In trying to narrow things down we tried this test on the wiring plug
where it attaches to the motor.. I am not sure the link will post okay..
he tells you to set the meter to dc v 20 .....ours has 10 ,50 ,250... so i set it to 10 and increased the voltage buy turning the red wheel on the side of the tester so as to set it to about 20 volts.
Our tests seem to suggest the wiring is okay but this guy in the video may or may not know what they are doing.. same with us lol
It still might be the thing to do as far as replace the switch..