How do I Test a Dishwasher Pump Motor
Test the main pump motor using the proper wires. The largest wires, other than the AC from the house circuit, feed the heating element. Those would be the two large blue ones indicated in the question's image. Heating devices generally draw the highest current. The main pump motors leads come off the board to the right of the AC in lines. They are a dull blue color and easily visible in the questions image. There should be continuity through the wires with very little resistance. There should be no continuity through either wire and ground. This setup is very likely the exact same for many different Whirlpool dishwashers.