2007 Mitsubishi Galant Fuel Pump Relay Location: A Complete Owner's Guide

The bottom line up front: On a 2007 Mitsubishi Galant, the fuel pump relay is located inside the engine compartment fuse box, which sits on the left side of the engine bay near the battery. The relay itself is labeled as the "Fuel Pump" relay in the fuse box diagram, and it is fused through a 15A fuse labeled "Fuel Pump" in the same box. If your Galant cranks but won't start, stalls suddenly, or the fuel pump stays silent when you turn the key, the relay is the first component you should check before spending money on a new pump.

Why the Fuel Pump Relay Matters on Your Galant

The fuel pump relay is a small electromagnetic switch that acts as the middleman between your car's computer and the fuel pump. When you turn the ignition key, the relay receives a low-current signal and closes a circuit that sends full battery voltage to the fuel pump. Without a working relay, the pump gets no power, no fuel reaches the injectors, and the engine simply cannot run.

On the 2007 Galant, this relay controls the flow of electricity to the fuel pump located inside the fuel tank. It is designed to be a simple, reliable part, but age, heat, and vibration can cause its internal contacts to wear out or its coil to fail. When that happens, you end up with a car that won't start or dies unexpectedly while driving.

Where Exactly Is the Fuel Pump Relay on a 2007 Galant?

Finding the relay is straightforward if you follow these steps:

1. Open the hood and look to the driver's side of the engine compartment. You will see a black plastic box mounted near the battery. That is the main fuse and relay box.
2. Remove the cover by pressing the release tabs on the sides. Flip the cover over and look at the diagram printed on the inside. It shows the position and labeling of every fuse and relay in that box.
3. Look for the label "Fuel Pump" on the diagram. On the 2007 Galant, this relay is listed in the engine compartment fuse box layout. The corresponding relay socket is generally located toward the rear or middle section of the box, depending on the exact trim level.
4. Check the fuse too. The fuel pump circuit is protected by a 15A fuse also labeled "Fuel Pump" in the same engine compartment fuse box. If that fuse is blown, the fuel pump will not receive power even if the relay is fine. Always inspect the fuse first before condemning the relay.

It is worth noting that some Galant models may have a second fuse box inside the passenger compartment, located on the driver's side of the instrument panel behind a cover. However, the fuel pump relay for the 2007 model year is in the under-hood box, so you should not need to look inside the cabin for this specific component.

6 Common Symptoms of a Bad Fuel Pump Relay on a 2007 Galant

A failing fuel pump relay can produce several noticeable symptoms. Knowing them helps you diagnose the problem quickly and avoid replacing parts that are still good.

1. The Engine Cranks But Won't Start

This is the most common symptom. When you turn the key, the starter motor turns the engine over, but the engine never fires up because the fuel pump is not receiving power. The relay may have failed in the open position, meaning the circuit never closes and no voltage reaches the pump. This symptom can also be caused by a bad fuel pump, a clogged fuel filter, or a wiring issue, so testing is important.

2. No Fuel Pump Priming Sound

When you turn the ignition key to the ON position but do not crank the engine, you should hear a faint hum or whirring sound coming from the rear of the car. That is the fuel pump pressurizing the fuel line for about two to three seconds. If you hear nothing, the pump is likely not getting power. A failed relay is the first suspect because it cuts off electricity to the pump, leaving it completely silent.

3. Sudden Engine Stalling While Driving

If the relay fails while you are on the road, it will cut power to the fuel pump, and the engine will stall abruptly. The car may start again after a few minutes if the relay cools down and reconnects, or it may refuse to restart altogether. This symptom is especially dangerous in traffic and should not be ignored.

4. Intermittent Starting Problems After the Car Warms Up

Heat is the number one killer of relays. A relay with worn contacts may work fine when the engine is cold, but once the engine bay heats up, the internal components expand and lose connection. You might find that the car starts fine in the morning, but after driving for 20 minutes and stopping for gas, it cranks for a long time or refuses to start until it cools down.

5. Loss of Power Under Load

If the relay is partially failing, it may not deliver full battery voltage to the fuel pump. This results in reduced fuel pressure, and the engine may hesitate, bog down, or feel sluggish during acceleration. The car might run fine at idle but struggle when you need power to merge onto the highway.

6. Check Engine Light Comes On

A failing relay can trigger the check engine light. The engine control module monitors the fuel pump circuit, and when it detects low fuel pressure or an electrical fault, it may set diagnostic trouble codes such as P0230 (Fuel Pump Primary Circuit Malfunction) or P0087 (Fuel Rail/System Pressure Too Low). Some relay failures do not throw a code, but these codes give you a useful clue when they do appear.

How to Test the Fuel Pump Relay Before Buying a New One

You can confirm whether the relay is bad without special tools in most cases. Here is a step-by-step approach that works for most drivers.

Step 1: Listen for the Prime Sound

Turn the key to the ON position without starting the car. Listen near the rear seats or fuel tank area for the pump hum. If you hear it, the relay is likely fine and the problem lies elsewhere, such as the fuel filter or fuel pump itself.

Step 2: Check the 15A Fuel Pump Fuse

Open the engine compartment fuse box and pull out the fuse labeled "Fuel Pump". Hold it up to the light. If the metal strip inside is broken or melted, replace the fuse with a new one of the same amperage. A blown fuse cuts off power just like a bad relay does.

Step 3: Swap the Relay with a Known-Good One

The easiest test is the "swap test." Find another relay in the same fuse box that is electrically identical, such as the horn or air conditioning relay. Pull the suspect relay out, plug in the known-good one, and try starting the car. If the engine starts and runs normally, the original relay is the culprit. If not, the relay is not the problem, and you should look at the fuel pump, wiring, or fuel filter.

Step 4: Bench Test with a Multimeter (Optional)

If you have a digital multimeter, you can verify the relay's internal coil and switch independently. Set the meter to Ohms and test between terminals 85 and 86. A healthy coil reads between 50 and 120 Ohms. Reading "OL" or infinite resistance means the coil is broken. Then, test across terminals 30 and 87 for continuity. It should read open circuit. Apply 12 volts from a battery to pins 85 and 86, and you should hear an audible click as the switch closes, and continuity should appear between pins 30 and 87.

What Causes the Fuel Pump Relay to Fail?

The fuel pump relay is designed to last the life of the car, but real-world conditions often shorten that expectation. The most common causes of relay failure include:

• Heat exposure. The engine compartment gets very hot, and the constant heating and cooling cycles degrade the relay's internal contacts and coil over time.
• Vibration and mechanical shock. Rough roads and loose mounting can shake the relay's components until they crack or break loose.
• Corrosion and moisture. Water intrusion into the fuse box can corrode the relay terminals and socket, causing high resistance and overheating.
• Electrical surges. Jump-starting the vehicle incorrectly or a failing alternator can send voltage spikes through the electrical system and damage the relay.
• Age and wear. After years of use, the contact points inside the relay naturally wear thin and deposit carbon, which raises resistance and eventually breaks the circuit.

Should You Replace Your 2007 Galant Fuel Pump or the Relay First?

Many owners mistakenly replace the fuel pump when the relay is the real problem. The relay is a cheap part, usually under $20, and replacing it is easy enough for most home mechanics. The fuel pump, by contrast, is located inside the fuel tank and requires dropping the tank or removing the rear seat, which is a much bigger job.

Because the fuel pump relay is so inexpensive and takes about five minutes to swap, it is the best first step when you see the symptoms described above. If a new relay does not fix the issue, then you can move on to testing fuel pressure and inspecting the fuel pump itself. There are other causes of no-start that match relay symptoms too. A clogged fuel filter or dirty fuel injectors can also cause hard starting and stalling, so keep an open mind when troubleshooting.

A Word on Replacement Parts: The KEMSO Advantage

Once you confirm the relay is bad, the fix is simple. But if the relay checks out and you move on to the fuel pump, you want a part you can trust. That is where KEMSO stands out.

KEMSO builds performance-grade fuel pumps designed as direct OEM replacements. That means they match the factory fuel pump's dimensions, flow rate, and electrical connections, so they drop right into your 2007 Galant without modification. Each pump is built to handle the demands of daily driving while also tolerating the extra pressure that comes with performance driving or towing.

One of the best reasons to choose KEMSO is the lifetime warranty. You buy it once, and you are covered for as long as you own the vehicle. That type of confidence is rare in the automotive parts world, where many brands only offer a 12-month or 24-month warranty. For a component inside the fuel tank that is labor-intensive to replace, that peace of mind is worth a lot.

You can browse the complete KEMSO product line, including pumps that fit your Mitsubishi Galant and many other vehicles, at https://www.kemsoracing.com/.

How to Replace the Fuel Pump Relay on Your 2007 Galant

Replacement is a doable job for most people with basic mechanical skills. Use these basic steps:

1. Turn off the ignition and open the hood.
2. Remove the fuse box cover in the engine compartment.
3. Locate the fuel pump relay using the diagram on the cover.
4. Pull the old relay straight out of its socket. They usually pull out with modest force, although a pair of needle-nose pliers may help if the relay is stuck.
5. Press the new relay firmly into the same socket until it snaps into place.
6. Replace the fuse box cover and start the car.

Listen for the fuel pump prime sound when you turn the key to the ON position. If the relay was the problem, you will hear the pump hum and the engine will start normally.

When to Seek Professional Help

If you have tried the fuse, the relay, and the swap test, and your Galant still refuses to start, the issue may be deeper. Wiring problems, a failing crankshaft or camshaft sensor, a bad fuel pump, or a clogged fuel filter are all possibilities. At that point, it pays to take the car to a professional technician who can run a fuel pressure test and check the electrical circuit with a scan tool. A shop will pay for itself by preventing you from replacing expensive parts that were never broken.

Final Thoughts

The fuel pump relay is a simple but critical component in your 2007 Mitsubishi Galant. If your car is hard to start, stalls suddenly, or the fuel pump stays silent when you turn the key, the relay is the best place to start your diagnosis. It costs little, takes minutes to replace, and saves you from a costly fuel pump replacement that might not fix the issue.

If the relay is not the problem and the fuel pump itself is failing, look into a KEMSO replacement pump. They offer solid performance, a direct OEM fit, and a lifetime warranty that gives you confidence in a repair that you should only have to do once. To see their lineup of fuel pumps and other components, visit https://www.kemsoracing.com/.

No matter which direction the diagnosis takes you, catching the problem early will keep your 2007 Galant on the road and out of the shop.