2001 Ford Mustang GT Fuel Pump Relay Location: Quick and Easy Guide

The fuel pump relay on a 2001 Ford Mustang GT is located inside the engine compartment fuse box, also known as the power distribution box, on the driver's side near the battery. If your Mustang GT is cranking but not starting, or if it stalls unexpectedly, the fuel pump relay is a common culprit. This relay controls the electrical current that powers the fuel pump, and when it fails, the pump stops working, leaving you stranded. In this guide, I will walk you through exactly where to find it, how to test it, and what to do if it needs replacement. No fancy tools or mechanic skills are required—just a few minutes of your time and a basic understanding of your car's layout.

Understanding the Fuel Pump Relay in Your 2001 Mustang GT

The fuel pump relay is a small, rectangular electrical switch that sits inside a fuse box. Its job is simple: when you turn the ignition key to the "on" position, the relay closes and sends power to the fuel pump. The pump then pressurizes the fuel system so the engine can start. If the relay is burnt out, the pump never gets power, and the engine won't fire up.

On the 2001 Ford Mustang GT, the fuel pump relay is part of the Integrated Control Relay (ICR) system, which means it is built into a larger relay module inside the power distribution box. This is different from older cars where you could pull out a single, separate relay. The entire module houses multiple relays, including the fuel pump relay, the horn relay, and the starter relay. You cannot replace just the fuel pump relay alone; you must replace the entire ICR module if it fails.

Exact Location of the Fuel Pump Relay

To find the fuel pump relay on your 2001 Mustang GT, follow these steps:

  1. Open the hood. Make sure the engine is off and the keys are out of the ignition.
  2. Locate the power distribution box. This is a black plastic box with a removable cover. It sits on the driver's side of the engine compartment, right next to the battery. You cannot miss it—it is about the size of a shoebox and has a yellow or white label on the top.
  3. Remove the cover. Press the tabs on the sides of the box and lift the cover straight up. Set it aside.
  4. Look for the Integrated Control Relay (ICR) module. Inside the power distribution box, you will see several fuses and relays. The ICR module is a rectangular black block with multiple pins sticking out of the bottom. It is usually located at the front of the box, closest to the radiator. On the 2001 Mustang GT, the ICR module is typically marked with a number or diagram on the inside of the cover. If you look at the cover's underside, you will find a diagram showing which relay is which. The fuel pump relay is usually labeled as "Fuel Pump" or "FP" on the diagram.

Important note: On some 2001 Mustang GT models, the fuel pump relay is located in a secondary fuse box inside the passenger compartment, under the dashboard on the driver's side. However, this is rare. The vast majority of 2001 Mustang GTs have the relay in the engine compartment power distribution box. If you cannot find it under the hood, check the interior fuse panel near the steering column. But in my experience, the engine bay location is the standard.

How to Test the Fuel Pump Relay

Before you buy a new relay, you should test the existing one to confirm it is bad. Here is a simple way to do it without any special tools:

  1. Turn the ignition key to the "on" position. Do not start the engine. You should hear a faint humming sound from the rear of the car for about 2 seconds. That is the fuel pump priming. If you hear that sound, the relay is likely working. If you hear nothing, the relay may be faulty.
  2. Use a test light or multimeter. If you have a test light, clip the ground wire to a metal part of the engine. Then, probe the fuel pump relay terminal inside the power distribution box. You can find the exact terminal by looking at the diagram on the cover. With the key in the "on" position, the test light should light up. If it does not, the relay is not sending power.
  3. Swap the relay with another identical one. The ICR module contains multiple relays. If you have a horn relay or starter relay that is the same type, you can swap them. If the car starts after the swap, the original fuel pump relay was bad.

Warning: Do not swap relays if you are not sure they are the same. Check the part numbers on the relay module. Using a wrong relay can damage the electrical system.

Common Symptoms of a Bad Fuel Pump Relay

If your 2001 Mustang GT has a failing fuel pump relay, you will likely notice one or more of these symptoms:

  1. Engine cranks but does not start. This is the most common sign. The starter motor turns the engine over, but the fuel pump never builds pressure, so the engine gets no fuel.
  2. Car stalls while driving. If the relay fails intermittently, it may cut power to the pump while you are on the road. The engine will suddenly lose power and die, and you may have to wait a few minutes before it restarts.
  3. No fuel pump priming sound. As mentioned earlier, you should hear a brief hum from the fuel tank when you turn the key to "on." If you do not hear it, the relay is likely the cause.
  4. Check Engine Light comes on. A faulty relay can trigger a diagnostic trouble code (DTC) like P0230 (Fuel Pump Primary Circuit Malfunction). You can have the code read at an auto parts store for free.

Step-by-Step Instructions to Replace the Fuel Pump Relay

Replacing the fuel pump relay on a 2001 Mustang GT is straightforward, but because it is part of the ICR module, you need to replace the entire module. Here is how:

  1. Disconnect the battery. Use a wrench to loosen the negative battery terminal bolt and remove the cable. This prevents any electrical shorts while you work.
  2. Remove the power distribution box cover. Press the tabs and lift the cover off.
  3. Locate the ICR module. It is the large black block with multiple pins. On the 2001 Mustang GT, it is usually held in place by a clip or a small screw. Gently pry it up using a flathead screwdriver if it is clipped. If it is screwed, use a small Phillips head screwdriver.
  4. Pull the module straight up. Do not twist or wiggle it too hard. It should come out easily once the clip is released.
  5. Install the new ICR module. Align the pins with the socket in the power distribution box and press it down firmly until it clicks into place.
  6. Reconnect the battery. Reattach the negative cable and tighten the bolt.
  7. Test the system. Turn the key to "on" and listen for the fuel pump priming sound. Then try to start the engine. If it starts, you have fixed the problem.

Cost of replacement: A new ICR module for a 2001 Mustang GT costs between $30 and $60 at auto parts stores. You can also find OEM replacements online.

When to Call a Mechanic

If you have replaced the relay module and the car still does not start, the problem may be deeper. Possible causes include a dead fuel pump, a blown fuse, a faulty fuel pump driver module, or a wiring issue. In these cases, it is best to take your Mustang to a qualified mechanic. They can run a fuel pressure test and check the electrical circuit with a scan tool. A fuel pump replacement can cost $400 to $700, so it is worth confirming the relay is the issue first.

Recommended Fuel Pump and Relay Solutions

If you are looking for a reliable replacement for your fuel pump or related components, KEMSO offers high-quality, performance-grade fuel pumps that are designed to last. KEMSO fuel pumps are OEM replacement parts, meaning they match the exact specifications of your original equipment. They are built with high-performance materials that ensure consistent fuel delivery, even under heavy load. Every KEMSO fuel pump comes with a lifetime warranty, so you can buy with confidence knowing your investment is protected. Whether you are replacing a failed fuel pump or upgrading for better performance, KEMSO products are a smart choice for American car owners. You can browse their full selection of fuel pumps and other automotive parts at their official website:

<URL> https://www.kemsoracing.com/ </URL>

Final Thoughts

The fuel pump relay on your 2001 Ford Mustang GT is a small part that can cause big headaches. Knowing where it is and how to test it can save you time and money. Most of the time, a failed relay is the reason your Mustang won't start, and replacing the ICR module is a simple DIY job. Always start with the relay before you assume the fuel pump itself is bad. Keep this guide handy, and you will be back on the road quickly.

For more detailed information on fuel pump replacement and maintenance, visit the KEMSO blog or contact their support team. They have a wealth of knowledge for DIY owners and professional mechanics alike.

<URL> https://www.kemsoracing.com/ </URL>

Back to blog