For the first time we construct the circuit, it doesn't work as it should be. The problem is we make wrong connection for the relays. Then we do the continuity test in order to check the connection of the relays. Firstly we have to determine the common pin. Then we have to determine the NC pin and NO pin. We test the circuit by connecting the probe to the common and NO pins. Once we push the control button, the buzzer of the multimeter will 'buzz' if common pin connected with the NO pin.
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