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Thread: How can i test the diodes on a Mecc Alte alternator?

  1. 09-30-2011 10:32 AM #1
    merryengineer
    merryengineer is offline Senior Member Forum Master
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    Default How can i test the diodes on a Mecc Alte alternator?

    How can i test the diodes on a Mecc Alte alternator?
    Can i know if they need to be replaced?
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  2. 09-30-2011 10:34 AM #2
    wellandpower
    wellandpower is offline Administrator Forum Master
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    All you need is a Multimeter.

    A diode only allows current to flow in one direction. Therefore if you test the resistance of the diode both ways, one way it will have a low resistance and the other way a high resistance.

    If this is true, then the diode is OK.
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