To test a Mih-Sh-124LM 16A relay, first ensure it is disconnected from any power source. Use a multimeter to check the coil resistance by measuring across the relay's coil terminals; a typical reading should be within the relay's specified range. Next, apply the rated voltage to the coil to activate the relay and use the multimeter to measure continuity across the normally open (NO) and normally closed (NC) contacts; the NO should show continuity while the NC should not when the relay is energized. Finally, de-energize the relay and confirm that the NO contact loses continuity and the NC contact regains it.
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