Question about 1998 Jeep Cherokee

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Fuel pump works relay were fix how many fuel pump

How many fuel pump relay switches are there . There is no power going back to the fuel pump.

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  • Anonymous Mar 14, 2014

    i have 00.6v with key off and 00.8/00.9v when turn key on, then back down to 00.6v.

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  • Contributor
  • 33 Answers

First you need to test your wires going back yo the fuel pump inorder to see if you have a bad wire or not.. does the fuel pump initilize upon turn ignition on . if yes then you need to chk possible spark issuie . if no initilize then test connector at the fuel pump and work your way back to the fuel relay swtch and if that tests out work your way back to ignition switch . ( s/b only 1 relay )

Posted on Jul 01, 2009

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Posted on Jan 02, 2017

  • 2 Answers

SOURCE: no power getting to the fuel pump.

check your trunk for an emergency shut off button for fuel pump its usually a black littile box on the side with a red reset button in it

Posted on Mar 27, 2009

  • 242 Answers

SOURCE: Power to fuel pump on 91 ford mustang cobra 5.0

The ignition module sends a "pip" signal to turn on the fuel pump and keep it running. If the signal is lost, or not present you get no pump. This is a safety in case of accident or other hazard in order to shut off the fuel so it wont keep pumping into a car with the key still on but engine disabled for some reason. Take the module to your local parts store and have it tested, for free to check.

Posted on Sep 30, 2009

Skorpyo
  • 133 Answers

SOURCE: 1984 DL in tank fuel pump.

The in-tank pump does run constantly. The outer pump is the one that is switched. I'd suggest that you rewire properly, as using a jumper will cause you more headaches.

Posted on Oct 30, 2009

  • 4 Answers

SOURCE: no fuel pump acuation

It may be the computer not sending a signal to the fuel pump accuator. Changed the computer in mine and I don't have a problem anymore.

Posted on Dec 06, 2009

  • 1584 Answers

SOURCE: Iam getting no voltage tto my fuel pump,front tank

Poor earth connection most likely causing hifgh resistance voltage drop.

Could also be a faulty pump. Run a separate power supply to it and recheck.

Posted on Mar 10, 2010

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2 Answers

1992 Ford E150 has no power to fuel pump, inertia switch good, relays good, new pcm i am lost.


the pressure regulator controls the power requirement to the fuel pump
when pressure is reached , it allows power/circuit to the ECM to be broken which in turn stops the pump relay from working
when the pressure drops , that circuit is energized and the ECM switches on the circuit , to the relay allowing power to the pump to supply fuel to get the pressure back up
for the circuit operation you will need a schematics of the electrics for the vehicle ( workshop manual) as some may not use the ECM but go straight from the pressure regulator to the relay through a fuse

Jun 14, 2017 | Ford Cars & Trucks

3 Answers

My Ford Windstar fuel pump work, relay, and fuse work also but there is no power on my fuel pump, any ideas?


Have you checked your fuel shut off valve. It is behind the taillight on the passenger side, open the door where the jack is and look toward the back of the taillight. Should be a black box with a red button on top, if its tripped then all you have to do is push it down you will hear it click and the button will stay down. I try to locate you a wiring diagram. Good luck

Jan 12, 2015 | 2001 Ford Windstar

1 Answer

Why is my fuel pump not getting power to it


I think I missed something here. The relay is grounded by the computer, and it sends voltage to the pump. The relay is grounded for 3 seconds when the key switch is turned on.
Are you saying the relay has power going out but its not getting to the pump in the tank ? And if it is a Ford product, did you check the inertia switch ?

May 12, 2013 | Ford Cars & Trucks

1 Answer

93 geo metro died and wont start. fuel pump works when the fuel pump relay is removed and jumped with a wire. put it back in and turn the key on and i get a click at the relay but the fuel pump does not go...


You should have two sources of power, a ground from the computer, and the circuit going to the pump.
Do you have both sources of power when the key switch is turned to start ?

Feb 25, 2013 | Geo Cars & Trucks

1 Answer

I have a 06 f150 5.4L the fuel sending unit went out so i had to change to pump and everything, the pickup ran fine before but wen i put the new pump in it will not work so i tried resetting the fuel pump...


Hello, There is a fuel pump Relay in the Powerbox under the hood. The system works this way. When you turn on the Ignition switch, it trips the Fuel pump Relay. The power is routed to the fuse from the Relay and then to the Inertia (safety) cutoff switch. Finally the power reaches the Fuel pump.

You need to test the fuse holder for power before it flows through the fuse. You should have the Ignition on, in order for the Fuel pump Relay to provide power to the fuse. Although the fuse may be good, it can not work without power.

On most Models, the horn Relay is the same part as the Relay on the Fuel pump. Just check your part numbers and swap out the two parts and see if it helps.

Jun 24, 2011 | 2006 Ford F-150

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

I have no power to fuel pump. replaced the pump and the fuel relay switches


the relay gives the pump power for 2 seconds at key on, then when the engine is running, the oil pressure switch supplies power. make sure all fuses are good.

Dec 03, 2010 | 1994 Chevrolet S-10 Blazer

3 Answers

Electrical problem 89 gmc pickup


You could always run a fused wire from the fuse panel to the relay. This way when you turn the key, power goes to the accessory on the fuse panel, the fused wire you installed, and to the relay circumventing the problem and creating a protected circuit.

Feb 27, 2010 | 1989 GMC Sierra

2 Answers

I can get power th the fuel pump when i run a hard wire from the battery to the relay but when i put the relay back in no power to the fuel pump


You need to replace the relay switch. About $17.00 from your local Ford dealer. This will be a dealer item only.

May 24, 2009 | 1998 Ford Windstar

1 Answer

No power to fuel pump or to pump fuse at fuse block


You can get wiring diagrams from autozone.com -- they have parts of repair manuals online. I have the smae problem but the person I got my 88 fox gl from wired up a switch going to the fuel pump that you have to leave on while driving. I"m probably giong to fix this soon. It looks like the wire powering the fuel pump relay comes from the ignition switch. So if the pump side of the relay is good, but aren't getting power, you may want to see if your ignition switch isn't providing power on one wire, going to the fuel pump relay.

Jun 24, 2008 | 1990 Volkswagen Fox

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