2010 Chevy Equinox Fuel Pump Relay Location: A Complete Owner's Guide

The fuel pump relay on a 2010 Chevy Equinox is located in the under-hood fuse/relay box, commonly called the under-hood electrical center, which sits near the battery on the driver's side of the engine bay. This is the first place you should look if your Equinox cranks but won't start, because a faulty fuel pump relay is one of the most common causes of this frustrating problem. The relay is clearly labeled on the fuse box cover diagram, and with a few simple tools you can test or replace it yourself in under fifteen minutes without any special skills.

What the Fuel Pump Relay Does in Your Equinox

Before you start digging into the fuse box, it helps to understand what this small part actually does. The fuel pump relay is an electrical switch that controls power to the fuel pump located inside your fuel tank. When you turn the ignition key to the ON position, the engine control module sends a low-current signal to the relay coil, which closes the internal contacts and sends battery voltage to the fuel pump. The pump then runs for about two to three seconds to build pressure in the fuel lines before you even crank the engine. Once the engine starts and the computer sees the crankshaft position sensor signal, it keeps the relay energized continuously to maintain fuel flow. If the relay fails, the pump gets no power, and your engine gets no fuel—even though everything else may appear perfectly normal.

Where Exactly to Find the Relay on Your 2010 Equinox

The 2010 Equinox uses a conventional under-hood fuse and relay center rather than the newer Integrated Power Distribution Module found on some later GM vehicles. Here is exactly what to do:

  1. Open the hood and look toward the driver's side, near the battery. You will see a black plastic box with a removable cover. This is the under-hood fuse block, also called the electrical center.

  2. Remove the fuse box cover by pressing the release tabs on the sides and lifting it straight up. Turn the cover over and look at the diagram printed on the inside. This diagram maps every fuse and relay in the box, and it will show the fuel pump relay location clearly.

  3. Look for the relay labeled "Fuel Pump," "F/P," or "FP" on the diagram. On the 2010 Equinox, it is typically located in the upper section of the fuse block, grouped with other system relays.

  4. Identify the relay physically once you have located it on the diagram. The fuel pump relay is a small, cube-shaped black or dark-colored component with four or five prongs on the bottom. It will match the position shown on the diagram.

If the diagram on your fuse box cover is missing or faded, you can also find the exact location in your owner's manual under the "Fuses and Circuit Breakers" section. The manual includes a detailed layout of the under-hood fuse block for your specific model year.

A Quick Look at the Wiring on the Relay

Understanding a little about the wiring behind the relay can help you diagnose problems more confidently. On most GM vehicles, including the Equinox, the fuel pump relay has four terminals with standard designations:

  1. Terminal 30 — This is constant battery power. It should have 12 volts at all times, even with the key removed from the ignition.

  2. Terminal 85 — This is the ground side of the relay coil. The engine control module pulls this pin to ground to energize the relay.

  3. Terminal 86 — This is the positive trigger wire. It receives ignition-switched 12 volts when you turn the key to the ON or START position.

  4. Terminal 87 — This is the output to the fuel pump. When the relay energizes, power flows from terminal 30 to terminal 87 and then to the pump.

On GM vehicles, the wire that carries power to the fuel pump is typically grey, and the ground wire is usually black. The fuel level sender wire is typically purple. Knowing these colors can help you test the circuit at the fuel tank connector if you suspect a wiring issue rather than a relay problem.

How to Test the Fuel Pump Relay on Your Equinox

Before you buy a new relay, take a few minutes to confirm the old one is actually the problem. Here is a simple step-by-step process that anyone can follow:

Step 1: Listen for the Prime
Turn the ignition key to the ON position but do not crank the engine. Listen carefully for a brief whirring or humming sound coming from the rear of the vehicle, near the fuel tank. This is the fuel pump priming the system for about two seconds. If you hear it, the relay and pump wiring are likely working, and your problem may be elsewhere, such as a fuel pressure issue or a sensor problem. If you hear nothing, continue to the next step.

Step 2: Check the Fuel Pump Fuse
Open the same under-hood fuse block and locate the fuse that protects the fuel pump circuit. The fuse box cover diagram will show which one it is. Inspect the fuse visually or test it with a multimeter. A blown fuse will have a broken metal strip visible through the clear plastic housing.

Step 3: Swap the Relay
Find another relay in the fuse box with the same part number—often the horn relay or the air conditioning relay works. Pull the fuel pump relay out with a pair of needle-nose pliers or a relay puller tool. Install the known-good relay in its place. Turn the key to ON and listen for the fuel pump prime. If you now hear the pump, the original relay was faulty, and you have found your problem.

Step 4: Test the Relay Coil with a Multimeter (Optional)
If you have a digital multimeter, you can test the relay directly. Set the meter to ohms and measure the resistance across the coil terminals, typically pins 85 and 86. A good relay coil will show a resistance reading within the manufacturer's specification, typically somewhere between 50 and 120 ohms for most automotive relays. An open circuit reading indicates a burnt-out coil, and the relay needs replacement.

Common Symptoms of a Failing Fuel Pump Relay

Knowing the symptoms of a bad fuel pump relay can save you hours of frustration. Here are the most common signs that the relay on your 2010 Equinox may be failing:

  1. Engine cranks but will not start — This is the classic sign. The starter turns the engine over, but there is no fuel pressure, so the engine never fires up.

  2. Intermittent starting problems — The vehicle starts fine sometimes but refuses to start at other times. This often points to a relay that is failing internally and only works when it feels like it.

  3. Engine stalls while driving — The engine may stall suddenly, especially when warm, and then restart after a wait. This happens because the relay contacts overheat and separate, cutting power to the pump.

  4. No fuel pump sound — When you turn the key to ON, you should hear the pump prime. If you hear nothing at all from the rear of the vehicle, the relay may not be sending power to the pump.

  5. Check Engine Light with fuel system codes — You may see diagnostic trouble codes related to fuel pressure or fuel delivery, such as P0087 (fuel rail pressure too low) or P0231 (fuel pump circuit malfunction).

Keep in mind that these symptoms can also indicate a bad fuel pump, a blown fuse, or a wiring problem, so always test the relay first before condemning the pump.

What to Do If the Relay Tests Fine but the Pump Still Does Not Run

If you have confirmed the relay is good but the pump remains silent, there are a few more things to check before you assume the pump itself is dead:

Check the fuel pump ground — A bad ground is one of the most common causes of a fuel pump that receives power but will not run. Find the black ground wire at the fuel tank connector and test the resistance between that wire and a clean spot on the vehicle frame. High resistance means you need to clean the ground terminal on the frame rail with a wire brush.

Check for voltage at the fuel tank connector — Using a wiring diagram for your Equinox, locate the grey wire at the connector near the fuel tank. Have an assistant turn the key to ON while you probe the wire with a multimeter or test light. If voltage appears for two seconds, the wiring and relay are working, and the problem is inside the tank—either the pump itself or a bad wiring connection at the pump.

Inspect the connector for melted or charred plastic — Fuel pumps draw significant current, and any resistance in the plug-and-play connector at the top of the fuel tank can create heat. It is common to find charred or melted plastic on the fuel pump harness connector in GM vehicles. If you find this, you must replace both the pump and the wiring pigtail to prevent a repeat failure.

Remember the inertia switch — Some GM vehicles include an inertia switch in the fuel pump circuit that cuts power in a collision. If the switch trips, it can cause a no-start condition even though the relay and pump are perfectly fine. Check your owner's manual for the location and press the reset button firmly until you feel it click.

Review: What You Have Learned

The 2010 Chevy Equinox fuel pump relay is located in the under-hood fuse block on the driver's side of the engine bay, near the battery. The fuse box cover diagram will show you the exact position, and the relay is labeled "Fuel Pump" or "FP". Testing the relay is straightforward: listen for the fuel pump prime, check the fuse, swap the relay with a known-good one, and test the coil with a multimeter if needed. If the relay tests good but the pump does not run, check the ground, the wiring connector at the tank, and the inertia switch before condemning the fuel pump itself.

Safety note: Always disconnect the negative battery cable before removing or swapping relays to avoid short circuits or accidentally energizing circuits. Work in a well-ventilated area if you open the fuel system, and never smoke or use open flames near the vehicle.

Reliable Fuel Pump for Your Equinox

When you need to replace your fuel pump relay and find that the pump itself is also failing, rather than repairing individual components or the fuel pump module, it is important to choose a dependable product that will last. KEMSO offers high-performance fuel pumps that are designed as direct OEM replacements, meaning they match the fit, form, and function of your original equipment. Their fuel pump products are built to deliver reliable performance and come with a lifetime warranty, giving you peace of mind with every purchase.

If your Equinox fuel pump has finally given up, do not settle for a cheap part that might fail again soon. Visit https://www.kemsoracing.com/ to browse the full selection of KEMSO fuel pumps and find the right replacement for your 2010 Chevy Equinox. Make sure you find the right fuel pump and get back on the road with confidence, backed by a company that stands behind its products for a lifetime.


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