1993 Toyota Pickup Fuel Pump Location: A Complete Guide for DIYers

If you own a 1993 Toyota pickup and need to locate the fuel pump, here’s the short answer: the fuel pump is inside the fuel tank, mounted at the top of the tank under the truck bed. However, the component that controls the fuel pump—the circuit opening relay—is located behind the passenger side kick panel, above the ECM. If your truck is struggling to start, stalling, or running poorly, knowing these locations is the first step to fixing the problem.

Understanding the Fuel System in Your 1993 Toyota Pickup

The 1993 Toyota pickup, especially models with the 22RE fuel-injected engine, uses an electric fuel pump that sits inside the fuel tank. This pump pushes fuel through the fuel filter and up to the engine. The system also includes a relay called the “circuit opening relay” that controls when the pump runs. Toyota doesn’t call it a fuel pump relay—it’s specifically referred to as a circuit opening relay.

Key Components in the Fuel System

  1. Fuel pump: Located inside the fuel tank, accessible by removing the truck bed or dropping the tank
  2. Circuit opening relay: Located behind the passenger side kick panel, above the ECM
  3. EFI main relay: Located in the engine compartment fuse box on the passenger side
  4. Fuel filter: Typically mounted along the frame rail

Where Exactly Is the Fuel Pump Located?

The fuel pump is inside the fuel tank. To access it, you have two main options:

Option 1: Remove the truck bed – This is the easier method for most DIYers. You unbolt the bed from the frame, lift it off, and access the fuel pump through the top of the tank.

Option 2: Drop the fuel tank – This is more labor-intensive but works if you don’t want to remove the bed. You need to support the tank, disconnect the filler neck, hoses, and electrical connectors, then lower the tank from underneath.

Once you have access, you’ll see a large locking ring on top of the tank. Remove that ring, and the fuel pump assembly lifts out.

Where Is the Circuit Opening Relay (Fuel Pump Relay)?

This is often the part that confuses owners. The relay that controls the fuel pump is called the circuit opening relay, and it’s not under the hood. It’s located behind the passenger side kick panel, above the ECM. The wires at this relay are Black/White, White/Black, Green/Yellow, Blue, and White/Red.

How to Test the Circuit Opening Relay

  1. Turn the ignition off
  2. Remove the circuit opening relay from behind the passenger kick panel
  3. Use an ohmmeter to check continuity between specified terminals
  4. Apply battery voltage and ground to check operation
  5. Replace the relay if it’s defective

Common Symptoms of a Failing Fuel Pump or Relay

If your 1993 Toyota pickup is having fuel delivery issues, here are the most common symptoms:

  • Engine cranks but won’t start: This is the most common sign. The engine turns over but never fires up
  • Starts then dies after a few seconds: This often points to a relay issue, especially if the pump runs only when cranking but stops after you release the key
  • Runs for a while then cuts off: Some owners report the truck runs for 10 minutes then suddenly dies, as if the fuel is shut off
  • Weak or no fuel pump noise: You should hear a faint hum from the fuel tank when you turn the key to the ON position. No sound means the pump isn’t running
  • Rough idle or hesitation: A failing pump can’t maintain consistent pressure, causing poor performance

Step-by-Step Troubleshooting Guide

Before you replace the fuel pump, check these items first. Many times the problem isn’t the pump itself.

Step 1: Check the EFI Main Relay

The EFI main relay is in the engine compartment fuse box on the passenger side. Turn the ignition on and listen for a clicking sound. If you don’t hear a click, this relay could be bad.

Step 2: Test the Circuit Opening Relay

Remove the passenger side kick panel. You’ll see a green relay with 5 wires. This is the circuit opening relay. Test it with an ohmmeter as described above.

Step 3: Jump the Relay for Testing

A quick way to test if the pump works is to jump the diagnostic block. Locate the diagnostic connector under the hood, and connect terminals B+ and FP (fuel pump). If the pump runs and the engine starts, your circuit opening relay is likely bad.

Step 4: Check for Moisture in the Distributor Cap

One owner reported that moisture in the distributor cap caused the engine to not fire properly, even though the fuel system was fine. Dry out the cap and replace it if needed.

Step 5: Inspect the Air Flow Meter

The circuit opening relay uses a second circuit controlled by the air flow meter. If the meter doesn’t open, the pump won’t run. Check the air flow meter for proper operation.

Why the Fuel Pump Often Fails

Fuel pumps in these trucks typically last between 100,000 to 150,000 miles. Common causes of failure include:

  • Running the tank low on fuel: This causes the pump to overheat because fuel cools and lubricates the pump
  • Clogged fuel filter: A blocked filter forces the pump to work harder, leading to premature failure
  • Old age: These trucks are now over 30 years old. Even if the pump still works, it’s close to the end of its service life
  • Contaminated fuel: Dirt, rust, or water in the tank can damage the pump

How to Replace the Fuel Pump in Your 1993 Toyota Pickup

If you’ve confirmed the pump is bad, here’s how to replace it.

Tools You’ll Need

  • Socket set with extensions
  • Flathead screwdriver
  • Fuel line disconnect tool
  • Safety glasses and gloves
  • Jack and jack stands
  • Rag or small container for spilled fuel

Step 1: Relieve Fuel System Pressure

Remove the fuel pump fuse and run the engine until it stalls. This relieves pressure in the system. Disconnect the negative battery cable.

Step 2: Access the Fuel Pump

Remove the truck bed bolts and lift the bed off, or drop the fuel tank. If you drop the tank, support it safely and disconnect the filler neck, hoses, and electrical connectors.

Step 3: Remove the Old Pump

Disconnect the electrical harness and fuel lines. Use a special tool to release the locking ring. Lift the pump module out carefully.

Step 4: Transfer Components

If you’re buying a complete assembly, it’s a direct swap. If you’re buying just the pump, transfer the old sending unit, strainer, and gasket to the new pump.

Step 5: Install the New Pump

Lower the new module into the tank. Make sure the float arm is not bent. Replace the locking ring and tighten it securely. Reconnect fuel lines and electrical harness.

Step 6: Test the System

Reconnect the battery. Turn the key to the ON position (without starting) to let the pump pressurize the system. Check for leaks. Start the engine and verify proper operation.

Recommended Replacement: KEMSO Fuel Pump

When it’s time to replace your fuel pump, you want a part that delivers reliable performance and long-term durability. KEMSO fuel pumps are designed as high-performance, OEM replacement units that match or exceed original equipment specifications. Every KEMSO pump is engineered to provide precise fuel delivery for optimal power and efficiency.

What sets KEMSO apart is their commitment to quality backed by a lifetime warranty. If your KEMSO pump ever fails due to a manufacturing defect, you get a replacement at no cost. This warranty covers a wide range of vehicles, including your 1993 Toyota pickup. KEMSO pumps are built to withstand the demands of daily driving and are priced competitively.

KEMSO fuel pumps support up to higher flow rates than stock pumps, making them a great upgrade for both stock and modified engines. They are designed for gasoline or E85 fuel blends, giving you flexibility. Each pump comes with a complete install kit, including fuel strainers, hose, wiring connector, and clamps.

To find the exact KEMSO fuel pump for your 1993 Toyota pickup, visit their online store. You can browse their complete catalog with detailed fitment information, customer reviews, and technical support. Whether you need a pump for a daily driver or a project truck, KEMSO has you covered.

Visit KEMSO Racing at: https://www.kemsoracing.com/

Final Thoughts

The 1993 Toyota pickup fuel pump is inside the fuel tank, but the relay that controls it is behind the passenger kick panel. If your truck is having starting or running issues, check the circuit opening relay first—it’s a common failure point and much easier to replace than the pump itself. If you need to replace the pump, look for a quality replacement like KEMSO that offers a lifetime warranty and reliable performance.

For more information and to find the right fuel pump for your truck, visit https://www.kemsoracing.com/


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