12 Volt Fuel Pump Relay Wiring Diagram: A Complete Guide

If you’re looking to install a 12-volt fuel pump relay, you’re in the right place. This article will provide you with a step-by-step guide on how to wire a fuel pump relay. There are many benefits of using a fuel pump relay, including improved fuel efficiency, increased engine performance and better acceleration. So, let’s dive in and learn how to install a 12-volt fuel pump relay.

What is a Fuel Pump Relay?

A fuel pump relay is a device that controls the flow of fuel from the fuel pump to the engine. It is responsible for regulating the amount of fuel that enters the engine, which helps to improve its performance. A fuel pump relay is an excellent way to increase the efficiency of your vehicle’s fuel system and extend the lifespan of the fuel pump.

How Does a Fuel Pump Relay Work?

The fuel pump relay works by controlling the voltage that is sent to the fuel pump. When you turn on your vehicle’s ignition, power is sent to the fuel pump relay. The relay then sends power to the fuel pump, which activates the pump and sends fuel to the engine. Once the engine is running, the fuel pump relay continues to regulate the amount of fuel that is sent to the engine, ensuring that it runs smoothly and efficiently.

Why Install a Fuel Pump Relay?

There are many reasons why you might want to install a fuel pump relay, including:

  • Reduced fuel consumption
  • Improved engine performance
  • Better acceleration
  • Longer lifespan for your fuel pump

What You Need to Install a Fuel Pump Relay?

Before you begin installing a fuel pump relay, you’ll need to gather a few items:

  • 12-volt fuel pump relay
  • Wire strippers/cutters
  • Electrical tape
  • Ring terminals
  • Butt connectors
  • Wire

Step-by-Step Guide to Wiring a Fuel Pump Relay

Step 1: Disconnect the Battery

The first step in wiring a fuel pump relay is to disconnect the battery. This will ensure that you’re working with a safe and stable electrical system.

Step 2: Locate the Fuel Pump Relay

The next step is to locate the fuel pump relay in your vehicle. This can typically be found in the engine compartment or the fuse box. Consult your vehicle’s owner manual if you’re unsure of its location.

Step 3: Remove the Fuel Pump Relay

Once you’ve located the fuel pump relay, you’ll need to remove it from the socket. This can be done by gently pulling on the relay until it pops out.

Step 4: Identify the Wires

The next step is to identify the wires that are connected to the fuel pump relay. There should be four wires in total: two that are connected to the power source and two that are connected to the fuel pump.

Step 5: Strip the Wires

Using your wire strippers, strip the ends of each wire by about ¼ inch. This will allow you to connect them to the appropriate terminals with ease.

Step 6: Connect the Wires to the Relay

Using your electrical tape, connect the wires to the relay in the following manner:

  • Connect one of the power wires to the terminal marked “87”
  • Connect the other power wire to the terminal marked “30”
  • Connect one of the fuel pump wires to the terminal marked “85”
  • Connect the other fuel pump wire to the terminal marked “86”

Step 7: Secure the Connections

Once you’ve connected the wires to the relay, use your butt connectors to secure the connections. This will help to ensure that the connections are strong and won’t come loose over time.

Step 8: Reinstall the Relay

Once the connections are secure, you can reinstall the fuel pump relay. Simply press it back into place in the socket.

Step 9: Reconnect the Battery

The final step is to reconnect the battery. This will allow you to test your new fuel pump relay and ensure that it’s working properly.

FAQs

Q: Can I Install a Fuel Pump Relay Myself?

A: Yes, installing a fuel pump relay is a relatively simple process that can be completed by anyone with basic mechanical skills. However, if you’re unsure about any aspect of the installation process, it’s always best to consult a professional.

Q: What Kind of Fuel Pump Relay Should I Use?

A: There are many different types of fuel pump relays available on the market, each with their own unique features and benefits. Be sure to do your research and choose a relay that is compatible with your vehicle’s make and model.

Q: Will a Fuel Pump Relay Improve My Vehicle’s Fuel Efficiency?

A: Yes, a fuel pump relay can help to improve your vehicle’s fuel efficiency by regulating the amount of fuel that is sent to the engine. This can help to reduce fuel consumption and save you money in the long run.

Conclusion

Installing a 12-volt fuel pump relay is an excellent way to improve the efficiency of your vehicle’s fuel system and extend the lifespan of the fuel pump. By following the step-by-step guide outlined in this article, you can easily wire a fuel pump relay yourself and reap the benefits of improved engine performance and increased fuel efficiency.

Term Definition
Fuel Pump Relay A device that controls the flow of fuel from the fuel pump to the engine.
Wire Strippers/Cutters Tools used to strip the ends of wires during the wiring process.
Electrical Tape A type of tape used to secure electrical connections and prevent them from coming loose over time.
Ring Terminals Small metal rings that are attached to the ends of wires to create a secure connection.
Butt Connectors A type of connector used to join two wires together.