What's the deal with electric motors?

[richardcrane]

[I'm updating this in the hope someone will see it and be able to offer a suggestion. Thanks!]

I was able to clear my bench and start working on the sander. Had to disassemble quite a bit to get to components. Have a short video at https://www.flickr.com/gp/34675720@N04/A4ib04 showing parts. I'm guessing the black component at the top is a capacitor? I checked continuity of power cord which is good. I tried testing the switch and it appears that it's open across all possible 2 terminal combinations when in both "off" and "on" positions so possibly it is the failed part. Can I temporarily jumper it to check? Can you tell from the picture ("on" is up) what connections to make?

There are no markings on the switch that I can see.