When testing a standard AC electric motor, should there be 120 V between the brushes and the stator's wiring?
are you sure its AC? i have never seen an AC motor with brushes.... that's usually DC... either way you should check resistance (ohms) from the hot and neutral and have continuity... usually pretty low depending on the size of the motor... then check for continuity between the hot and the frame of the motor... should be open or then it would be grounded and bad... if you have an open between the hot and neutral either the motor windings are bad or you need new brushes. it is best to disconnect the wiring to the motor directly at the motor junction box to isolate the motor.... if you were to check for continuity at the disconnect and have a broken feeder wire it may make you suspect the motor when it really isn't. you can check the hot wire to the brush, and from where the brush makes contact to the neutral for continuity also
