The motor of the illustrated motor controller fails to start on an attempted startup. You ensure the motor has not tripped out on overload, and you check the disconnect switch closed. With the start button depressed, a voltmeter reading between 3 and 4, in figure "A" of the illustration, indicates line voltage. After re-opening the disconnect switch and verifying the circuit de-energized, what should be your next step in the troubleshooting process?
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