2002 Mitsubishi Galant Fuel Pump Relay: Location, Testing, and Replacement Guide
The bottom line: The fuel pump relay on a 2002 Mitsubishi Galant is a small but critical component that controls power to the fuel pump. If your Galant cranks but won't start, or if it stalls unexpectedly, a bad fuel pump relay is one of the most likely causes. This relay is typically located inside the dashboard on the driver's side, behind a small access panel near the door opening. You can test it yourself with a multimeter in about 10 minutes, and replacing it is a simple plug-and-play job that costs less than $20. Before you go through the trouble of replacing the fuel pump itself, always check the relay first.
What Is the Fuel Pump Relay and Why Does It Matter?
The fuel pump relay is an electrical switch that controls power to the fuel pump. When you turn the ignition key to the "ON" position, the relay closes and sends battery voltage to the fuel pump for about two to three seconds to prime the fuel system. When you crank the engine, the relay provides constant power to keep the pump running. Without a working relay, the fuel pump gets no power, no fuel reaches the engine, and your car won't start.
The 2002 Mitsubishi Galant uses two fuel pump relays, not just one. This is a common point of confusion for owners. Your vehicle has fuel pump relay #1 and fuel pump relay #2, and both work together to control the pump. If either one fails, the fuel pump may not run properly, or it may run intermittently.
Where Is the Fuel Pump Relay Located on a 2002 Mitsubishi Galant?
The fuel pump relay is located inside the passenger compartment, not under the hood. Here is the exact location:
Step 1: Open the driver's side front door.
Step 2: Look at the side of the dashboard, near the door hinge area. You will see a small plastic panel that says "Fuse Access." This panel is about 4 inches wide and 6 inches tall.
Step 3: Pull the panel off. It snaps into place with plastic clips, so you may need to use a trim removal tool or a flathead screwdriver wrapped in tape to pry it off gently.
Step 4: Behind this panel, you will see a row of relays. There are five relays in total. Three of them are in a vertical line, and two smaller ones are along the bottom.
Step 5: The fuel pump relays are the two smaller ones on the bottom row. The one on the far left is fuel pump relay #1, and the one in the middle of the bottom row is fuel pump relay #2 .
Some sources also mention that the fuel pump relay can be found in the engine compartment fuse box . However, the more reliable and commonly reported location for the 2002 Galant is behind the driver's side dash panel. If you have trouble locating it there, you can also check the engine compartment fuse box, as relay locations can vary slightly depending on the trim level and production date.
How to Test the Fuel Pump Relay
Before you buy a new relay, you should test the existing one. This only takes a few minutes and can save you money if the relay is still good.
Tools you need:
- A digital multimeter (set to measure resistance or continuity)
- A small flathead screwdriver
- A wire or a small jumper wire
Step 1: Locate the relay. Remove the fuse access panel on the driver's side dash as described above. Identify the two fuel pump relays (bottom row, far left and middle).
Step 2: Remove the relay. Grasp the relay firmly and pull it straight out. It should come out with moderate force. If it is stuck, use a small flathead screwdriver to gently pry it up.
Step 3: Inspect the relay visually. Look for any signs of corrosion, melting, or damage on the plastic housing or the metal pins. If the relay looks burned or cracked, replace it immediately.
Step 4: Test for continuity. Set your multimeter to the continuity setting (or resistance setting, 200 ohms range). Touch the multimeter probes to the two pins that control the coil. On a standard 4-pin relay, the coil pins are usually pins 85 and 86. You should hear a beep or see a very low resistance reading (typically 50 to 120 ohms). If you get no reading, the coil is open and the relay is bad.
Step 5: Test the switch function. Apply 12 volts to the coil pins (85 and 86) using a battery or a power supply. You should hear an audible click. With the coil energized, check continuity between the switch pins (usually pins 30 and 87). You should get a beep or a very low resistance reading. If you do not get continuity, the relay switch contacts are worn out and the relay needs to be replaced.
Step 6: Test the circuit. If the relay tests good, the problem may be in the wiring or the fuel pump itself. With the relay installed, you can check for voltage at the fuel pump connector. Have someone turn the key to the "ON" position while you probe the harness connector at the fuel pump (located under the rear seat, near the fuel tank). You should see 12 volts for two to three seconds when the key is turned on, and then constant 12 volts while cranking. If you see no voltage, the problem is likely in the relay circuit or the wiring upstream .
Common Symptoms of a Bad Fuel Pump Relay
If you are experiencing any of these issues, the fuel pump relay should be one of the first things you check:
1. Engine cranks but won't start. This is the most common symptom. You turn the key, the starter engages, the engine turns over, but it never fires up. If you listen closely near the rear of the car, you should hear a faint whirring sound from the fuel pump for two seconds when you turn the key to "ON." If you hear nothing, the relay or the pump itself is likely dead.
2. Intermittent stalling. The engine runs fine for a while, then suddenly shuts off without warning. After a few minutes, it may start again. This is a classic sign of a failing relay that is overheating or losing contact intermittently.
3. Engine starts but runs rough or hesitates. If the relay is making poor contact, the fuel pump may not get full voltage. This results in low fuel pressure, which causes hesitation, sputtering, and poor acceleration, especially under load.
4. No spark or no fuel pressure at the fuel rail. If you have a fuel pressure gauge, you can check the pressure at the Schrader valve on the fuel rail. With the key on, you should see about 38 to 45 psi (depending on the engine). If you see zero pressure, the fuel pump is not running, and the relay is a prime suspect.
5. Clicking noise from the relay. If you hear a rapid clicking sound coming from the driver's side dash area when you turn the key, the relay may be rapidly opening and closing due to a bad solder joint or a weak coil.
How to Replace the Fuel Pump Relay
Replacing the fuel pump relay is one of the easiest repairs you can do on a 2002 Mitsubishi Galant. No special tools are required, and the job takes about five minutes.
Step 1: Buy a replacement relay. Make sure it is the correct one for your vehicle. The OEM part number is 8627A008 . This relay is a standard 4-pin, 12-volt, 20-amp/30-amp relay. It is compatible with many Mitsubishi models from the same era, including the Galant (1999-2011), Eclipse (2000-2012), Endeavor (2004-2011), Lancer (2002-2008), and Outlander (2003-2008) .
Step 2: Remove the fuse access panel on the driver's side dash.
Step 3: Pull out the old relay. Note which relay is which (fuel pump relay #1 is on the far left bottom, relay #2 is in the middle bottom). You can replace both relays at the same time for peace of mind.
Step 4: Insert the new relay. Make sure it snaps into place firmly. The relay should be oriented the same way as the old one, with the pins aligned to the socket.
Step 5: Reinstall the fuse access panel.
Step 6: Test the repair. Turn the key to the "ON" position and listen for the fuel pump priming sound. If you hear it, the repair is successful. Start the engine and confirm it runs smoothly.
Other Things to Check Before Replacing the Fuel Pump
If you have replaced the fuel pump relay and the car still won't start, the problem may be elsewhere. Here are some other common causes of fuel delivery problems on the 2002 Galant:
1. Blown fuel pump fuse. Check the fuse box under the hood and the fuse panel under the dash. The fuel pump fuse is usually a 15-amp or 20-amp fuse. If it is blown, replace it with the same rating. If it blows again immediately, there is a short circuit in the fuel pump wiring or the pump itself is drawing too much current.
2. Clogged fuel filter. The fuel filter should be replaced every 30,000 to 40,000 miles . A clogged filter can cause the same symptoms as a bad relay, including hesitation, stalling, and hard starting.
3. Bad fuel pump. If the relay is good, the fuse is intact, and the fuel filter is clean, the fuel pump itself may be dead. You can test the pump by checking for voltage at the fuel pump connector. If you have 12 volts at the connector while cranking, but the pump does not run, the pump needs to be replaced.
4. Faulty PCM (Powertrain Control Module). The PCM controls the fuel pump relay. If the PCM is not sending the ground signal to the relay, the relay will not close, and the pump will not run. This is a less common failure but can happen, especially if the car has been in a flood or has electrical issues.
5. Wiring problems. Corroded or broken wires between the relay and the fuel pump can cause intermittent or no operation. Check the wiring harness under the rear seat and along the frame rail for damage.
How to Access the Fuel Pump for Testing
If you need to test voltage at the fuel pump itself, you will need to access the pump. Here is a quick guide:
Step 1: Disconnect the negative battery cable.
Step 2: Remove the rear seat cushion. Pull up on the front edge of the seat cushion while pulling the seat stopper out. The cushion will lift off.
Step 3: You will see a metal access cover on the floor pan. Remove the screws holding the cover and lift it off.
Step 4: You will see the top of the fuel pump assembly. Unplug the electrical connector (it is a large, rectangular connector with several wires). Set your multimeter to DC voltage and probe the connector pins while someone turns the key to "ON." You should see 12 volts for two seconds.
Step 5: If you have voltage at the connector but the pump does not run, the pump is bad. If you have no voltage, the problem is in the relay, fuse, or wiring upstream.
A Note About the Fuel Pump Relay Terminal Numbers
A technical service bulletin (TSB) from Mitsubishi, dated June 2002, corrected the fuel pump relay terminal numbers in the service manual . This means that if you are using an older manual or a generic wiring diagram, the pin numbers may be wrong. Always rely on the updated service manual for your specific vehicle. The 2002 Galant uses a standard 4-pin relay, but the assignment of the coil and switch pins can vary between relay manufacturers. The correct pinout for the OEM relay (part number 8627A008) is:
- Pin 30: Battery positive (constant 12V)
- Pin 87: Output to fuel pump
- Pin 85: Ground (from PCM)
- Pin 86: Ignition switch (12V when key is on)
You can verify the pinout by looking at the relay socket. The pins are usually numbered on the relay itself or on the socket.
Where to Buy a Replacement Fuel Pump Relay
If you have determined that the fuel pump relay is bad, you can buy a replacement at any auto parts store. The relay is a common part and is usually in stock. Here are some options:
- Local auto parts stores: AutoZone, O'Reilly, Advance Auto Parts, and NAPA all carry this relay. Bring your old relay with you to compare the pin configuration.
- Online retailers: Amazon, eBay, and RockAuto sell the relay for around $5 to $15.
- Mitsubishi dealership: You can buy the OEM relay (part number 8627A008) from a dealership, but it will cost more, typically $20 to $30.
When to Replace the Fuel Pump Instead of Just the Relay
If you have replaced the fuel pump relay, checked the fuse, tested the wiring, and the car still has fuel delivery problems, the fuel pump itself may be the issue. The fuel pump on a 2002 Galant is located inside the fuel tank. Replacing it is a more involved job that requires dropping the tank or removing the rear seat cushion to access the pump module.
Symptoms that point to a bad fuel pump include:
- No fuel pressure at the fuel rail, even though the relay is clicking.
- The pump runs but makes a loud whining or grinding noise.
- The pump runs intermittently, even with a new relay and good wiring.
- The car has been driven for over 150,000 miles without a fuel pump replacement.
If you need to replace the fuel pump, you will need a fuel pump kit that includes the pump, the strainer, and the gasket. The job takes about one to three hours, depending on your skill level .
Why You Should Buy a KEMSO Fuel Pump for Your 2002 Mitsubishi Galant
If you have determined that the fuel pump itself needs to be replaced, you need a reliable, high-performance replacement that will last. That is where KEMSO comes in.
KEMSO fuel pumps are designed as high-performance OEM replacement units. They are built to meet or exceed the original equipment specifications for your 2002 Mitsubishi Galant. Every KEMSO fuel pump is manufactured with precision components, including a high-quality electric motor, corrosion-resistant materials, and a durable housing that withstands the harsh conditions inside the fuel tank.
What sets KEMSO apart from other aftermarket brands is the lifetime warranty. KEMSO stands behind their products with confidence. If your KEMSO fuel pump ever fails, you get a replacement at no cost. This is a level of protection that you will not find with most other brands.
When you buy a KEMSO fuel pump, you are getting:
- High performance: Consistent fuel pressure and flow rate, ensuring your engine gets the fuel it needs under all driving conditions.
- OEM-style fitment: The pump is designed to drop into the factory fuel pump module without modifications. No cutting, splicing, or adapting required.
- Lifetime warranty: Buy it once and never worry about replacement costs again.
- Rigorous testing: Every pump is tested before leaving the factory to ensure it meets strict quality standards.
Visit the KEMSO website today to find the perfect fuel pump for your 2002 Mitsubishi Galant:
KEMSO offers a wide range of fuel pumps for cars, trucks, motorcycles, ATVs, and watercraft. With their lifetime warranty and competitive pricing, you can be confident that you are getting the best value for your money.
Frequently Asked Questions
Q: Can I use a generic 4-pin relay from an auto parts store?
A: Yes, as long as the relay is rated for 12 volts and 20 amps or higher. The standard 4-pin relay used on most cars will work. However, it is best to buy a relay that is specifically designed for the Mitsubishi Galant to ensure proper fitment and reliability.
Q: Is there a fuel pump reset button on the 2002 Galant?
A: No, there is no fuel pump reset button on the 2002 Mitsubishi Galant . Unlike some Ford and General Motors vehicles, the Galant does not have a manual reset switch. The fuel pump is controlled by the PCM, and any issues require diagnostics and repair, not a simple reset.
Q: What if I replace the relay and the fuel pump still does not run?
A: If you have replaced the relay and the pump still does not receive power, check the fuel pump fuse first. If the fuse is good, test for voltage at the fuel pump connector. If you have voltage at the connector but the pump does not run, the pump is bad. If you have no voltage at the connector, the wiring between the relay and the pump may be damaged, or the PCM may be faulty.
Q: How much does it cost to replace the fuel pump relay?
A: The relay itself costs between $5 and $15. Replacing it takes about five minutes with no special tools. This is a very affordable repair compared to replacing the fuel pump, which can cost $200 to $500 for the part and labor.
Q: Should I replace both fuel pump relays at the same time?
A: It is a good idea to replace both relays at the same time, especially if one has failed. The other relay may be close to failing as well. Since they are inexpensive and easy to replace, changing both gives you peace of mind.
Final Thoughts
The fuel pump relay on a 2002 Mitsubishi Galant is a small, inexpensive part that can cause big problems when it fails. Before you spend money on a tow truck or a mechanic, check the relay yourself. It takes less than 10 minutes to locate, test, and replace.
Remember the location: driver's side dash, behind the "Fuse Access" panel, bottom row. The far left relay is fuel pump relay #1, and the middle relay is fuel pump relay #2 . If you replace both relays and the car still runs poorly, move on to checking the fuel pump fuse, the fuel filter, and the fuel pump itself.
And if you end up needing a new fuel pump, consider KEMSO. Their high-performance OEM replacement pumps come with a lifetime warranty, giving you the best protection for your investment. You can find the right pump for your Galant at: