You can use a set of probes in series with a 100 watt incandescent bulb as a “poor man’s megger” to roughly check insulation. Of course everything needs to be appropriately insulated for this!

Remove the motor from the washing machine and place it on an insulating surface.

Put one probe from your light bulb on a motor terminal.

Put the other probe on the frame of the motor.

The bulb should not light up.

Repeat for various motor terminals in case there are different windings/etc.