Fuel pump relay location?

Hello,

The fuel pump relay is Number 303 in the main PCD under the hood. Here is a guide and some fuse box diagrams (below) to help you get the problem fixed.

https://www.2carpros.com/articles/how-to-check-an-electrical-relay-and-wiring-control-circuit

Please let us know what happens so it will help others.

Cheers, Ken

Try this find the inertia fuel cutoff switch behind the right kick panel try resetting it and turn key on do you hear the fuel pump If not remove switch and jumper the electrical connector, try key again Le tme know-

If you had visibly dirty fuel in the tank then I suspect the pump has failed. They are not able to handle much contamination so we need to start with checking the pressure. Here is a guide that will help with this.

https://www.2carpros.com/articles/how-to-check-fuel-system-pressure-and-regulator

Also, if you had dirty fuel then you may just have a fuel quality issue which means we need to drop the tank and clean it out and put fresh fuel in it.

If you have to replace the pump, here is a guide that will help with this.

https://www.2carpros.com/articles/how-to-replace-an-electric-fuel-pump

Below you will find the process from the manual on how to replace this.

Please let us know if you have other questions. Thanks

Your vehicle's fuel pump relay is located in the central junction box (relay 303 ) pictured below.

The central junction box is located behind the right side kick panel.

Thanks for using 2CarPros.com!

The first thing I would look for is if there is a wire that is grounding out. Start from the fuel pump in the fuel tank and trace the wire going from the back to the front. sometimes it will be hard to get to but if there is a wire that is ground out it might only do it at times if there is a vibration or the wire moves. you say that after you changed the pump and filter it ran ok for a couple of weeks before blowing the fuse , then I would start looking around that area. Also replace the fuel pump relay they can cause a short as well.

Here is its location I have giving you all the relay and fuse locations for your 2001 Ford truck.

https://www.2carpros.com/articles/how-to-check-an-electrical-relay-and-wiring-control-circuit

Check out the diagrams (Below)

Please let us know what you find.

Cheers

There is a number of things we have to consider before starting the diagnosis. First, if you were measuring that 6 volts at the fuel pump's connector with it unplugged, that may be confusing the real cause of the problem. This would be similar to standing on a garden hose and blocking ninety nine percent of it. You would still see full pressure at the nozzle, as long as it was closed. No water is flowing, so no pressure is dropped across your foot. Voltage is electrical pressure. With the connector unplugged, no current is flowing, so no electrical pressure, (voltage), is dropped across some undesirable resistance in the circuit.

The ignition switch does not need to be on for this. The jumper will energize the circuit, and the fuel pump should be running. If it is, this entire part of the circuit is okay. If it is not running, now is the time to work your way through the circuit with the test light.

Just replace the fuse and relay. If it blows again then that means there is a problem on that circuit, most likely being a faulty fuel pump. Here is the relay location. Check out the diagrams (Below). Please let us know what happens.

Are you getting power to the relay terminals 86 and 85 when key is turned on ? what is yoru readings at terminals 30 and 87 and 30 and 87a? do you have voltage going to the shut off switch?

This guide should help with the fuel pump relay below.

https://www.2carpros.com/articles/how-to-check-an-electrical-relay-and-wiring-control-circuit

Check out the diagrams (Below). Please let us know what happens.

Fuel Pump Relay.....On engine bay fuse/relay block. relay # 2

Fuel Pump Actuation
When ignition switch is turned to START position, PCM operates fuel pump relay to provide fuel for starting engine. PCM senses engine speed and shuts off fuel pump by opening ground circuit to fuel pump relay when engine stops or speed drops to less than 120 RPM. When ignition switch is in ON position, EEC power relay is energized (contacts closed). Power is provided to fuel pump relay and timer in PCM. Fuel pump receives power through fuel pump relay contacts.

When dual tanks are used, each tank is equipped with a low pressure pump. Such a system has a total of 3 pumps: 2 low pressure and one high pressure.
High Pressure Fuel Pump
The high pressure fuel pump is positioned inside fuel tank. A reservoir is built onto pump and sender assembly.
In a 2-tank system, sender assembly handles switching of high pressure fuel through internal valves. Should one tank overfill during use (return line returns fuel to wrong tank), pump and sender unit in overfilling tank need replacement.
The high pressure fuel pump is capable of pumping over 33 gallons (125L) of fuel per hour at a working pressure of 39.2 psi (2.75 kg/cm2 ). This pump also has internal pressure relief and discharge check valves.
Mechanical Selector Valve
A driver-operated selector switch controls selector valve for switching fuel supply from one tank to another. This valve switches fuel supply and return lines from one tank to another in response to fuel pressure from in-tank pumps acting on its actuating diaphragm.
The diaphragm switches tank connection when less than 2 psi of fuel pressure is acting on upper side of front tank and lower side of rear tank. Valve function depends upon proper operation of in-tank low pressure pumps. In all dual-tank vehicles, excess fuel not used by engine is returned to same tank from which it was pumped.*****

Hi, thanks for the donation. Relay number 2, should be for the fuel pump. If you got the relays mixed-up, read on the relays, if the diagams-- amp rating--model numbers are all the same, it won't matter which relay goes for the fuel pump as long as it is functional. If you plugged a faulty relay into a different circuit, it could effect that circuit.

I'd have to test the circuits at the fuel pump relay, there is a power relay that sends voltage to coil side of fuel pump relay, I'd check that also. The pcm grounds the coil side of fuel pump relay in orfer to energize.