Models with a thermostat that it is surcrue to the tub and there is continuity throught it. Continuity is checked with a ohm meter or a continuity tester to see if current will pass through a switch. Dishwasher will not drain. Check for hose kinks or food plugging drain hose. Check garbage disposel port hole for hose from air gap, clean out.
Check pump motor for reversing during the pump out.
Dishwasher will not run at all. Check connections from power cord to terminal block. Check Check door switch for action and continuity. Check power at outlet Should read 110-volts. Check the timer for power.