Question about 1998 Jeep Cherokee

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Fuel relay circuit problem

I have a 1998 Grand Cherokee that quit running while I was warming it up.Put in new Electric fuel pump,and still doesn't run. I took the connector apart back at the gas tank and jumpered 12 volts to the pump it runs. I pulled the fuel pump relay and jumper the two large connetions and it doesn't turn on the pump.I exchange the computer and it still doesn't run. I hooked up a code reader and it has a trouble code of p1282.Fuel pump relay circuit trouble. Any Ideas? .

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  • timothylcass Feb 03, 2009

    its a brand new pump and it runs with volt applied to it.

  • timothylcass Feb 03, 2009

    If the second power is not present at the relay with relay unplugged, would the problem be in the ignition swith? Or is their other componets involved?

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  • Master
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Hi and welcome to FixYa,

Your posted scan code, P1282 indicates Fuel Pump Relay Control Circuit. To verify, use a Voltmeter or preferably a test light where you jumped the relay. With the IGN key ON, there should be +12 measured.

  • If no, then problem is with the IGN B+12 coming from the ignition switch;
  • If yes, then problem is elsewhere. It may be with the fuel pump cutoff switch. In some versions/model, this would be under the rear seat behind the driver, mounted on the flooring towards the middle. Should you model/version have a built-in/factory installed amp, the fuel pump cutoff switch would be after the amp left side..
Good luck and thank you for using FixYa.

Posted on Feb 03, 2009

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  • Jeep Master
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You need to check and verify that the positive into the relay socket is active and has 12 volts when the key is on, you should have power there for about 5 seconds and then it should shut off, the next thiong to check if it was in my shop would be the ignition switch, that is where the fuel pump relay gets power.

Posted on Feb 03, 2009

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  • Master
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This relay is missing signal from the ignition or it missing ground. Check wiring on relay with relay plugged in and ignition off,there should be one constant power with relay unpluged and ignition turned ON there should be a second power wire at relay. When ignition is turned off power should go away. If this is present check for steady ground, ground should be present at relay at all times. Most codes that pop up for fuel pump relay in my experience is when relay is missing ground NOT power. If ground is missing trace ground wire back to look for short in harness. To confirm that ground is the problem make an independent ground splice wire and connect the vehicle should start. Good luck and contact if you need more help. Thanks for using FIX YA

Posted on Feb 03, 2009

  • O Mclean Feb 03, 2009

    Could be a bad switch but again you have to trace that second power wire back to ignition to make sure its not broken. Good luck Yeah I know its alot of work.

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  • Expert
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THIS SHOULD HAVE FIXED THE PROBLEM , WAS THE FUEL PUMP A REBUILD IF IT WAS YOU COULD HAVE THE SAME PROBLEM AS BEFORE , HAVE HAD PROBLEMS OUT OF REBUIELDS

Posted on Feb 03, 2009

  • Allen Neal
    Allen Neal Feb 03, 2009

    I WILL CK MANUALS FOR OTHER IDEAS HAVE MECH MANS ON THIS MODEL JEEP

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