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How can I test fuel pump after removal

Discussion in 'Stock 1991 - 1994 Explorers' started by bigredscowboy, July 8, 2011.

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    1. bigredscowboy

      bigredscowboy Member

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      City, State:
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      Year, Model & Trim Level:
      2003 Ranger Edge 4.0 4x4
      1992 X 2-door 2wd:
      Checked all three relays and fuses, which are good. When I turn the key on I get 2 seconds of power to the inertia switch and the red wire on the fuel pump. No whirling/charging. Is there anything it could be other than a bad fuel pump?

      I only ask bc I picked one up at a junkyard to confirm that it was in fact the fuel pump before spending a bill on a new one, and it didn't work either (i even cleaned this one up). I got a warranty at junkyard so I can go get another one but I'd like to check it in the parking lot before leaving if possible. Can I just hook the black and red wires up to leads on the battery or do I also need to do something with the other two wires? What can I expect from a good pump?
       
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    3. something9000

      something9000 Active Member

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      well if you can get to the connector that the fuel pump is connected to and just plug in the replacement and turn the key it should wiz for the 2 seconds. I assume you know where that connector is. if it doesnt perhaps the harness got damaged somewhere along the line.
       
    4. bigredscowboy

      bigredscowboy Member

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      yeah, i was looking for a way to bench test at the yard. I found a new looking pump at the yard and hooked battery leads up to the red and black connectors at the pump and got a whirl. Came home and plugged it in and all was well.

      Also realized that the other two wires are for the fuel gauge.
       
    5. ld50

      ld50 Oh, the money you`ll blow

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      I know you figured it out but....
      For future reference here is a pic showing the pump power connections 12v +&- for bench testing.

      [​IMG]

      1st Gen verified
       

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