Set Appliance State:

Isolate Mains Power to appliance as per TOPs P4
Set Multimeter to Resistance Set meter to measure resistance
Unplug the electrical connector from the pump assembly

Measurement:

Measure the resistance between the 2 black wires on
connector CN22 to the 2 corresponding black wires on
the pump connector.
Expect continuity / zero resistance on each test.
Also visually inspect the condition of the harness.