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What does it mean when the connectors are hooked up to fuel pump and the negative and positive wire inside fuel pump are bothe live

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How are you measuring the voltage? or just guessing based on "spark". Inside the fuel pump? Usually, the pump is sealed and you can't get to the inside to measure anything.

Posted on Mar 28, 2015


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Posted on Jan 02, 2017

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SOURCE: 2001 Chevrolet Impala 3.8 fuel pump wiring diagram

The wires should be grey, orange and black, purple, and a black wire. The purple goes to purple, grey to gray. The orange and black goes to the small black wire on your car harness and the black goes to the bigger black.

Posted on Apr 30, 2009

  • 140 Answers

SOURCE: fuel injectors on 1982 Nissan 280zx will not open. I

All you have to is check if the fuse or relay are working. If they are, your injectors should be replaced. In the future, use a fuel injector/ carburetor cleaner after every fill up.

Posted on Sep 11, 2009

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Posted on Sep 24, 2009

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SOURCE: s10 chevy pickup died, replaced fuel pump, still

Have you checked your ground wire to the pump?

Posted on Sep 27, 2009

  • 1016 Answers

SOURCE: negative wire on coil to hook up tach on 1995

If you have a good look at the coil, it should still have a positive and negative sign on it somewhere. Try not let the extra wires confuse you too much. These are for the ignition module in the distributor. let me know if you need further clarification after you've had a look.

Posted on Apr 02, 2010

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Wont start fuel pump

Hi Louis, I'm AL the owner of Big As Auto Repair in St Charles Mo

Louis, the best way to check power to the fuel pump is using a test light and probe the power wire on the connector at the pump, but you'll need to drop the tank a little to get to the connector. NOTE: Run a jumper wire from the battery negative cable to make sure you have a good ground. Touch the power wire while someone turns the key on, if the test light comes on the power is good. BUT, you also want to check the ground wire and here's how you do it. Move the jumper wire from the negative terminal too the positive terminal at the battery, next probe the ground wire at the pump connector, if it comes on then both power and ground are OK and you will need a pump. BUT, if one or the other doesn't come on then you'll need further assistance, please send your family and friends to my website and if you need further help click here: Auto Repair

Mar 18, 2015 | 1998 Dodge Caravan

1 Answer

My fuel pump of my opel coarsa doesnt want to pump petrol and i have checked power on the socket is coming but i doent charge please help

Good day. A couple of things can cause your problem. First thing you can try is to connect a 12v supply to your fuelpump to see if its running. both positive and negative. There will be a positive supply present on the pump with ignition on. Its the negative wire thats being switched by a relay that is triggered by an electronic pulse censor. This censor works of a toothed gear on the front pulley. This censor also triggers the injectors as well as your spark. So if you have spark on the sparkplugs it means the censor is ok and that means your fuel relay is faulty. Most of the times its the fuel relay.

Jan 10, 2014 | Opel Corsa Cars & Trucks

1 Answer

I have a 2001 Chevy Blazer, I have a full gas tank that's leaking fuel. I want to pump out the gas by using the fuel pump. Where can I hook up a positive feed that's easily accessable to turn on...

The easiest (and least invasive) way to do that would be to remove the fuel pump relay and jumper the connections to make the fuel pump run. One connector at the fuel pump relay should be hot at all times (without the key on). Jumper this connector to the connector that goes to the fuel pump. The connector that goes to the fuel pump will be the connector that is opposite DIAGONALLY from the wire that is hot at all times.

The fuel pump relay is located in the underhood fuse block mounted on the left fender apron. The diagram inside the fuse box lid will show you which one it is.

Aug 11, 2011 | 2001 Chevrolet Blazer

1 Answer

For fuel pump relay which is hot and negative to jump wire to fuel pump

I had a burnt connector (twice) between the relay in the trunk and the fuel pump. Had to bypass the ground lead and take it straight to ground. Then the battery side burnt out and had to replace both connectors with male/female spade connectors.

Jul 16, 2011 | 1993 Jaguar XJ6

2 Answers

We replaced the fuel pump on our 2001 chey 1500 4.8 and the fuel pump still will not come on and there is power getting to the fuel pump but the fuel pump wont come on


Oct 01, 2010 | 2001 Chevrolet Silverado 1500

1 Answer

Where is the fuel pump located

Inside the tank. R&R procedures below. Let me know if you have questions.


  1. Reduce pressure in the fuel lines as follows:
    1. Turn the ignition to the OFF position.
    2. Loosen the fuel filler cap to release fuel tank pressure.
    3. Disconnect the fuel pump harness connector located under the rear seat cushion on Elantra or in the area of the fuel tank on the remaining models.
    4. Start the vehicle and allow it to run until it stalls from lack of fuel. Turn the key to the OFF position.
    5. Disconnect the negative battery cable, then reconnect the fuel pump connector.

  2. Raise the vehicle and support it safely.
  3. Remove the fuel tank from the vehicle. Disconnect the hoses at the pump.
  4. Unbolt and remove the pump from the tank.

To install:
  1. Install the new pump with new gasket in place into the fuel tank and secure.
  2. Install the fuel tank into the vehicle.
  3. Connect the fuel lines and the electrical connectors to the fuel pump and sending unit.

8.Connect the negative battery cable, pressurize the fuel system and check for leaks.

Sep 25, 2010 | 1992 Hyundai Excel

1 Answer

I own a 2000 chevy blazer with a 4.3 v6 vortec. It will turn over but not start up. I replaced the fuel pump, the fuel filter, the plugs and wires, and the pressure regulator. If i dump a little gas in the...

did you check power and ground at the fuel pump connector?there should be power at two wires at the connector,one should have constant power with the key on and thats for your fuel gage,the other power wire should have it only when cranking or for about 3-5 seconds when the key is turned on,check both of those first and that will let you know that everything is fine all the way forward of that connector,also did u replace just the pump or the whole sending unit?if you just replaced the pump the connector that runs fron the sending unit to the actual pump itself inside the tank also goes bad on this setup too,look for brown or burn marks on the inside of the sending unit where this connector hooks uo,hope this helps

Sep 11, 2009 | 2000 Chevrolet Blazer

1 Answer

1989 ford f150 cranks over but wont start, have replaced all the obvious stuff.

does fuel pump run when you turn key to the run gas cap stick in a funel put ear to funnel.. have some one turn key to run position......does check engine light come on when key in run position.......they have two very common problems....first the fuel pump relays and next very common problem is the ground for the ecm...main computer.....look at the battery then look at ground or negative wire you wiil see a smaller wire comming off the terminal. these will got to a bullet looking connector...cut out this connector and hook wires directly. even if not your problem it will be one day...write back if more needed

Sep 04, 2009 | Ford F-150 Cars & Trucks

3 Answers

Fuel gauge stays on full

Change the sending unit it is not working.

Aug 21, 2009 | 2003 Nissan Altima

2 Answers

Want to replace fuel pump need help to where its at and how to do

Fuel pump is located inside the fuel tank access cover location. Here's the details:

  1. Properly relieve the fuel system pressure.
  2. Disconnect the negative battery cable.
  3. Open the rear access door.
  4. Release the catch for the back seat and tilt the seat out of the way.
  5. Move the carpet behind the seat that covers the fuel pump access panel.
  6. Disconnect the fuel pump electrical connectors.
  7. Remove the screw securing the ground wire.
  8. Remove the four screws securing the fuel pump access panel and position it out of the way.
  9. Remove the hose clamps connecting the fuel hoses to the fuel pump.
  10. Disconnect the fuel hoses from the fuel pump.
  11. Disconnect the fuel tank pressure sensor electrical connector.
  12. Remove the eight retaining screws securing the sender assembly to the tank.
    WARNING The fuel assembly is easily damaged. Use care when removing the assembly from the tank.
  13. While twisting and tilting, gradually lift the fuel sender assembly and remove from the tank.
  14. Wrap the fuel pump assembly in a rag before removing the assembly from the vehicle.
  15. Cover or seal the fuel tank until installing the fuel pump assembly.
  16. Remove the retaining hardware that holds the sender to the fuel pump assembly.

To install:
  1. Install the retaining hardware that holds the sender to the fuel pump assembly.
  2. Remove the temporary covering or seal that was used to protect the tank.
  3. Install the fuel pump into the access port on top of the fuel tank.
  4. Carefully, twist the fuel pump as necessary to properly position it in the fuel tank.
  5. Install the eight retaining screws securing the sender assembly to the tank.
  6. Connect the two fuel hoses to the pump and secure with clamps.
  7. Connect the fuel tank pressure sensor electrical connector.
  8. Insert the ground wire and fuel pump electrical connector through the access hole and install the access cover.
  9. Connect the fuel pump electrical connector.
  10. Secure any loose wiring with adhesive tape and reattach the carpeting.
  11. Release the catch for the rear seat and put the rear seat in the normal position.
  12. Close the rear access door.
  13. Reconnect the negative battery cable.
I can help you further and show you where you can access the information for free. Good luck!

Apr 28, 2009 | 2000 Kia Sportage

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