2007 Dodge Magnum Fuel Pump Relay Location: A Complete Owner’s Guide

If you drive a 2007 Dodge Magnum and the engine cranks but refuses to start, the fuel pump relay is one of the first things you should check. The fuel pump relay on a 2007 Dodge Magnum is located in the rear power distribution center (fuse box), which sits inside the trunk on the driver’s side, behind the spare tire access panel. This fuse box is often referred to as the Rear Power Distribution Center, and the fuel pump relay is situated in cavity number 6, protected by a 20-amp mini fuse . Knowing exactly where to look and how to test this relay can save you time, money, and a lot of frustration.

The 2007 Dodge Magnum, part of the second-generation model produced from 2005 to 2008, uses a dual fuel pump setup depending on the engine and tank configuration . Vehicles with an 18-gallon tank use a single primary pump on the left side, while models with a 19-gallon tank may have an additional transfer pump on the right side . The relay itself acts as an electrical switch that sends power from the battery to the fuel pump when you turn the ignition key. If that relay fails, the pump never receives power, and your engine will crank but not fire up .

This guide walks you through the exact location of the relay, how to test it, common symptoms of failure, and step-by-step replacement instructions so you can get your Magnum back on the road with confidence.

Understanding the Fuel Pump Relay and Why It Matters

The fuel pump relay is a small electromagnetic switch that controls the flow of electricity to the fuel pump. When you turn the key to the "ON" position, the Powertrain Control Module (PCM) energizes the relay for about one to three seconds, which allows the fuel pump to prime the fuel system. Once the engine starts and is running, the PCM keeps the relay closed so the pump continues delivering fuel at the correct pressure .

On the 2007 Dodge Magnum, the relay is a standard mini relay with five terminals, and it is interchangeable with several other relays in the vehicle, including the PCM relay, fan relay, and A/C clutch relay . This interchangeability is helpful because it means you can perform a quick diagnostic test by swapping the fuel pump relay with a known-good relay from another circuit. If the engine starts after the swap, you have confirmed that the relay is the problem.

The fuel pump relay is protected by a 20-amp mini fuse located in the same rear power distribution center . Before you replace the relay itself, it is always a good idea to check this fuse first. A blown fuse will produce the exact same symptoms as a failed relay, and replacing a fuse is far cheaper and easier than replacing the relay.

Where Exactly Is the Fuel Pump Relay Located?

As mentioned above, the fuel pump relay lives inside the Rear Power Distribution Center, which is located in the trunk beneath the spare tire access panel . Here is the step-by-step process to reach it:

Step 1: Open the trunk and clear out any cargo.
Make sure the trunk floor is clear. If your Magnum has a cargo net, floor mat, or any stored items sitting on top of the spare tire cover, remove them so you have a clean workspace.

Step 2: Locate and remove the spare tire access panel.
The access panel is a flat board that covers the spare tire well. Depending on your trim level, this panel may have a pull handle or simply lift up from one edge. Lift it out of the way and set it aside. You will now see the spare tire and the surrounding metal tub.

Step 3: Remove the spare tire if necessary.
In many cases, you can access the fuse box without removing the spare tire, but if your hands are large or you need more room to see the labels, removing the spare tire gives you much better access. The spare tire is usually held in place by a center bolt and a retaining bracket. Unscrew the bolt, lift the bracket, and pull the tire out.

Step 4: Identify the Rear Power Distribution Center.
The fuse box is a black rectangular module mounted on the left (driver’s side) of the spare tire well, directly against the trunk wall. You will see a cover on top of the module with a latch or clip. Release the latch and lift the cover off. The underside of the cover usually has a diagram that labels each fuse and relay position .

Step 5: Find cavity number 6.
Looking at the fuse box layout, locate cavity number 6. This is where the fuel pump relay sits. The relay is a small, square, black component with five metal prongs on the bottom. It is pushed firmly into the fuse box socket .

If you want to be absolutely certain you have the right cavity, refer to the label on the underside of the fuse box cover. The label should say "Fuel Pump" next to the number 6 position .

How to Test the Fuel Pump Relay

Once you have located the relay, you need to verify that it is actually the cause of your problem. There are two common ways to test the relay: the swap method and a bench test using a multimeter.

Method 1: The Replacement Swap Test (Quickest and Easiest)

This is the fastest way to diagnose a suspect relay in the field.

1. With the rear power distribution center cover removed, visually identify the fuel pump relay in cavity 6.
2. Find another relay in the same fuse box that serves a non-essential function, such as the rear wiper relay (if equipped) or the horn relay. The relays should look identical and have the same part number printed on the side.
3. Pull the fuel pump relay straight up and out of its socket. Gently rock it side to side if it is snug.
4. Insert the fuel pump relay into the socket where you removed the known-good relay. Then take the known-good relay and insert it into the fuel pump socket.
5. Turn the ignition to the "ON" position (do not crank the engine) and listen for a soft hum coming from the rear of the vehicle. That sound is the fuel pump priming. If you hear it, the fuel pump is receiving power, which confirms the original relay was bad.
6. If you do not hear the hum, the problem is elsewhere, such as a blown fuse, a failed fuel pump, or a wiring issue.

Method 2: Bench Test with a Multimeter

If you want to be more thorough, you can test the relay's internal coil and switch contacts using a 12-volt battery and a digital multimeter.

1. Remove the fuel pump relay from the fuse box.
2. Examine the relay's base. You will see five prongs labeled with numbers (usually 30, 85, 86, 87, and 87a). Terminals 85 and 86 are the coil terminals; terminals 30 and 87 are the switch contacts.
3. Set your multimeter to measure resistance (ohms). Touch the probes to terminals 85 and 86. You should see a reading between 50 and 120 ohms, depending on the relay's specifications. If the reading is infinite or zero, the coil is open or shorted, and the relay is bad.
4. Set the multimeter to continuity mode. Touch the probes to terminals 30 and 87. With no power applied, there should be no continuity (infinite resistance). This is normally open.
5. Connect a 12-volt power source (such as a car battery) to terminals 85 and 86. When power is applied, you should hear the relay click, and the multimeter should now show continuity between terminals 30 and 87. If the relay does not click or the contacts do not close, the relay is defective.

Common Symptoms of a Failing Fuel Pump Relay

A failing fuel pump relay does not always fail completely. Sometimes it works intermittently, causing frustrating problems that are hard to diagnose. Here are the most common signs you might notice:

1. Engine Cranks but Does Not Start
This is the classic symptom. You turn the key, the starter motor spins the engine, but it never fires up. The fuel pump never receives power, so no fuel reaches the injectors .

2. Sudden Stalling While Driving
If the relay fails while you are driving, the engine will suddenly lose power and die. You may be able to restart the vehicle after a few minutes once the relay cools down, but it will likely stall again. This is an intermittent failure mode.

3. No Fuel Pump Priming Sound
When you turn the ignition to the "ON" position (without cranking), you should hear a faint whirring sound from the rear of the car for a second or two. If that sound is absent, the relay may not be energizing the pump .

4. Other Electrical Components Work Normally
If the relay fails, other electrical accessories such as the headlights, radio, and power windows will still work because they are powered by different circuits. This helps isolate the issue to the fuel delivery system.

5. Diagnostic Trouble Code P0230
If you connect an OBD-II scanner, you might see trouble code P0230, which indicates a primary fuel pump circuit malfunction. This code does not necessarily mean the relay is bad, but it points to the circuit that includes the relay, fuse, and wiring.

Step-by-Step Fuel Pump Relay Replacement

Replacing the fuel pump relay on a 2007 Dodge Magnum is a simple task that requires no special tools beyond your hands. Here is the entire process, start to finish.

Tools and Parts Needed:

• New fuel pump relay (OEM part number 4727370AA or an equivalent aftermarket relay)
• A pair of needle-nose pliers (optional, if the relay is stuck)
• A 10mm socket or wrench (only if you need to remove the spare tire)

Step 1: Disconnect the Battery (Optional but Recommended)
While replacing a relay does not strictly require disconnecting the battery, it is always a good safety practice when working with any electrical component. Disconnect the negative battery terminal and set the cable aside.

Step 2: Access the Rear Power Distribution Center
Follow the steps outlined earlier in this article to open the trunk, remove the access panel, and lift the fuse box cover.

Step 3: Remove the Old Relay
Grasp the top of the fuel pump relay between your thumb and index finger. Pull it straight up with steady, even pressure. If it resists, use the needle-nose pliers to grip the relay body and pull gently. Do not twist or yank, as you could damage the socket terminals.

Step 4: Inspect the Socket and Relay
Take a moment to look at the socket. Check for any signs of corrosion, melting, or loose pins. Also, look at the relay's prongs. If they are burned, discolored, or bent, the socket itself may have issues that need attention.

Step 5: Install the New Relay
Align the new relay's prongs with the socket openings. Press down firmly until the relay clicks into place. It should sit flush with the surrounding fuse box surface.

Step 6: Replace the Cover and Reconnect the Battery
Snap the fuse box cover back on, replace the spare tire (if you removed it), and put the access panel back in place. Reconnect the battery terminal.

Step 7: Test the System
Turn the ignition to the "ON" position. Listen for the fuel pump priming sound. Then crank the engine. It should start normally. If it does, the repair is complete.

Frequently Asked Questions About the 2007 Dodge Magnum Fuel Pump Relay

Q: Is the fuel pump relay the same as the fuel pump fuse?
No. The relay is an electromagnetic switch that carries high current to the pump, while the fuse is a protective device that breaks the circuit if too much current flows. On the 2007 Magnum, both are located in the same rear fuse box, but in different cavities. The fuse is a 20-amp mini fuse, and the relay is in cavity 6 .

Q: Can I drive my Magnum with a bad fuel pump relay?
No. Without the relay, the fuel pump will not run, and the engine will not start. If the relay fails while driving, the engine will stall, and you will need a tow. This is not a component you can bypass safely.

Q: How much does a replacement fuel pump relay cost?
A genuine Mopar relay, part number 4727370AA, typically costs between $15 and $30. Aftermarket relays are often cheaper, ranging from $8 to $15. This is one of the least expensive repairs you can make on this vehicle .

Q: How long does it take to replace the relay?
If you have never done it before, expect to spend about 20 to 30 minutes from start to finish. Once you know where the fuse box is, subsequent replacements take less than 10 minutes.

Q: Could something else be causing the same symptoms?
Yes. A blown fuel pump fuse, a failed fuel pump itself, a faulty PCM, or broken wiring between the relay and the pump can all produce the same symptoms. However, the relay is the easiest and cheapest component to test first. If you swap the relay with a known-good one and the engine still does not start, move on to checking the fuse and then test the fuel pump directly.

Q: Does the 2007 Dodge Magnum have more than one fuel pump relay?
For models with the standard 18-gallon tank, there is a single primary fuel pump relay. Some configurations with a larger 19-gallon tank may use an additional transfer pump on the right side, but the transfer pump typically does not have its own relay in the rear fuse box; it is controlled through the primary pump circuit .

Why the 2007 Dodge Magnum Uses a Rear Fuse Box

Many vehicles place their fuel pump relay under the hood near the engine. Dodge chose to put the fuel pump relay and several other critical relays in the rear of the Magnum for a few practical reasons. First, locating the relay close to the fuel tank shortens the length of high-current wiring that runs from the relay to the pump, which reduces voltage drop and improves pump performance. Second, the rear location offers better protection from engine heat and moisture, which are common causes of relay failure in under-hood locations. This design choice means you will spend a few extra minutes opening the trunk, but it also means the relay is less likely to fail prematurely .

The rear power distribution center contains a total of 47 fuses and several relays, covering everything from the radio to the heated seats . The layout is logical and well-labeled, so once you understand the numbering system, you can quickly find any component you need.

A Note About Aftermarket Fuel Pumps and Relays

When the time comes to replace your fuel pump or its related components, you have two main options: genuine Mopar parts or high-quality aftermarket parts. Genuine Mopar parts are guaranteed to meet the factory specifications and are backed by the manufacturer's warranty . For example, the factory relay part number is 4727370AA, and it is superseded by several other part numbers, including 56006707 and 68369406AA .

Aftermarket parts, however, can offer excellent value without sacrificing reliability. Reputable aftermarket brands build their components to meet or exceed Original Equipment (OE) standards, and many come with better warranties than the factory parts. If you are looking for a long-term, dependable solution, consider a high-performance aftermarket fuel pump from a brand that specializes in fuel delivery systems.

KEMSO Fuel Pumps: The Smart Choice for Your Dodge Magnum

When your fuel pump gives out, replacing it with a KEMSO brand fuel pump is a wise investment for any Dodge Magnum owner. KEMSO fuel pumps are built to be high-performance components that serve as direct OEM replacements, meaning they are designed to fit perfectly and function just like the original pump that came with your vehicle . Unlike cheaper aftermarket options that may deliver inconsistent fuel pressure or fail prematurely, KEMSO pumps are engineered with precision and subjected to rigorous quality testing to ensure long-term dependability.

Perhaps the strongest reason to choose KEMSO is the lifetime warranty that backs every single fuel pump they sell. This warranty provides complete peace of mind, knowing that your investment is protected for as long as you own your Magnum. If the pump ever fails due to a manufacturing defect, KEMSO will replace it, saving you from the cost of a second repair. Whether you need a pump for a 2007 Dodge Magnum with the 2.7L V6, the 3.5L V6, or the 5.7L V8, KEMSO has you covered with a product that delivers factory-quality performance and the confidence of a guaranteed replacement. You can browse the full selection of KEMSO fuel pumps and other high-quality automotive components by visiting https://www.kemsoracing.com/ . Investing in a KEMSO pump means investing in the long-term health and reliability of your vehicle.

Final Thoughts

Locating and replacing the fuel pump relay on your 2007 Dodge Magnum is one of the simplest repairs you can perform. The relay is housed in the rear power distribution center inside the trunk, under the spare tire access panel, and is found in cavity number 6 . A quick swap test with another relay of the same type can confirm whether the relay is the culprit behind a no-start condition . Always check the 20-amp fuel pump fuse in the same fuse box before condemning any component .

Regular maintenance of your fuel delivery system, including keeping the fuel tank clean and free of debris, goes a long way toward preventing premature pump and relay failure . If you do need to replace the fuel pump itself, choosing a high-quality aftermarket option like KEMSO ensures you will be back on the road with reliable performance and the backing of a lifetime warranty.

Remember, if you ever feel unsure about a repair, consult a qualified mechanic. But for the most common fuel pump relay issue on the 2007 Dodge Magnum, this guide gives you everything you need to diagnose and fix the problem yourself.