how to wire a relay for fuel pump

Wire pin 85 to a good ground on the car. For big pumps try 12 gauge for.

Car Relay Diagram Electrical Circuit Diagram Electrical Diagram Electrical Wiring Diagram

In our install we located the relay in the trunk for easy access.

. Im using the blue fuel pump output wire to trigger a 40 amp relay to run my in-tank Holley pump. The wiring seems incorrect to me but I can only get the pump to run off a relay. You can jump pole 30 and 86 together and run the wire from from pole 85 to the.

The basic components of an electric fuel pump are the positive and negative ground electrical terminals on the pump itself the fuel sending unit the. Run a dedicated power wire from your battery to pin 30 4. Wire pin 86 of the relay to a 12v trigger.

We drilled a small hole and used a grommet for protection to run the power wire to the pump itself. This particular application is using a black wire with yellow stripe as the power wire from the ECU this wire must be run to the 86 terminal of your fuel pump relay. Insert one end of the copper wire into the upper-left pin slot of the 4-pin receptacle where the fuel pump relay plugs into the relay center.

In this video I show how a fuel pump relay works and how to bypass yours. From The Driveway Engineer. If you need a fuel pump test or prime function like I do just wire an SPDT pushbutton switch to the small blue wire common to the ECU NC to the Holley fuel pump.

Fuel pump wiring for the RED circuit is generally going to carry a much higher current than the relay. A 5 inches copper wire with ½ inch of stripped. Each load should have its own fuse and relay.

Remove the relay centers cover and locate the fuel pump relay by reading the diagram. If youre not comfortable with electrical wiring tasks we recommend you have an experienced. Then run a jumper wire from the negative terminal of your battery to a ground point on your vehicle.

The relay should have 4 or 5 pins on it. I also show how to rewire your fuel pump for an upgraded fuel system or race car. They are usually labeled 30 85 86 and 87.

This will complete the circuit and allow power to flow directly to the fuel. Make sure that the fuel pump relay is securely held. Once you spot the fuel pump relay remove it carefully by removing the prongs that looks like electrical plug.

In this video Anthony goes over the basics of wiring up an electric fuel pump. This is the basic wiring diagram for SAFE electric fuel pump wiring. In your drawing you have a couple of choices.

We focus on making this modification along with a Classic Update kit but the process wo. So use a larger gauge wire for lower voltage drop. Relays Made Simple How to wire your fuel pump and fans plus how to enable fans in HP Tuners Tools and Supplies Used in this Video.

Run a wire from pin 87 to the positive wire. Then remove the relay from the box. When replacing the fuel pump relay make sure that you reconnect the cables and other plug-ins as well as other connectors.

And insert the other end of the wire into. This video details how to add an electric fuel pump to your project.

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