Question about 1996 Pontiac Grand Am

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IT WON'T TURN ON EXCEPTTED WITH STARTTING FLUED? i need a diagram of the fuel pump!

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  • Pontiac Master
  • 5,332 Answers

GM fuel pumps are really easy to diagnose.

Back at the fuel tank you will see a harness that goes to the fuel pump. There will be two grey wires, one black, and one purple wire. The larger grey wire is the power supply to the fuel pump. There should be power on it for 3-5 seconds when the key is turned to the run position and anytime the engine is cranking over.

If there is power there and you have no fuel pressure than the pump is bad. Take a rubber mallet and hit the center of the fuel tank while somebody cranks the engine over. If the pump starts to run you just confirmed that it is bad. Hitting the tank is not a repair. Usually it tells us that the brushes are bad or the commutator is worn out in the pump. Hitting the tank will jar the pump just enough to getting it working in most causes.

If you have no power to the pump let me know and I'll get you some more info on what to check. It is rare to have other issues.

Posted on Mar 13, 2011

Testimonial: "may you give me a diagram of the tank & the pump yhak you oal"

  • Jeremy W.
    Jeremy W. Mar 16, 2011

    Hope this helps.

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