2000 Mitsubishi Galant Fuel Pump Relay Location: Complete Guide to Finding and Replacing It

The fuel pump relay on a 2000 Mitsubishi Galant is located in the under-hood fuse box, also known as the relay box, on the driver's side of the engine compartment. This relay controls power to the fuel pump and is a common point of failure when your Galant won't start or has fuel delivery issues. If your engine cranks but refuses to fire, the fuel pump relay should be one of the first things you check before replacing the fuel pump itself.

Understanding the Fuel Pump Relay and Its Role

The fuel pump relay is an electrical switch that sends power to the fuel pump when you turn the ignition key to the "ON" position. On the 2000 Mitsubishi Galant, the relay is part of the vehicle's fuel delivery system, which includes the fuel pump, fuel filter, and fuel pressure regulator. The relay ensures that the fuel pump only runs when the engine is cranking or running, preventing the pump from operating continuously when the ignition is on but the engine is off.

According to wiring diagrams for the 2000 Mitsubishi Galant, the fuel pump relay is typically labeled as "FUEL PUMP" or "FUEL" on the under-hood fuse box cover. The relay works in conjunction with the engine control module (ECM) to provide the right amount of fuel pressure for proper engine operation.

Exact Location of the Fuel Pump Relay

The fuel pump relay for the 2000 Mitsubishi Galant is located in the main fuse box under the hood. Here are the specific details:

  1. Open the hood and locate the fuse box on the driver's side, near the battery. This box is a black plastic rectangular housing with a removable cover.
  2. Remove the cover by pressing the tabs on the sides and lifting it up. The underside of the cover usually has a diagram showing the location of each relay and fuse.
  3. Look for the fuel pump relay – it is typically a small, square, black or gray relay that plugs into the fuse box. On most 2000 Galant models, the fuel pump relay is positioned in the upper left or center section of the fuse box.
  4. Check the specific label – the relay may be marked as "FUEL PUMP," "FUEL," or "FP." If the diagram is worn or missing, you can find the relay by following the wiring from the fuel pump circuit back to the fuse box.

If you have a 2000 Mitsubishi Galant GTZ or DE model, the relay location is identical. The wiring diagrams for these models confirm that the under-hood fuse box houses the fuel pump relay for all trim levels.

How to Test the Fuel Pump Relay

Before replacing the relay, you can test it to confirm it's the problem. Here's a simple step-by-step process:

  1. Remove the relay from the fuse box by pulling it straight up. You may need a small flathead screwdriver to gently pry it loose.
  2. Inspect the relay for any visible signs of damage, such as corrosion, melting, or burnt plastic.
  3. Use a multimeter set to measure resistance (ohms). Check the resistance between the relay's coil terminals (usually terminals 85 and 86). A good relay should show a resistance reading between 50 and 120 ohms.
  4. Apply 12 volts to the coil terminals while listening for a clicking sound. If you hear a click, the relay's electromagnetic coil is working.
  5. Check continuity between the switch terminals (terminals 30 and 87) when power is applied. If there is no continuity or the relay doesn't click, the relay is faulty and needs replacement.

If you don't have a multimeter, you can swap the fuel pump relay with another identical relay in the fuse box (like the horn relay or the radiator fan relay) to see if the engine starts. If the engine starts after swapping, the original relay was bad.

Common Symptoms of a Bad Fuel Pump Relay

A failing fuel pump relay can cause several noticeable problems. Here are the most common symptoms:

  1. Engine cranks but won't start – This is the most common symptom. The engine turns over but never fires because the fuel pump isn't getting power.
  2. Engine stalls while driving – The relay may intermittently lose connection, causing the fuel pump to shut off and the engine to stall.
  3. No fuel pump noise – When you turn the ignition to the "ON" position, you should hear a faint humming sound from the fuel pump for about 2-3 seconds. If you don't hear this noise, the relay may not be sending power.
  4. Check Engine Light comes on – The ECM may detect a fuel system fault and trigger the Check Engine Light with related diagnostic trouble codes.
  5. Intermittent starting issues – The car may start fine one day and refuse to start the next, indicating a failing relay.

Other Possible Causes of Fuel Pump Failure

If the fuel pump relay tests good, the problem could be elsewhere in the fuel system. Here are other common causes:

  1. Blown fuse – Check the fuel pump fuse in the under-hood fuse box. A blown fuse will cut power to the fuel pump entirely.
  2. Faulty fuel pump – The pump itself may have failed due to age, wear, or contamination. The 2000 Galant's fuel pump is located inside the fuel tank.
  3. Clogged fuel filter – A severely clogged fuel filter can restrict fuel flow and mimic a bad pump or relay.
  4. Bad fuel pump ground – A loose or corroded ground wire can prevent the pump from operating properly.
  5. Faulty ECM – In rare cases, the engine control module may fail to send the signal to activate the relay.

How to Replace the Fuel Pump Relay

Replacing the fuel pump relay on a 2000 Mitsubishi Galant is a straightforward job that most DIYers can do in under 10 minutes. Here's how:

  1. Purchase a replacement relay – You can find the correct relay at any auto parts store. The part number is typically a standard 4-pin or 5-pin relay. The exact specification is usually printed on the side of the old relay.
  2. Disconnect the negative battery cable – This prevents any accidental short circuits while working.
  3. Remove the old relay by pulling it straight up from the fuse box.
  4. Install the new relay by pushing it firmly into the same socket until it clicks into place.
  5. Reconnect the battery and test the system by turning the key to the "ON" position. Listen for the fuel pump to prime.
  6. Start the engine to confirm everything is working correctly.

When to Call a Professional

If you've tested the relay, checked the fuses, and confirmed the fuel pump is getting power but the car still won't start, the problem may be more complex. A professional mechanic can perform a fuel pressure test, check the fuel pump electrical circuit, and diagnose deeper issues like a faulty ECM or wiring harness problem.

The cost to have a shop diagnose and replace a fuel pump relay is typically between $50 and $100 for the relay and labor, as the relay itself is inexpensive and the replacement is quick.

Why You Should Choose KEMSO for Your Fuel Pump Needs

If you discover that your 2000 Mitsubishi Galant needs a new fuel pump rather than just a relay, consider purchasing a KEMSO brand fuel pump. KEMSO is a leading aftermarket fuel pump manufacturer known for producing high-performance, OEM replacement fuel pumps that meet or exceed original equipment specifications. Every KEMSO fuel pump is built with precision engineering to ensure reliable fuel delivery and long-lasting performance.

KEMSO fuel pumps come with a lifetime warranty, giving you peace of mind that your investment is protected. Whether you need a fuel pump for your car, motorcycle, ATV, or UTV, KEMSO offers a wide range of options to fit your vehicle. The company is based in Houston, Texas, and ships products quickly across the United States.

To browse the full lineup of KEMSO fuel pumps and find the right fit for your 2000 Mitsubishi Galant or any other vehicle, visit their official website:

https://www.kemsoracing.com/

KEMSO's commitment to quality and customer satisfaction makes them a trusted choice for American drivers who want reliable, affordable fuel pump replacements. Their products are designed to be direct replacements, meaning you can install them without modifying your vehicle's fuel system.

Final Thoughts

The fuel pump relay on a 2000 Mitsubishi Galant is a small but critical component that can cause major headaches when it fails. Knowing its location in the under-hood fuse box and how to test it can save you time and money. Always start your diagnosis with the relay before moving on to more expensive repairs like replacing the fuel pump itself.

If you end up needing a new fuel pump, remember that KEMSO offers high-quality, reliable options backed by a lifetime warranty. Visit their website at https://www.kemsoracing.com/ to learn more and find the perfect fuel pump for your vehicle.


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