How to Jump Fuel Pump Relay on a Chevy Truck in 5 Easy Steps

If you own a Chevy truck, you might have encountered a situation where your fuel pump relay fails and your engine won’t start.

This can be very frustrating, especially if you’re in a hurry or stranded on the road.

Fortunately, there is a way to bypass the fuel pump relay and get your truck running again.

In this article, we’ll show you how to jump fuel pump relay on a Chevy truck in 5 easy steps.

A picture showing the place where the fuel pump is located[photo courtesy: Drill and Driver]
Jumping fuel pump relay on a Chevy truck is not a difficult task if you have some basic tools and knowledge.[photo courtesy: Drill and Driver]

What is a fuel pump relay and why does it fail?

A fuel pump relay is a small device that acts as a switch for the fuel pump.

It receives a signal from the ignition switch when you turn the key, and then sends power to the fuel pump to start the engine. The fuel pump relay is located in the engine bay area, next to the fuse box or the battery terminals.

A fuel pump relay can fail for various reasons, such as:

  • corrosion
  • overheating
  • wear
  • tear

When this happens, the fuel pump won’t receive power and the engine won’t start.

You might hear a clicking sound from the relay, but no sound from the fuel pump.

How to jump fuel pump relay on a Chevy truck

To jump fuel pump relay on a Chevy truck, you’ll need some tools and materials, such as:

  • A ratchet
  • An open-ended wrench
  • Extension cables
  • A new fuel pump relay
  • A copper wire cable with both ends stripped of insulation (optional)

Here are the steps to follow:

  1. Locate the fuel pump relay in your engine bay area. It should be labeled with its location and have four pins on one side and five pins on the other.
  2. Disconnect the battery terminals using the ratchet and the wrench. This will prevent any sparks or short circuits when you jump the relay.
  3. Connect the jumper cables to the battery terminals. Use the red cable for the positive terminal and the black cable for the negative terminal.
  4. Connect the other ends of the jumper cables to the fuel pump relay pins. You’ll need to find the pins that correspond to the power source and the fuel pump. You can use a wiring diagram or a test light to identify them. Alternatively, you can use a copper wire cable to connect them directly. The pins are usually numbered from 1 to 5, and you’ll need to connect pin 1 (power source) to pin 5 (fuel pump).
  5. Turn on the engine and check if it starts. If it does, you’ve successfully jumped the fuel pump relay. If not, you might have a different problem with your fuel system or your ignition system.

How to replace the fuel pump relay

Jumping the fuel pump relay is only a temporary fix to get your truck running again.

You’ll need to replace the faulty relay with a new one as soon as possible.

To do this, simply disconnect the jumper cables or the copper wire cable from the relay pins, and then remove the old relay from its socket.

Then, insert the new relay into the socket and make sure it clicks into place. Reconnect the battery terminals and start your engine normally.

What controls the fuel pump relay?

The fuel pump relay is controlled by two main components:

The ignition switch is the device that you use to turn on and off your truck’s engine.

When you turn the key to the ON position, it sends a signal to the ECM, which then activates the fuel pump relay.

The ECM is the computer that monitors and regulates various aspects of your truck’s engine performance, such as fuel injection, ignition timing, and emissions.

The ECM also monitors the fuel pressure with a sensor and can deactivate the fuel pump relay if it detects a problem.


Jumping fuel pump relay on a Chevy truck is not a difficult task if you have some basic tools and knowledge.

However, it’s not a permanent solution and you should replace the bad relay with a new one as soon as you can.

This will ensure that your fuel system works properly and your engine runs smoothly.

We hope this article was helpful and informative for you.

If you have any questions or comments, feel free to leave them below. And if you liked this article, please share it with your friends who might find it useful as well!

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