Set Appliance State:

Set Multimeter to Resistance Set meter to measure resistance
Isolate Mains Power to appliance as per TOPs P4
Remove all the wires from the pump assembly.
Remove connector CN11 from PCB

Measurement:

Measure the resistance of all the wires in the pump harness from connector CN11 to the corresponding wire on the pump wires.
Expect continuity on each of the wires in the harness.
Also visually inspect the condition of the harness.