Question about 2002 Ford E350

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2004 ford E350 no power to fuel pump

There is no power to fuel pump checked inertia switch checked fuel pump relay all have power. can you please help

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  • Anonymous Mar 29, 2014

    no power to fuel pump inertia switch

  • Anonymous Apr 01, 2014

    No power to fuel pump

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  • Contributor
  • 11 Answers

Put a test light on the ground wire to a 12v power source and see if the pump is grounded properly

Posted on Sep 11, 2008

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2007 ford e350 van fuse for fuel pump location


Fuel pump relay or a FPDM - fuel pump driver module , or the inertia fuel cut off switch was tripped . F150 Expedition No Start P1233 Fuel Pump Driver Module How to test an electric fuel pump no fuel psi testing Ford

Battery junction box , under hood ! Fuse # F13 20amp. The fuel pump relay is in same box . Do you know what a relay is ?

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Where is a inertia switch on a 2004 Chevy caviler I was told its under the dash


Ford uses inertia fuel cut off switch not Chevy or any other GM products . If you have no fuel pressure check the fuel pump relay an check out this video on trouble shooting GM fuel pump circuit .
GM Fuel Pump Relay Testing

Dec 23, 2015 | Cars & Trucks

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2004 ford explorer no power to fuel pump all fuses and relays good checked fuel shut off switch in kick panel not tripped


there is a recall for the inertia switch, may not be tripped but its not letting voltage thru.other than actually checking for power at the fuel pump.top of the fuel tank.

Apr 04, 2014 | 2004 Ford Explorer

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1989 f-250 inertia fuel shut-off switch switch location


This should be in the owner's manual. I found the below on autozone.com, their repair help location:
An inertia switch is used as a safety device in the fuel system. The inertia switch is located in the cab, generally under the dashboard on the right side. It is designed to open the fuel pump power circuit in the event of a collision. The switch is reset by pushing each of 2 buttons on the switch simultaneously (some models use switches with only one reset button). The inertia switch should not be reset until the fuel system has been inspected for damage or leaks.
When the ignition switch is ON , it turns the EEC power relay ON . The EEC power relay provides power to the powertrain control module (PCM) and the control side of the fuel pump relay. Power for the fuel pump(s) is supplied through a fuse link or high current fuse attached to the starter solenoid (battery side). From the fuse link or high current fuse, current flows through the fuel pump relay and inertia switch to the fuel pump(s). The fuel pump relay is controlled by the PCM.
When the ignition switch is turned ON , the fuel pump(s) will operate. If the ignition switch is not turned to the START position the PCM will shut the fuel pump(s) OFF after 1 second. The PCM will operate the fuel pump(s) operate the fuel pump(s) when the ignition switch is turn to START position to provide fuel while cranking.
After the engine starts, the PCM will continue to operate the fuel pump(s) unless the engine stops, drops below 120 rpm or the inertia switch is tripped.

Dec 28, 2013 | 1989 Ford F 250

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Ford f250 power stroke diesel will not start. Where is the fuel relay located on a 2004


Fuel pump relay is behind the radio to the left. This is inside the dash board towards the drivers side. The fuel pump inertia shut off switch is in the passenger side front kick panel. Check for power at both sources before checking at the pump itself. It might save having to drop the tank.

Sep 11, 2013 | 2004 Ford F250

1 Answer

I have a 1996 mustang v6 no power to fuel pump. Bought used fuel pump relay still have np power. Safty switch is good. Unpluged fuel turned switch on and i have constant power of 9.52 volts plug in pump...


9.5 volts sounds like the power coming from the gas gauge.
I am showing a relay module with the fuel pump and pcm relays built in along with two other relays. The fuel pump relay should not be accessable. In most cases the pump relay gets power from a 20amp fuse and the computer grounds the relay when needed. Power goes from the pump relay to the inertia switch then to the pump. So the inertia switch should be hot when the pump relay is activated.

Jun 12, 2013 | Cars & Trucks

1 Answer

No power to fuel pump.


What kind of car/truck is it? Is the inertia switch in trunk?

If you have power before relay but none after the relay is bad.

The inertia switch can also get tripped by very hard bumps jolts etc and has to get reset if it does.

Feb 02, 2013 | Cars & Trucks

1 Answer

Car will turn over but won't start. Through the


No noise from fuel pump when you turn over the car .First thing get voltage at fuel pump relay checked, is there 12 volt to the relay.If no, then problem is again the relay.--------- To reconfirm the problem, try other test, that is remove the relay and by pass the relay terminals with a jumper wire .Then with 12 volt external battery give power to fuel pump connector and see, if the fuel pump starts, then its clear that fuel pump relay is faulty.----------- Also other problem can be fuel pump inertia switch.If the inertia switch is faulty then also fuel pump will not start.-------- The fuel pump relay on a 1995 Ford Explorer is in the power distribution
box, in the engine compartment, driver's side near the firewall.----------
The fuel pump inertia switch is in the right front passenger area
it is below the dash but above the carpet in the right hand corner.--------
Its a push button type inertia switch.
--------
Fuel Pump Activation
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 engine 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.
Inertia Fuel Shutoff (IFS) Switch
All models use an electrical interrupt switch in fuel system. During a collision or vehicle rollover, electrical contacts within inertia switch open, shutting off fuel supply to electric fuel pump. Fuel supply is interrupted even when engine is running.
A reset button is located on switch assembly. If electrical circuit trips, vehicle will not restart until switch is reset. Fuel system should be inspected before resetting switch.
IFS switch is located under instrument panel, near right side of transmission hump.
----------- If the fuel pump relay, the inertia switch and fuel pump all checked ok, and fuel pump is working with direct 12 volt source to fuel pump.Then problem relates to computer.The computer (power control module, PCM) is faulty and has to be replaced.--------- This will help.Thanks.Helpmech.

Jul 17, 2011 | 1995 Ford Explorer

1 Answer

Starter motor went out on 92 5.0 ho replaced it and new battery, now fuel pump does not work I get a 542 code checked fuel pump relay and inertia switch both good fuse good


  • Code 542 indicates one of the following conditions:

Engine Starts:

· Fuel Pump secondary circuit shorted to power

· Fuel pump relay contacts always closed

· Open in fuel pump monitor (FPM) circuit between ECU and connection to POWER TO PUMP circuit

· Heated Exhaust Gas Oxygen (HEGO) sensor shorted to power

· faulty ECU

Engine Does Not Start:

· Open inertia switch or inertia switch circuit

· Open in or between ECU and fuel pump (This includes open in fuel pump brushes/windings)

· faulty ground connection at fuel pump

The easiest way to check this circuit is to go to the fuel pump relay. If the relay clicks when the key is turned to the "RUN" position, then the inertia switch circuit is ok.

The Pink/Black wire starts from the fuel pump relay and goes two directions. One side goes back to the fuel pump. The other side is the fuel pump monitor circuit and goes to pin #8 at the ECU. This wire should only be hot for a second or two when the ignition is turned to the RUN position.

The fuel pump relay receives power on the Black/yellow wire. It comes from a fusible link at the power distribution center. This wire should be hot at all times.

If all the above is working as designed, them you probably have a bad fuel pump.

Feb 13, 2011 | 1992 Ford Thunderbird

2 Answers

No fuel to the rail. New pump,filter,control module over radiator(2).checked inertia switch. if wire to inertia switch is same color code as wire leaving ECM then no power leaves ECM when switch is...


It helps if you tell what year,model, engine you are working on. Is power at the Inertia Switch? The power comes from the FUEL PUMP RELAY, the ECM only grounds the relay to turn it on. but not knowing what you are working on, thats all the info I have .

Sep 07, 2010 | Ford Taurus Cars & Trucks

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