Question about 2003 Pontiac Grand Am

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Do u change wiring harness when u change fuel pump

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  • Pontiac Master
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It says it is recommened to change harness,here they are.

Posted on Jan 16, 2013

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Posted on Jan 02, 2017

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2000 chevy truck 3500 check wiring on fuel pump harness


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Jan 22, 2016 | Cars & Trucks

1 Answer

Changed fuel pump,now won't start!


You may have tripped the relay switch or blown a fuse.Can you hear the pump running when the Key is in the run position? If not, then check where you pluged in the new fuel pump wires to the wire harness, For propper voltage.If no voltage is pressent at the wire harness then you go back to the fuse pannels.Good Luck.

Dec 11, 2010 | 1997 GMC Jimmy

1 Answer

How do you change a fuel pump on a 2001 Chevy Prism?


Disconnect battery, remove lower rear seat (you will see a metal plate bolted down with a wire harness), Unplug fuel pump wire harness, remove fuel pump retaining bolts, install new one. Make sure you are in a well ventilated area as this involves a flammable liquid. Make sure all windows and or doors in the vehicle is opened.

Aug 12, 2010 | 2001 Chevrolet Prizm

1 Answer

Where is the ground or grounds on the harness that


I doubt you have a fuel issue if you replaced the pump. Try this to bypass the fuel pump. Spray some quick start or brakle cleaner into the throttle body. If the car still does not start then the problem is ignition related, NOT fuel related. If it does start then go to mitcell1diy online , search. You can get all the diagnoses info there.

Jun 28, 2010 | 1997 Chevrolet Monte Carlo

2 Answers

Put new fuel pump now the pump runs but the power wire only has 7 volts of power how much is it suppose to have


If your pump is running on 7vdc, you are not getting enough fuel pressure to sufficiently supply the engine with gas, and it will run rough, sputter, surge, backfire, all manner of unpleasant things. If this is the case, and you are reading 7vdc while the pump is connected, this could indicate a problem within the fuel pump or fuel pump electrical circuit. Turn the car off, unplug the fuel pump wire harness from the fuel pump, insert your voltmeter leads into the vehicle-to-fuel pump wire harness connector, then have a helper turn the key to "on." You will have two-three seconds before the computer senses no fuel pump return signal, and shuts off voltage to the fuel pump. Observe the voltage coming from the vehicle wire harness to the fuel pump connector, it should be 11-13vdc. If it is, and only drops to 7vdc when connected, there is a partial short in the wiring from the point the fuel pump plugs into the harness, or the pump just creates a large voltage drop. Every device causes a voltage drop while in use, but 5vdc is too much of a loss. Re-examine the fuel pump installation, and make sure there are no obstructions over the fuel pump inlet, and that the wire harness inside the tank is okay.

Jan 26, 2010 | 1997 GMC Jimmy

1 Answer

I just replaced the fuel pump again, it engaged and pump worked, once! what could cause this? any relays or fuses to look at?


It's common for the wire harness from the pump to the frame to go bad when the fuel pump is replaced. The harness is around $15.00 and should be replaced the same time the fuel pump is replaced. If you can get to the wire harness to move it around and see if the fuel pump would start to work, then you know it's the wire harness and you can also disconnect the wire harness at the frame to check for 12v. Food for thought also, was the fuel filter replaced shortly after the fuel pump??? It may have picked up dirt that got in the gas tank and is not to dirty to let fuel flow through. Good luck and keep me posted.

Dec 22, 2009 | 1996 GMC Sierra

2 Answers

Birning the fesue for the fuel pump


You could have a short in the wire harness to the fuel pump or the fuel pump it self is bad or the relay has gone bad also. Start with the replacement of the fuel pump relay and also find the wire harness to the fuel pump sending unit from the frame to the gas tank and disconnect the connections. If the fuse does not blow when the connection to the fuel pump is disconnected, then it's a go chance that it's the fuel pump. If the fuse blows and the wire harness is disconnected, then the problem is towards the fuel pump relay and fuse block. Good luck and keep me posted, be glad to help you get your car running 100% again. 

Jul 27, 2009 | 2003 Kia Rio

3 Answers

1999 oldsmobile silhouette van won't start. no power to fuel pump


I have a silhouette and it had the same problem
Follow the fuel pump wiring harness to where it plugs into the floor of the van--pull the connectors apart--they will probably be corroded, and you will possibly have to change both wiring harnesses or connectors.

May 25, 2009 | 1999 Oldsmobile Silhouette

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