A diode is nothing more than a one way street or a check value. It will
only allow current to travel/flow in one direction and that is against the
arrow. With a high resistance scale selected on the multimeter, the front
to back ratio on a good diode will be 10 to 1. That means you will get a
high reading and a low or close to short in the other direction. Some
meters have a position to check diodes.
BUT you may have to lift one side so as to not see the resistance of the
adjacent components.
Hope this helps.
Garry East TN
At 06:23 PM 11/6/2005, you wrote:
Ok, oddness. E20, reverse runs fine, forward runs in one speed only. And
that speed is using the resistors; they're getting warm.
Any guesses? I'm betting card 4 diode failed. How can you check a diode?
Chris
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