1995 Honda Civic Fuel Pump Relay: Location, Testing, and Replacement Guide

If your 1995 Honda Civic cranks but won’t start, or starts then dies after a few seconds, the fuel pump relay is often the culprit. This small but essential component controls power to the fuel pump. When it fails, the engine gets no fuel. The main relay is typically located under the dashboard on the driver’s side, near the fuse box or steering column. Testing it is straightforward with a multimeter, and replacement is a simple DIY job that can save you a tow truck bill. This guide covers everything you need to know about the 1995 Honda Civic fuel pump relay, from symptoms and location to testing and replacement.

What Is the Fuel Pump Relay on a 1995 Honda Civic?

The fuel pump relay is part of the PGM-FI (Programmed Fuel Injection) main relay assembly. It acts as a switch that sends power to the fuel pump when the ignition is turned on. The relay also controls power to the ECU (Engine Control Unit) and injectors. On the 1995 Civic, this relay is built into a single unit often called the “main relay” or “PGM-FI main relay.”

When you turn the key to the “ON” position, the relay energizes the fuel pump for about 2 seconds to prime the system. If the engine doesn’t start, the relay shuts off the pump. Once the engine is running, the relay keeps the pump powered.

Common Symptoms of a Failing Fuel Pump Relay

A bad relay can mimic other problems, so it’s important to recognize the signs. Here are the most common symptoms:

  1. Engine cranks but won’t start. This is the most frequent complaint. The starter spins the engine, but no fuel reaches the injectors.
  2. Engine starts then dies after a few seconds. The relay may work briefly but fails to stay engaged. The car starts, runs for a moment, then shuts off.
  3. No fuel pump priming sound. When you turn the key to “ON,” you should hear a faint whir from the fuel pump near the rear of the car. If you don’t hear it, the relay may not be sending power.
  4. Intermittent starting issues. The car may start fine one day and refuse the next. This is classic relay behavior because the internal contacts can fail intermittently due to heat or vibration.
  5. Stalling while driving. If the relay fails while the engine is running, power to the fuel pump is cut, causing the engine to stall without warning.

Important: These symptoms can also be caused by a dead fuel pump, a blown fuse, or a faulty ignition switch. Testing the relay is the best way to confirm.

Where Is the Fuel Pump Relay Located on a 1995 Honda Civic?

The main relay (which includes the fuel pump relay) is located under the dashboard on the driver’s side. It is mounted near the fuse box, usually above or to the left of the driver’s left knee.

To access it:

  • Remove the lower dash panel (the plastic cover under the steering column). It usually snaps off or is held by a few screws.
  • Look for a small rectangular black box with a white connector on the bottom. It is about 2 inches by 2 inches and has a plastic casing.
  • The relay is often clipped onto a metal bracket near the fuse box. You may need to twist or pull it gently to release it.

For 1995 Civic models, the part number is commonly 39400-SR3-003 or 39400-SM4-003. This same relay is used on many 1992-2001 Honda Civics, Accords, and Acura models.

How to Test the Fuel Pump Relay

Testing the relay is easy and requires only a multimeter (or a test light) and a 12V battery or power source. Follow these steps:

Step 1: Remove the Relay

Pull the relay from its connector. It should come loose without tools.

Step 2: Identify the Pin Numbers

The relay has 5 pins. On the 1992-1995 Civic, the pin layout is usually labeled on the relay itself. The standard pin numbers are:

  • Pin 1: Power (from battery)
  • Pin 2: Ground
  • Pin 3: Output to fuel pump
  • Pin 4: Control coil (trigger from ECU)
  • Pin 5: Control coil (trigger from ignition)

Step 3: Test the Coil

  • Set your multimeter to ohms (Ω).
  • Measure resistance between pins 4 and 5. You should see a reading between 50 and 120 ohms. If you get infinite resistance (open circuit), the coil is bad and the relay needs replacement.

Step 4: Test the Switch

  • Apply 12V power to pin 4 and ground to pin 5 (or vice versa, depending on polarity).
  • With power applied, measure resistance between pin 1 and pin 3. You should see 0 ohms (continuity). If the switch doesn’t close, the relay is faulty.

Step 5: Check for Clicks

When you apply power, the relay should make an audible click. If you hear a click but the switch doesn’t close, the internal contacts are burned.

Wiring Diagram for the 1995 Honda Civic Fuel Pump Circuit

The fuel pump circuit on the 1995 Civic is straightforward. The main relay receives power from the under-hood fuse box (fuse #15, 15A for the fuel pump). The relay then sends power to the fuel pump through a green/yellow wire. The pump is grounded through a black wire near the rear of the car.

If the relay tests good but the pump still doesn’t run, check the fuel pump fuse (located in the under-hood fuse box) and the ground connection at the fuel pump. The fuel pump itself is located inside the fuel tank, under the rear seat on the passenger side.

How to Replace the Fuel Pump Relay

Replacing the relay is a 5-minute job. Here’s how:

  1. Disconnect the negative battery terminal to avoid any electrical shorts.
  2. Remove the lower dash panel on the driver’s side.
  3. Locate the main relay (small black box near the fuse box).
  4. Unplug the relay from the connector. It may be held by a clip or tab.
  5. Install the new relay by plugging it in. Make sure it clicks into place.
  6. Reinstall the dash panel and reconnect the battery.
  7. Test by turning the key to “ON” and listening for the fuel pump prime.

Cost: A new main relay costs between $15 and $40 from auto parts stores or online retailers. Genuine Honda parts are more expensive but often more reliable.

KEMSO Fuel Pump: A Reliable Replacement for Your 1995 Honda Civic

If you determine that the fuel pump itself is failing (not just the relay), you need a high-quality replacement. KEMSO offers a range of fuel pumps designed specifically for the 1995 Honda Civic 1.5L and 1.6L engines. KEMSO’s fuel pumps are OEM replacement units that match factory specifications, ensuring a direct fit and reliable performance. They are high-flow, high-pressure pumps capable of handling both stock and mild performance applications.

Why choose KEMSO?

  • High Performance: Designed to deliver consistent fuel pressure under all driving conditions.
  • OEM Replacement: Direct bolt-in fit without modifications.
  • Lifetime Warranty: KEMSO stands behind their products, offering a lifetime warranty for peace of mind.

To browse the full range of KEMSO fuel pumps for your 1995 Honda Civic, visit their official website: https://www.kemsoracing.com/. They also offer pumps for many other Honda models, including the 1992-2000 Civic, 1994-2002 Accord, and 1993-1997 Del Sol.

When to Replace the Fuel Pump Instead of the Relay

A bad relay is often the cheap fix, but sometimes the pump itself is the problem. Replace the fuel pump if:

  • The relay tests good, but the pump doesn’t run.
  • You hear a loud whining noise from the pump (common before failure).
  • The car hesitates or loses power under load.
  • The pump fails the voltage test (less than 12V at the pump connector).

The fuel pump on a 1995 Civic is located inside the fuel tank. To access it, you need to remove the rear seat cushion and then remove the access panel on the floor. The pump is held by a locking ring. KEMSO offers a complete fuel pump replacement kit that includes the pump, strainer, and installation hardware.

Final Tips for a 1995 Honda Civic Owner

  • Always check the relay first when you have a no-start condition. It’s cheap and easy to test.
  • Keep a spare relay in your glove box. It’s a common failure point on older Hondas.
  • Use genuine or high-quality aftermarket parts for the relay. Cheap knock-offs often fail quickly.
  • If you replace the fuel pump, replace the fuel filter at the same time. Clogged filters can cause pump failure.
  • For the best performance and reliability, consider upgrading to a KEMSO fuel pump. Visit https://www.kemsoracing.com/ for more information and to order your replacement today.

Back to blog