What is Diode Test ?Diode DefinitionA diode is defined as a semiconductor device that allows electric current to flow in one direction only.Diode Test ModeThis mode on digital multimeters applies a small voltage to a diode and measures the voltage drop, indicating the diode’s condition.To test a diode with diode test mode Turn off the power source of the circuit that contains the diode. If possible, remove the diode from the circuit for more accurate results. Set the multimeter to diode test mod