Fan motor five wires how to measure the good and bad?

Using a multimeter can measure the good and bad, five wires were expressed: ground, utility line, three speed control line. Five lines need to be a pair of separate measurements, first need to ensure that the line is open, and five lines can not be short-circuited, the use of a multimeter to find the maximum resistance value of the two lines, and then the two separate start and run, and then between the two lines connected to a capacitor, and then arbitrarily choose one and the remaining three lines inside the arbitrary one, powered on to look at the specific steering, if the steering is right, then it proves that it is good, and vice versa. Then it proves to be good, and vice versa is bad.

/_x000b_Electric fan of some of the maintenance methods are: 1, the first power off, try to move the blades, if the turn is not very stiff, then it can be determined that the motor lubrication does not work, first of all, you need to give the place of the rotating shaft to add a little bit of oil for lubrication, on it. 2, first of all, you need to check the power cord of the electric fan there is no energized, if not energized, it is necessary to change the power cord; Measurement with a multimeter, electric fan timer and gear switch is not energized, no, then, replace the corresponding parts on it; can use a multimeter and then measure the electric fan motor to introduce the main line and gear line is not connected, if not connected, we must replace the new motor on it. Although I know the specific method, but it is better to send to the repair center for repair is better.