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Where is my pcm power diode?

Discussion in 'Stock 2002 - 2005 Explorers' started by PattyJoe, July 31, 2019.

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  1. PattyJoe

    PattyJoe New Member

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    My 2002 ford explorer 4.0L keeps blowing fuse 41 under the hood. I want to check the pcm power diode. Can someone please tell me what it is and where it is located? I suspect the reason for my problem to be a short in 02 sensor circuit. So if I go to my pcm power diode and trace the red/yellow wire back I believe I should find the cause of my short. Thank you
     
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  3. fordysenior

    fordysenior Active Member

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    I googled PCM power module and came up with several sites that might help you. Just a suggestion, since I know nothing about it.
     
  4. PattyJoe

    PattyJoe New Member

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    I’m not looking for the pcm module, i’m looking for the diode. I did google it and there were no clear answers.
     
  5. Tony from NJ

    Tony from NJ New Member

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    on the 04 it is in the fuse box under the hood, spot 60, check you owners guide their is a diagram
     
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  6. TechGuru

    TechGuru Well-Known Member

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    There are only two diodes in the fuse box.

    #1 cause of a blowing #41 fuse is a shorted out O2 sensor either internally or the wiring has melted. Remember there are multiple O2 sensors. You'll need to get under the vehicle and check the wiring of each.

    [​IMG]
     
    Last edited: August 18, 2019

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