How to Wire a 120V Dryer Motor for Use in Other Projects?
The motor circuit is probably something like the following diagram. The start circuit could include a centrifugal switch that opens when the motor reaches full speed. It may or may not include a series capacitor. It could be contained in an electronic control module. If there is a centrifugal switch it may have more than one contact. One contact may enable the heating when the motor reaches full speed. Manufacturers sometimes change configurations without changing the model number of the dryer. A replacement motor for a given dryer may not be the same as the original motor.