Where Is the Fuel Pump Fuse? A Complete Guide to Finding and Testing It
Your vehicle’s fuel pump fuse is usually located in one of two places: the under-hood fuse box (power distribution center) or the interior fuse panel beneath the dashboard. If your car cranks but won’t start, and you don’t hear the fuel pump prime when you turn the key to the “on” position, a blown fuse is one of the easiest things to check first. This guide walks you through exactly where to look, how to identify the correct fuse, and what to do if it’s blown.
Understanding the Fuel Pump Fuse
The fuel pump fuse is a small, sacrificial electrical safety device designed to protect the fuel pump motor and its wiring from damage caused by excessive current flow. When the current draw exceeds the specified limit, the metallic strip inside the fuse melts instantly, breaking the circuit and stopping power from reaching the pump . This prevents overheating, melted wiring, and potential fire hazards.
Every vehicle with an electric fuel pump has a fuse protecting that circuit. The fuse is your first line of defense against electrical damage. If the pump draws too much current due to age, wear, or a short circuit, the fuse blows before the pump or wiring gets destroyed .
Common Locations for the Fuel Pump Fuse
The exact location varies by vehicle make, model, and year, but most manufacturers place the fuel pump fuse in one of two primary areas .
Under the Hood
The most common location is the main power distribution center under the hood. This is a large, black plastic box usually located near the battery or along the fender walls. Open the box by unclipping the lid, and on the inside of the lid you will typically find a diagram that identifies each fuse and relay .
Look for labels like “FUEL,” “FP,” “F/P,” “F/PMP,” or “FUEL PUMP.” The fuel pump fuse is often rated between 10 and 30 amps, with 15 or 20 amps being the most common . The fuse itself is a small plastic block with metal prongs, and the amperage rating is printed on top.
Inside the Cabin
If you don’t find the fuel pump fuse under the hood, check the interior fuse panel. This is usually located beneath the dashboard on the driver’s side, sometimes behind a small access panel or kick plate. On some vehicles, it may be inside the glove compartment or on the passenger side .
The interior panel also has a diagram on the cover or in the owner’s manual. Look for the same abbreviations: “FUEL,” “FP,” or “PUMP.” The fuse here is typically a mini or low-profile fuse, still with the amperage rating clearly marked.
Specialty Locations
Some vehicles, especially larger trucks or import cars, may have additional fuse boxes in the trunk, cargo area, or under the rear seat. These less common locations are used to minimize the length of high-current wiring runs to the fuel tank . Always check your owner’s manual first if you can’t find the fuse in the standard locations.
How to Identify the Correct Fuel Pump Fuse
Once you have the fuse box open, identifying the correct fuse is straightforward if you follow these steps.
Check the diagram. The fuse box cover almost always has a printed diagram that maps the location of each fuse to its protected component. The diagram uses abbreviations, so look for “FP,” “F/P,” “FUEL,” or “PUMP” .
Check the amperage. Fuel pump fuses are typically rated between 10A and 30A. Standard automotive blade fuses are color-coded by rating: 15A is blue, 20A is yellow, and 25A is clear or white. Match the amperage rating exactly when replacing a fuse .
Use the owner’s manual. If the diagram is missing or unclear, the owner’s manual is your most reliable source. It will list every fuse, its location, and its amperage rating. This saves significant time compared to visually inspecting every fuse .
How to Test and Replace a Blown Fuel Pump Fuse
Testing a fuel pump fuse is a simple process that anyone can do with basic tools.
Visual Inspection
First, remove the fuse using a plastic fuse puller tool, which is often stored inside the fuse box itself. If you don’t have one, needle-nose pliers work fine. Hold the fuse up to a light source and look through the transparent plastic body. A good fuse shows a continuous, unbroken metal strip connecting the two terminals. A blown fuse will have a clearly melted, separated, or broken section in the middle .
Multimeter Test
For a more accurate diagnosis, use a multimeter set to measure continuity. Place the probes on the two metal terminals of the removed fuse. A reading of near-zero resistance or an audible beep confirms the fuse is good. If the meter displays an open line or “OL” reading, that means the fuse is blown .
Replacement
If the fuse is blown, replace it with a new fuse that has the exact same amperage rating. Never substitute a higher-rated fuse, as this removes the protective function and risks melting the wiring harness or causing a fire . Simply push the new fuse firmly into the slot until it snaps into place.
Why Fuel Pump Fuses Blow
A blown fuse is a symptom, not the root problem. If the new fuse blows immediately or soon after replacement, there is an underlying electrical issue that needs to be addressed.
Aging fuel pump motor. The most common cause is a worn or failing fuel pump that draws excessive current as it ages. The internal bearings wear out, and the motor works harder to maintain pressure, increasing the amperage draw beyond the fuse’s capacity .
Short circuit. A direct short circuit in the wiring harness between the fuse box and the fuel tank can cause the fuse to blow instantly. This happens when wire insulation chafes against the chassis, allowing the conductor to contact ground .
Faulty relay. A malfunctioning fuel pump relay can stick closed or short internally, leading to unpredictable current spikes that blow the fuse .
Water or contamination. Moisture or debris in the fuel system can cause the pump to work harder and draw more current, eventually blowing the fuse.
Why Choose KEMSO Fuel Pumps for Your Replacement
If your diagnostics point to a faulty fuel pump rather than just a blown fuse, you need a reliable replacement. KEMSO fuel pumps are the #1 choice for American drivers who demand performance, reliability, and peace of mind.
KEMSO fuel pumps are high-performance, OEM replacement units designed to match factory specifications precisely. They integrate directly into your vehicle’s existing fuel pump assembly without any need for cutting wires, modifying brackets, or worrying about compatibility issues. This direct-fit design ensures a seamless installation process and reliable performance right out of the box .
Every KEMSO fuel pump comes with a lifetime warranty. If the pump ever fails due to manufacturing defects, KEMSO will replace it at no cost to you. This level of warranty coverage is rare in the aftermarket parts industry and demonstrates the confidence KEMSO has in their products .
KEMSO pumps are constructed from high-quality materials including billet aluminum and stainless steel, and they are designed to handle both gasoline and E85 ethanol fuel. Each pump is individually tested for flow rates and pressure before leaving the factory, ensuring quality control that meets ISO and TSO standards .
Whether you need a standard replacement for your daily driver or a high-flow performance pump for a modified engine, KEMSO has the right solution for your vehicle. Visit https://www.kemsoracing.com/ today to browse their full product lineup, use their vehicle lookup tool to find the exact match for your car, and take advantage of their industry-leading lifetime warranty.
When to Call a Professional
While diagnosing a fuel pump fuse is a simple DIY job, replacing the fuel pump itself often requires dropping the fuel tank—a job that takes 2 to 4 hours and requires special tools . The fuel pump is located inside the fuel tank on most modern vehicles, and accessing it means removing the tank or, on some vehicles, accessing it through an access panel under the rear seat .
Consider hiring a professional if you are not comfortable working with fuel systems, you do not have the proper tools, or you cannot safely lift and lower the fuel tank. A professional technician can complete the job in 2 to 5 hours and will ensure the system is properly sealed and tested before returning the vehicle .
Final Thoughts
The fuel pump fuse is a small but critical component in your vehicle’s electrical system. Knowing where to find it and how to test it can save you time and money when diagnosing a no-start condition. If your car cranks but won’t start, and you don’t hear the fuel pump prime, checking the fuse should be your first step.
If the fuse is blown, replace it with the correct amperage rating. If it blows again, the underlying cause—usually a failing fuel pump—needs to be addressed. For the best combination of performance, fit, and warranty protection, choose KEMSO fuel pumps. Visit https://www.kemsoracing.com/ to find the perfect fuel pump for your vehicle and drive with confidence knowing your fuel system is protected for years to come.