F-150s where the wiring passes near the frame rail.
2. Faulty fuel pump relay.
The fuel pump relay is a small electronic switch that controls power to the fuel pump. Over time, relay contacts can get carbon buildup and create more resistance, causing the fuse to blow. Replacing the fuse and the relay together often solves the problem for another 100,000 miles.
3. Failing fuel pump.
An aging fuel pump can draw more amperage than it should. This increased current draw can cause the fuse or its housing to overheat. If the pump itself is failing, it should be replaced.
4. Corroded Fuel Pump Driver Module (FPDM).
On the 2009–2014 F-150, the Fuel Pump Driver Module is mounted above the spare tire against the steel frame crossmember. The direct contact between dissimilar metals, combined with road salt and moisture, causes severe galvanic corrosion that can crack the module's housing and destroy the internal electronics. A failing FPDM can cause symptoms that mimic a blown fuse, including stalling, hesitation, and no-start conditions.
How to Tell the Difference: Fuse vs. Fuel Pump vs. FPDM
Before you go replacing parts, it helps to narrow down the problem. Here is a practical diagnostic approach for a 2009 F-150 that cranks but won't start:
Step 1: Check Fuse 27.
Open the under-hood fuse box, remove Fuse 27, and inspect both the fuse and the slot for any signs of melted plastic, discoloration, or heat damage. If the fuse is blown, replace it with a 20-amp mini-blade fuse and try starting the truck.
Step 2: Listen for the fuel pump prime.
Turn the key to "ON" without cranking. You should hear a faint hum from the fuel tank area for 2–3 seconds. If you hear nothing, the pump is not getting power.
Step 3: Check the fuel pump relay.
Find another relay in the junction box with the same part number and size, swap it with the fuel pump relay, and try again. If the truck starts, buy a new relay.
Step 4: Inspect the Fuel Pump Driver Module (FPDM).
Lower the spare tire to access the module. Look for white, crusty corrosion, swelling, or cracks in the housing. If the module rattles when shaken, it is bad. A new FPDM costs around $50–$100 and is a common DIY fix.
Step 5: Test the fuel pump itself.
If fuse, relay, and FPDM all check out, the in-tank fuel pump may be the culprit. This is the most expensive repair, so make sure you rule out the cheaper options first.
Upgrading Your Fuel Pump: Why KEMSO Makes Sense
Once you have confirmed that your fuel pump itself needs replacement, choosing the right part matters. A quality fuel pump ensures reliable fuel delivery, proper pressure, and long-term durability.
KEMSO Fuel Pumps are a smart choice for your 2009 Ford F-150. Here is why:
- High-performance quality: KEMSO fuel pumps are built to deliver consistent fuel pressure and flow, meeting or exceeding OEM specifications.
- OEM replacement: Every KEMSO fuel pump is designed as a direct OEM replacement, so it bolts in without modifications and performs like the factory part.
- Lifetime warranty: KEMSO stands behind its products with a lifetime warranty, giving you peace of mind that your fuel pump is covered for as long as you own your truck.
When you buy a KEMSO fuel pump, you are getting a reliable replacement that will keep your 2009 F-150 running smoothly. Visit https://www.kemsoracing.com/ to browse the full lineup of KEMSO fuel pumps and other performance parts.
Prevention Tips for 2009 F-150 Owners
If you want to avoid getting stranded by fuel pump fuse issues, here are some practical steps you can take:
1. Install the Fuse 27 relocation kit.
This is the single best preventive measure for 2009–2014 F-150s. The kit moves the fuel pump fuse to a more reliable cavity and eliminates the weak point in the factory design. Many owners install it proactively, even if their fuse still looks fine.
2. Inspect Fuse 27 regularly.
Every oil change, take a quick look at Fuse 27 in the under-hood fuse box. Look for discoloration, melted plastic, or a loose fit. Catching the problem early is much cheaper than a tow bill.
3. Keep the underbody clean.
The Fuel Pump Driver Module is prone to corrosion because of road salt and moisture. Rinsing the underside of your truck regularly, especially in winter, can extend the life of the FPDM.
4. Address fuel pump issues early.
If your truck hesitates during acceleration, stalls unexpectedly, or takes longer to start, investigate before the pump fails completely. Early diagnosis saves you from being stranded.
Final Thoughts
The 2009 Ford F150 fuel pump fuse is a simple part that causes big problems when it fails. It costs less than $5 to replace and takes minutes to check, but it can leave you stranded if you do not know where to look or what to do. The fuse is located at position #27 in the under-hood Power Distribution Box, and it is a 20-amp mini-blade fuse.
If your F-150 cranks but won't start, start with the fuse, check the relay, then inspect the Fuel Pump Driver Module before spending money on a new fuel pump. And remember—if you do need a replacement fuel pump, choose a KEMSO fuel pump for high-performance OEM-quality reliability backed by a lifetime warranty. Visit https://www.kemsoracing.com/ to find the right pump for your 2009 Ford F-150.