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Your books probably say that bacause motors have a very high inductace and will have dirrerent resistances depending on a number of conditions such as mechanical load, frequency, etc. At the very low DC voltages used by most ohmeters, the inductance is negledgable and an ohmeter can be used to test for shorts if you know the resistance of a good motor of the same type.
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Ackkk I figured it out.  The resistance may be too small for the ohmeter to work. That is the reason why my books say that.
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Last edited by Adam Y. : 03-07-2003 at 15:13.
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