Use a multimeter to measure the resistance profile "Small Cooling Fan" motor DC resistance between the four heads, the four thread compiled on the number 1,2,3,4. The smallest with a multimeter ohm, a pen then in the 1st line, were used to measure "Small Cooling Fan" on the motor one pair 2,1 3,1 on the 4th line of resistance, make a record, then a pen then in Line 2, respectively, for measuring resistance two pairs 3,2 4,2 2-on-1 equals one pair, and make a record, then a pen then in the 3rd line, measuring three pairs of resistors 4. The other three heads of the other three resistors and two resistors and three other heads of the three heads of the resistance and the resistance of the other three head comparison of one pair of the four pairs. "Small Cooling Fan" motor that maximum resistance value, is to connect the power cord to the one, the other three lines with which roots can take power, but nothing different speed.