The following may help
http://www.applianceaid.com/wp-motors.html
You could hook it up to a line cord and try it.
Wiring diagram in the parts shows connections 1 to 2 (purple to white wires)
I would try using resistance to check the windings first.
1 to 2 should measure a couple ohms.
I am assuming that you checked the thermostat (Fuse) (Item 5 in Section 4).
This is the only one that will effect the motor.
Also that you disconnected one side of it when measuring it as this prevents you from reading an alternate/parallel circuit path.