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How To Jump Fuel Pump Relay On Chevy Truck?

Discussion topic: how to jump fuel pump relay on chevy truck

If you’re a Chevy truck owner in need of a solution for jumping your fuel pump relay, you’ve come to the right place! In this article, we’ll provide a step-by-step guide on how to jump fuel pump relay on chevy truck” while prioritizing your safety.

If you find yourself in a difficult situation with a Chevy truck that is having trouble starting due to a faulty fuel pump relay, knowing how to jump can be a lifesaver. This particular process may seem daunting at first, but with the right information and instructions, you can easily get your truck running in no time. Jumping the fuel pump relay on a Chevy truck can be a difficult task, but with a little know-how you can be an expert in no time. So, let’s discuss all there is to know about how to jump the fuel pump relay on a Chevy truck.

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What is a fuel pump relay?

The fuel pump relay is an essential component of a vehicle, playing a crucial role in its startup. This relay controls the current flow throughout the electrical system of your Chevy truck, dictating the functionality of various systems such as the ignition, lights, and safety features like anti-lock brakes. If the fuel pump relay detects any anomalies, it can regulate or halt the flow of electricity entirely.

During the shutdown process, the fuel pump relay deactivates briefly to switch off the pump.

Typically housed in a black box, the fuel pump relay is an electrical component present in all cars with internal combustion engines. It is commonly located alongside the fuse box.

How To Jump Fuel Pump Relay On Chevy Truck: 6 Step

By following this simple instruction, you will effectively activate the fuel pump relay within a period ranging from 30 to 60 minutes.

1/ Locate the relay

Located in the engine bay, the relay can be found near the fuse box in most Chevy models. Prior to starting, ensure that the car is parked on a flat surface. The relay is housed in a black plastic box, clearly labeled for easy identification. Take a moment to inspect it before proceeding.

2/ Disconnecting the battery

Before working with electricity, it is crucial to disconnect the battery. Start by removing at least the black, negative cable, and if desired, both cables can be removed for added safety.

3/ Use jumper cables

To ensure a successful connection, follow these steps:

  • Connect the red jumper cable to the red battery end.
  • Similarly, connect the black jumper cable to the black battery end.
  • Remember to avoid any contact between the cables and any metal objects.
  • Next, connect the two pins with the ends of the copper wire.
  • Locate the pins in the upper left and lower end corners of the relay center.
  • Connect the pins with the wires.

4/ Time to start the engine

Before operating the vehicle, it is important to allow it to run for approximately 15 seconds after starting. Once all components have been reconnected as they were prior to starting, turn off the engine.

5/ Disconnect and Reconnect

To ensure the longevity and optimal performance of your vehicle, it is crucial to follow the proper procedure for jumping the fuel pump relay on your Chevy Truck. Here are the steps to perform this task effectively and safely:

  • Start your engine.
  • Carefully disconnect the jumper wires from the fuel pump relay. Leaving them connected can potentially cause damage to other components of your truck’s electrical system.
  • Once the jumper wires are disconnected, proceed to reconnect the actual fuel pump relay.
  • Verify that all connections are secure.
  • Your Chevy Truck should now be ready to hit the road with a smoothly running engine.

By adhering to these steps and exercising caution, you can easily and successfully complete the process of jumping the fuel pump relay on your Chevy Truck.

6/ Check the fuel gauge

After turning off the vehicle, check the fuel gauge to see the progression of colors. The fuel gauge will display red, followed by yellow, and finally green. If the fuel gauge shows green immediately, it indicates that something was not done correctly.

For a step-by-step explanation, you can watch a helpful video that simplifies this process and makes it easy to follow.

Tools to Replace Your Fuel Pump Relay

To learn how to bypass the fuel pump relay on a Chevy truck, you’ll need the following tools:

  • Ratchet set
  • Open-ended wrench
  • Extension cables
  • Replacement fuel pump relay

If you need any of these tools, feel free to visit our parts department.

How to Bypass the Fuel Pump Relay

How To Jump Fuel Pump Relay On Chevy Truck (2)

To effectively jump the fuel pump relay without jumper cables, follow these steps:

Find the Relay: Park your car on flat ground, open the hood, and locate the fuel pump relay. Typically, it can be found near the fuse box or battery terminals. Consult your owner’s manual for precise details.

Disconnect the Terminals: Carefully disconnect the battery terminals. While removing the black negative cable is necessary, you may remove both if desired.

Connect Copper Wire: Disconnect the 4-pin pump from the center of the relay. Prepare a 5-inch piece of copper wire by stripping half an inch of insulation from both ends. Connect one end to the upper-left pin slot on the pump relay center and the other end to the lower-right pin slot on the relay center.

Start the Engine: Start the engine and allow it to run for 15 seconds. Once done, turn off the ignition switch.

Check the Fuel Gauge: Check the light on the fuel gauge. Keep in mind that it may transition from red to yellow before turning green, so be patient.

These steps will guide you through the process of bypassing the fuel pump relay without the use of jumper cables.

Alternative methods to jump fuel pump relay

If you don’t have jumper cables, there is an alternative method to jump the fuel pump relay that requires some pin work.

First, disconnect the first pin from the center of the relay. Next, get a 5-inch piece of copper wire and remove around half of the insulation from both ends.

Start the engine and, as with the initial method, turn it off after 15 seconds once everything is reconnected. After starting the car again, the fuel gauge should undergo a noticeable color change from red and yellow to green.

Fuel pump relay replacement cost

The cost of replacing a fuel pump relay may vary depending on the vehicle and mechanic. For a Chevy truck, the approximate cost is $100. While the pump relay can be found at a relatively low price, the majority of the cost is due to the mechanic’s labor. To learn more about testing and replacing a fuel pump relay, you can watch this informative video.

4 Signs of a bad fuel pump relay

There are four common signs of a bad fuel pump relay:

How To Jump Fuel Pump Relay On Chevy Truck (1)

Stalling of the engine: If the car suddenly stalls and eventually stops during a ride, it indicates a problem with the fuel pump. In some cases, the car can be restarted and taken to a mechanic. If the car fails to start, then the fuel pump is completely dead.

The engine can’t start: One common symptom of a malfunctioning fuel pump is the inability to start the car. Although the engine may produce a sound when turning the key, it won’t start because the fuel pump isn’t receiving any power. In the case of engine start problems, the fuel pump is often the primary cause, but a detailed check of the car should still be performed.

Loss of power: If there is a sudden loss of power during a car ride, a faulty fuel pump may be the culprit. While a car may continue running for some time with a malfunctioning fuel pump, the lack of power will eventually become apparent. If you notice a significant loss of power, it is recommended to stop and inspect the car or take it to a mechanic.

No humming from the fuel pump: When starting the engine, a fuel pump typically produces a humming sound that can be heard from inside or outside the vehicle, near the oil tank. If the pump isn’t receiving electricity, it won’t start and will remain silent.

Taking note of these signs can help identify issues with the fuel pump and ensure timely maintenance or repairs.

FAQs about How To Jump Fuel Pump Relay On Chevy Truck

Which fuse is for the fuel pump relay?

To locate the fuse box, thoroughly inspect both under the hood and under the dashboard. Start by examining the area under the hood.

Search for a black plastic box situated near the battery. Open the cover of the box to find a diagram depicting the arrangement of relays, fuses, and circuit breakers. Keep an eye out for a small black relay controlling the fuel pump relay.

Next, locate a 10 amp fuse in close proximity, labeled with “fuel”, “fuel pump”, or “f/p”. If no such fuse is found, proceed to check under the dashboard. The markings on the fuse box under the dashboard should be similar to the one under the hood.

What causes a fuel pump relay to malfunction?

The reliability and longevity of a fuel pump relay can be influenced by several factors. Power surges may cause damage, although age is typically the primary concern. A fuel pump relay can endure anywhere between 100,000 and 200,000 miles, which is a considerable amount of ignition key starts.

It is worth noting that a faulty electrical installation can result in the burning out of the relay due to high voltage currents. If you frequently encounter issues with your fuel pump relay, it is advisable to assess the overall electrical installation for potential problems.

Can a car run with a bad fuel pump relay?

If the fuel pump relay is damaged, the extent of the issue will determine the car’s behavior. In case of minor damage, starting the car may require a few attempts, but indications of a faulty relay will be present. These symptoms may include stalling, power loss, and eventual complete failure of the relay.

As a result, the engine will be deprived of fuel, rendering it inoperable. It is crucial to address any signs of a faulty fuel pump relay promptly by seeking assistance from a competent mechanic. This will help prevent unexpected breakdowns on the road and ensure the reliability of your vehicle.

Should I jump the fuel pump relay if it is faulty?

Long-term use of a car with a bypassed fuel pump relay is not advisable. Jumping the relay is a method to assess the electrical setup.

If the pump functions after jumping the relay, it indicates a faulty fuel pump relay. If the pump fails to operate even after jumping, the issue lies within the installation.

In either scenario, both the fuel pump and relay should be inspected. A well-maintained vehicle ensures reliable transportation to your desired destinations.

Timothy Ballard

I’m Timothy Ballard, owner of a used car dealership in Springfield. I love just about everything automotive, but I have a special place in my heart for trucks. I’m an ASE Certified Master Technician, so I know my way around a car. In my spare time, I enjoy traveling with my family and hiking new trails.

1 thought on “How To Jump Fuel Pump Relay On Chevy Truck?”

  1. During emergencies, I have employed this method multiple times without hesitation. If you find yourself stranded, it is a viable option. Generally, the relay serves as a straightforward switch that utilizes a low current circuit to activate a higher current circuit responsible for powering your fuel pump. By bridging your high circuit, your fuel pump will operate continuously. Although this solution is not ideal, it will enable you to reach your destination or a suitable location to address the underlying issue appropriately.


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