89 Toyota 4x4 Battery & Break light

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Discussion Starter · Mar 5, 2005

How do you test for a bad diode in an altenator?

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Discussion Starter · #2 · Mar 5, 2005

kelley wrote:
> How do you test for a bad diode in an altenator?

Should have high resistance in one direction and low resistance in the other
direction. If low or zero both ways diode is shorted, if high or infinite
both ways diode is open.
davidj92

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Discussion Starter · #3 · Mar 5, 2005

if using an ohm meter you must disconnect the stator first.
Joe

"davidj92" <[email protected]> wrote in message
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[email protected]et...
> kelley wrote:
>> How do you test for a bad diode in an altenator?
>
> Should have high resistance in one direction and low resistance in the
> other direction. If low or zero both ways diode is shorted, if high or
> infinite both ways diode is open.
> davidj92
>

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