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Car Forum / Toyota / Toyota Trucks / February 2005

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89 Toyota 4x4 Battery & Break light

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kelley - 27 Feb 2005 03:36 GMT
How do you test for a bad diode in an altenator?
davidj92 - 27 Feb 2005 15:57 GMT
> 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
Joe - 28 Feb 2005 07:20 GMT
if using an ohm meter you must disconnect the stator first.
Joe

>> 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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