Alternator/Charging 200: New Developments II
Armanmik at earthlink.net
Thu Dec 13 07:39:58 PST 2007
> a) does anyone know how to test a diode? I'm assuming its a resistance
Unsolder one end of the diode (take it out of circuit).
Use an ohmmeter, measure resistance one way, then reverse leads, measure
Only acceptable result, zero one direction, infinity the other.
Zero-zero is shorted, infinity-infinity is open. Sounds like yours may
> b) does anyone know what type of diode I'd be looking for if I wanted to
> replace it?
Radio Shack - anything rated at 50 volts PIV (peak inverse voltage) or
more, plus probably 10 amps or more. These are cheap, come in a two or
three pack for a couple of bucks. I'd go for 200 PIV, 10 amps. Check
polarity!!!! White band is cathode end, match the orientation of the
Symbol for a diode is --->|---, power flows the direction of the arrow,
but not backwards.
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