Question about 2001 Mercury Mountaineer

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2001 Mercury Mountaineer keeps blowing the PCM power diode (fuse #19)

I was driving and my 2001 Mercury Mountaineer and it stopped and would not start again. It cranks okay, but it won't start and I checked the fuses and the #19 position (25 amp) fuse in the fuse box keeps blowing the fuse that controls the PCM power diode. I have put in five fuses and everytime I turn the key on, it blows the fuse.

Any suggestions.

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  • 4 more comments 
  • roger1thomps Sep 18, 2008

    The battery connections have been checked.

  • Anonymous Mar 15, 2014

    what clicks around my fuse box to make my windows not work and the inside lite wont work but if it clicks back everything will work good until it clicks again

  • Anonymous Mar 15, 2014

    check master control switcth drivers door, checked motor, and the all work, checked fuses but not sure where relay is for windows to chesk that

  • Anonymous Mar 18, 2014

    check engine light not working

  • Anonymous Mar 30, 2014

    Something drawing my battery when car is off?
    Checked the fuses with a test light. I think I found the problem fuse, exterior 19- Accessory delay relay- subwoofer and 4WD, low beam.

    where is the ARD located?

  • Anonymous Mar 31, 2014

    all looks ok when first turned on. then when turn key to start it blows pcm fuse.

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3 Answers

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  • 1,952 Answers

Check ur battery and motor belt inn ur vehiclles

Posted on Sep 18, 2008

  • mohammed marika thambi
    mohammed marika thambi Sep 18, 2008

    check ur wiring components in ur vehicle front panel....check motor belt ...at the same time check whether its runs in a right rpm...

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  • Master
  • 1,011 Answers

Dear Sir/Madam,
Clean the inside of the throtle body where the butterfly is. Also clean the idle speed control which is on the side of the throtle body. Good luck.
1) Replace EGR valve He also found a leak (with a special leak detecting gadget) at the intake manifold, so that gasket is being replaced.
2) Check your pcv valve, this on thing can cause a lot of troubleshooting. Only 3-5 dollars to buy.
Thanks
Good Luck

Posted on Sep 18, 2008

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Check all of the battery terminals and cables and check the wires on the starter/selonoid, start from the battery and follow the cable out and check all conections , clean and tighten them and if it still does it the starter/selonoid is bad and needs replacement...

Posted on Sep 18, 2008

  • masterexpert Sep 18, 2008

    check the blower motor regulator if the connections are loose there -if this doesnt fix,new blower motor.

    thanks

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