Whirlpool TCO replaced once

The Dishwaser looks dead, replaced TCO and it started working. However it looks like it failed again. As with any fuse the problem typically lies somewhere else as the fuse is for safety.

What part should I start checking. The pump drains the water if I short our the TCO with a nail.

The tub is full of water and the soap dispenser is not open.

Could it be the main motor? How do I test with out blowing a dozen fuses looking for the bad part?

Thanks for you help and advise!:confused: