2002 Ford Mustang Fuel Pump Fuse Location: Complete Guide to Finding and Fixing It

The bottom line: The fuel pump fuse on a 2002 Ford Mustang is located in the power distribution box under the hood, not inside the passenger cabin. It is a 20-amp mini fuse, labeled as fuse number 14 in the engine compartment fuse box. If your Mustang cranks but won't start, checking this fuse should be one of the first things you do before diving into more complex fuel system diagnostics. However, the fuel system on these cars involves several other components that can also cause a no-start condition, so knowing the full picture is important.

Where Is the Fuel Pump Fuse on a 2002 Ford Mustang?

The 2002 Ford Mustang has two fuse boxes. The passenger compartment fuse panel is located under the dashboard on the driver's side, but the fuse you need for the fuel pump is in the engine compartment fuse box, also called the power distribution box. This box is mounted near the battery, on the driver's side fender apron, close to the firewall.

According to the owner's manual and multiple fuse box diagrams, the fuel pump fuse is a 20-amp mini fuse. It is labeled as fuse number 14 in the power distribution box. The fuse is a yellow mini-atc 20A fuse.

The fuse numbering diagram is embossed on the underside of the power distribution box cover. When you remove the cover, you will see a diagram that shows the location of each fuse. Look for the fuse labeled "Fuel Pump" or simply fuse number 14.

How to Check the Fuel Pump Fuse

Checking a fuse is straightforward and requires only a few minutes and basic tools. Here is a step-by-step process:

Step 1: Locate the power distribution box. Open the hood of your 2002 Mustang. The fuse box is a black rectangular box located near the battery on the driver's side. It may have a cover that snaps off.

Step 2: Remove the cover. Press the tabs on the sides of the cover and lift it off. Set it aside where you won't lose it.

Step 3: Find the fuel pump fuse. Look at the diagram on the underside of the cover or in your owner's manual. Identify the fuse labeled for the fuel pump. It is fuse number 14, a 20-amp mini fuse.

Step 4: Visually inspect the fuse. A good fuse has a continuous metal strip visible through the clear plastic top. A blown fuse will have a broken or melted metal strip, often with a gap in the middle. The plastic may also look discolored or charred.

Step 5: Use a multimeter for certainty. If the fuse looks intact but you are not sure, use a multimeter to test for continuity. Set the meter to the continuity or resistance mode. Touch one probe to each of the two small metal prongs on top of the fuse. If you hear a beep or see a reading near zero ohms, the fuse is good. If the meter shows "OL" (open loop) or no beep, the fuse is blown.

Step 6: Replace if necessary. If the fuse is blown, replace it with a new 20-amp mini fuse. Never use a fuse with a higher amperage rating, as this can cause wire damage or start a fire. Always keep spare fuses in your vehicle for quick replacements.

What to Do If the Fuse Blows Again

If you replace the fuel pump fuse and it blows again immediately or shortly after, you have a deeper electrical problem. A single blown fuse can happen due to age or a power surge, but repeated failures indicate a short circuit or a failing component. Common causes of a repeatedly blown fuel pump fuse include:

1. A failing fuel pump. As the fuel pump wears out, it can draw more current than normal, causing the fuse to blow. This is one of the most common reasons for a repeated fuse failure.

2. Damaged wiring. The wiring harness that runs to the fuel pump may be chafed, pinched, or corroded. This can create a short to ground, which will blow the fuse.

3. A faulty fuel pump relay. The fuel pump relay is located in the Constant Control Relay Module (CCRM) in the right front fenderwell. A bad relay can cause electrical issues that blow the fuse.

Other Components in the Fuel Pump Power System

The fuel pump fuse is just one part of a larger electrical system that powers the fuel pump. Knowing the other components can help you diagnose the problem more accurately.

Fuel Pump Relay (CCRM): The fuel pump relay is located in a module called the Constant Control Relay Module (CCRM). The CCRM is located in the right front fenderwell. It is not actually located in the engine compartment itself, but the connector and mounting nuts are visible from the engine compartment.

Inertial Fuel Shutoff Switch: This switch is located in the trunk on the driver's side. It is a safety device that interrupts power to the fuel pump in the case of a high-G-force incident such as a collision. The switch has a red reset button. If you have been in an accident or hit a large pothole, this switch may have tripped. Press the red button to reset it.

Fuel Pump Driver Module (FPDM): The FPDM is also located in the trunk area. This module controls the power to the fuel pump based on many variables including the current fuel pressure and the fuel pressure desired by the PCM. If the FPDM fails, the fuel pump will not receive power even if the fuse is good.

How the Fuel Pump Power System Works

Understanding the flow of power can help you diagnose problems. Here is how the system works on a 2002 Ford Mustang:

  1. When you turn the key to RUN or START, 12V is applied to activate the fuel pump relay.
  2. The fuel pump relay is fed by 12V through the fuel pump fuse (fuse number 14, 20A).
  3. Power flows from the fuel pump relay to the inertial fuel shutoff switch in the trunk.
  4. After the inertial fuel shutoff switch, power flows to the Fuel Pump Driver Module (FPDM).
  5. The FPDM powers the fuel pump based on signals from the PCM.

If any of these components fail, the fuel pump will not receive power. Start with the fuse, then check the inertial switch, and then move on to the relay and FPDM.

Common Symptoms of a Blown Fuel Pump Fuse

If the fuel pump fuse is blown, you will likely experience one or more of these symptoms:

  • The engine cranks but will not start
  • The engine starts and then dies shortly after
  • The engine stalls while driving
  • No fuel pressure at the fuel rail (you can check this by pressing the Schrader valve on the fuel rail with a rag over your hand)
  • The fuel pump does not make a humming sound when you turn the key to the ON position

Wiring Diagram and Component Locations

The wiring diagram for the 2002 Mustang fuel pump system reveals the general setup of the fuel pump power system. The key components are:

  • Fuel pump fuse: Fuse number 14, 20A mini fuse, in the power distribution box under the hood
  • Fuel pump relay: Located in the CCRM in the right front fenderwell
  • Inertial fuel shutoff switch: Located in the trunk on the driver's side
  • Fuel Pump Driver Module (FPDM): Located in the trunk area

The connector references (e.g., C433) and component designations (e.g., A195a/9D372) are the actual Ford designations.

What About the Passenger Compartment Fuse Panel?

Some people mistakenly look for the fuel pump fuse in the passenger compartment fuse panel. The passenger compartment fuse panel is located below and to the left of the steering wheel by the brake pedal. However, the fuel pump fuse is NOT located there. The passenger compartment fuse panel does have a fuse for "Engine Controls" (fuse number 2, 20 amps), but this is not the dedicated fuel pump fuse.

Different Fuse Box Layouts

Note that different sources sometimes label the fuse differently. Most diagrams show the fuel pump fuse as fuse number 14 in the power distribution box, rated at 20 amps. The variation in numbering comes from different fuse box layouts. The safest approach is to open the power distribution box cover and look for the label. The cover usually has a diagram printed on it, or you can find the label molded into the plastic. Look for "FUEL PUMP," "FP," or simply a 20-amp fuse that is dedicated to the fuel system.

Troubleshooting Steps in Order

If your 2002 Mustang cranks but won't start, follow these steps in order:

1. Check the fuel pump fuse. This is the easiest and fastest thing to check. Look for fuse number 14 in the power distribution box under the hood.

2. Check the inertial fuel shutoff switch. This switch is in the trunk on the driver's side. Press the red reset button to make sure it hasn't tripped.

3. Listen for the fuel pump. Turn the key to the ON position (but don't start the engine). You should hear the fuel pump hum for a few seconds. If you don't hear anything, the fuel pump is not getting power.

4. Check for fuel pressure. With a rag over your hand, push the fuel rail Schrader valve pin in. If fuel sprays out, you have pressure. If nothing comes out, the fuel pump is not working.

5. Test the fuel pump relay. The fuel pump relay is in the CCRM in the right front fenderwell. You can swap it with a similar relay (like the horn relay) to test it.

6. Test the fuel pump driver module. The FPDM is in the trunk. If the fuse is good, the relay is working, and the inertial switch is reset, but the fuel pump still doesn't run, the FPDM may be faulty.

Why You Shouldn't Ignore a Blown Fuel Pump Fuse

A blown fuel pump fuse is a warning sign that something is wrong. If you simply replace the fuse and it blows again, you have an underlying issue that needs to be addressed. Ignoring this can lead to more serious problems, such as:

  • A fire hazard from damaged wiring that is shorting out
  • Being stranded when the car stalls and won't restart
  • Damage to the PCM or other electrical components
  • A completely dead fuel pump that leaves you stranded

Always take the time to diagnose the root cause of a blown fuse, not just replace it and hope for the best.

Maintaining Your Fuel System

Regular maintenance of your fuel system can help prevent problems with the fuel pump and related components. Here are some tips:

  • Keep your gas tank at least a quarter full to prevent the fuel pump from overheating
  • Use quality fuel from reputable stations
  • Replace your fuel filter every 30,000 miles to prevent debris from damaging the pump
  • Listen for unusual noises from the fuel pump area
  • If you notice any signs of fuel pump trouble, address them quickly

Final Thoughts

The 2002 Ford Mustang fuel pump fuse is located in the power distribution box under the hood, and it is fuse number 14, a 20-amp mini fuse. Checking this fuse should be one of the first steps in diagnosing a no-start condition or fuel pump failure. However, if the fuse is good and the pump still doesn't work, you need to move on to checking the inertial fuel shutoff switch, the fuel pump relay, and the fuel pump driver module.

If you determine that the fuel pump itself is faulty and needs to be replaced, you need a high-quality replacement that will last. For a reliable upgrade, consider a high-performance fuel pump that offers OEM replacement quality and is backed by a strong warranty.

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What sets KEMSO apart is their commitment to quality and customer satisfaction. Every KEMSO fuel pump comes with a Lifetime Warranty, so you can install it with confidence knowing that your investment is protected for as long as you own your vehicle. Whether you are restoring a classic Mustang or keeping your daily driver on the road, KEMSO has the right fuel pump for your needs.

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