The customer complains that although the fan blower motor operates well in low- and medium-speed positions, it runs slow in the high-speed position. A look at the wiring schematic in Figure 13-47 for...

The customer complains that although the fan blower motor operates well in low- and medium-speed positions, it runs slow in the high-speed position. A look at the wiring schematic in Figure 13-47 for the circuit indicates that the resistor block does not control high-speed operation. Because the motor operates properly in low and medium speeds, the fault is not in the motor or the power supply feed. By examining the schematic, the only place that there could be resistance in the high-speed circuit is at the switch wiper or in the circuit between the switch and the resistor block. A voltage drop test confirms that the location of the resistance is the connector to the switch.