First check the nameplate, select the capacitor; Then the line of the motor is pulled out about 1.5 cm, and then its red and blue line is connected with the capacitor, which is generally endless, regardless of positive or negative, and both ends can be connected; Then connect the yellow wire to the power supply, and connect the remaining one to the neutral wire; Finally, the insulation treatment is done, and the power is tested.
This is still very common, first of all, before the test, to do a good job of discharge, that is, to remove the components, causing a false short circuit, and then look at the capacity written in the label, adjust the gear of the multimeter.