Question about 1984 Toyota Celica Supra

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If i run power strait to the fuelpump would that creat a problem i cant seem to find the fuelpump relay

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Did you check the fuse panel under the hood.

Posted on Apr 24, 2010

Testimonial: "all fueses look good"

  • stepmckirgan Apr 24, 2010

    If fuses look good start at the gas tank by dropping it and checking the harness, trace to front for signs of corrosion( green powdery ****) is what you are looking for.

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Fuse #10 keeps popping on my 2002 lincoln navigator. already installed new fuel pump and relay. any suggestions would be appreciated!


Go to Google and enter "2002 Lincoln Navigator fuse10". You will be able to look up everything for the electrical system by selecting the individual pages and clicking them.

What you would want to do is look up all the wiring "paths" to read if a component part may be shorting this fuse. When the individual components are eliminated as problems, then it must be a shorting wire. The plug-in connector for the fuelpump should be clean now, as you just had the fuelpump replaced.

What I would look for as a problem are the other wires going into the Fuelpump Relay. Only 2 wires of the 4 prongs or so will make the pump work. Could be #27 and #34. Look on internet for "jumping the fuelpump relay" on Ford products.

It would help to know if the fuse breaks when the vehicle is off, or when it is running. Reason being that the mentioned fuelpump Relay has 2 or more extra terminals that connect to other devices and they could be tested.

Finally, most people think about a Relay connecting the Positive(hot) wire to transfer power. The fact is, the Negative(neutral) wire is also used to route power and connect the coils inside Relays. When you get a short on a Negative wire, it can falsely activate a Relay coil to connect something. This also means that shutting off the car will not necessarily shut off the power.

Feb 09, 2014 | Lincoln Navigator Cars & Trucks

1 Answer

Have a 1988 F-150 with a 5.0 liter engine it has been giving some running and then dying static the other day it died for good replaced fuel pump on frame rail and put on a new filter still wont run,...


There may be a fuelpump relay in one of the underhood fuseboxes. You can try some searches for 1988 F150 fusebox diagrams to find the location of the relay. The reset of the inertia sensor (safety switch) was a good try but if the fuel pump relay is bad, there will be nothing to reset because there will be no power. There can also be a crankshaft sensor which needs to generate a signal to tell the fuelpump to run.

Jul 08, 2017 | 1990 Ford F150

1 Answer

Wiring diagram


Then the fuel pump has failed most likely. It is electric of course and located inside the fuel tank, the fuel tank must be removed in most cases to replace the fuel pump, and don't forget to replace the fuel filter

Feb 07, 2012 | Mitsubishi L200 Cars & Trucks

1 Answer

We replaced a bad fuel pump on 06 escaped limited. There is no power to fuel pump. we have checked all fuses, relays and reset switch. Where else could the problem be?


Hello, You might try a Relay that controls the PCM or ECU. They would be in the Powerbox where the fuelpump Relay is. Some of the Relays are identical so you could buy 1 and it would be a backup part for several.

You should also look at the other things the Ignition switch turns on in the Run position. Does the radio work, the fan motor, or turn signals? If they do not work look at replacing your Ignition switch.

The PCM and ECU get their power indirectly from the Ignition switch. When all have power they will connect to the fuelpump Relay. Since you said you checked the Relays, I am taking that to mean you checked the fuelpump Relay only. Many times people do not know that there are several relays which all need to connect to get the fuelpump to run. When you determine the Ignition switch is good, then the ECU and PCM relays should be getting power. Have you tested the fuelpressure Regulator? It needs to demand fuel from the pump.

The fuelpump relay depends on the ECU or PCM relays to work. One of the 2 relays may be bad and preventing the fuelpump relay from working. When you get to trouble shooting the terminals you can get wiring diagrams online or the info may be in a book at the Autoparts store.

One of the benefits of using a Dealer with the hardest problems is the tools they have. They have machines with connectors that match every wiring connector inside your car. If one section is unplugged they can test the wire loom section by section until the problem is found.

I hope you have found my solution to be very helpful and that I have brought up a few new areas to try. If trying different parts does not help, you are left with a wire by wire battle to fix this and the Dealers' better tools may make more sense.

Apr 03, 2011 | 2006 Ford Escape

1 Answer

Gmc yukon turns but will not start dont hear the fuel pump on in the fuel tank


With ignition key on run, use test light to verify you have positive & ground to fuelpump. No power (positive) check fuelpump fuse. No ground check fuelpump relay. If both positive & ground fuelpump needs to be replaced.

Jan 17, 2011 | 1993 GMC Yukon

1 Answer

Why wont my car start after replacing the fuel pump


Do you hear the fuelpump running? Check the Inertia switch under the right front passengers kickpanel. There is a button to press and it will reset.

This is a safety switch for impacts and when the fuelpump was disconnected, it can sometimes trip.

Also, when you diagnosed a bad fuelpump, there are Relays and fuses which supply the power. Your original problem could have been a bad relay.

Oct 15, 2010 | 2000 Ford Focus

2 Answers

I have replaced the fuel pump amongst a lot of other things. I can spray gas or starting fluid in the throtal body and it will run rough untill the fumes ware out. Its a 1995 ford explorer 4x4 xlt


If you hear the fuelpump operate the first 1 or 2 seconds when the key is turned to RUN position, the fuelpump is working. If you do not hear the fuelpump run, check the Inertia switch which should be in the side panel of the rear cargo area. If you have an owners manual check for the Inertia switch location.

To reset the Inertia switch, hold the button on it for 2-3 seconds. You should now hear the pump run. You may also have a fuelpump relay under the hood in one of the Powerboxes. The Powerbox may have a fusible link from the Battery. When the fusible link is OK and the Pump Relay is OK, there is a fuse in the Fuse panel. Then finally the Ignition switch will trip the Pump relay. As power flows through the wire to the fuelpump the Inertia switch can break the power connection.

So you have 5 powerpoints before the fuelpump will work. Fusible link, Pump Relay, Fuse Panel, Ignition Switch,and Inertia switch. These must all work before the fuelpump can run.

Aug 14, 2010 | 1995 Ford Explorer

1 Answer

Power to fuelpump


If you find the relay you may not need to run a wire. make sure the relay is working.

Apr 24, 2010 | 1984 Toyota Celica Supra

1 Answer

Cant find where fuelpump fuse is, no power to fuelpump


Usally in the fusebox, might also check fuel pump relay.

Mar 06, 2010 | 1984 Porsche 944

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