Set Appliance State:

Isolate Mains Power to appliance as per TOPs P4
Set Multimeter to Resistance Set meter to measure resistance
Remove connector CN09 from the PCB
Disconnect the electrical connection from the pump assembly

Measurement:

Test 1.
Measure the resistance between pin 2 on the
pump connector and pin 3 on connector CN09.
Test 2.
Measure the resistance between pin 3 on the
pump connector and pin 4 on connector CN09.
Test 3.
Measure the resistance between pin 4 on the
pump connector and pin 1 on connector CN09.
Test 4.
Measure the resistance between pin 1 on the
pump connector and pin 2 on connector CN09.
Expect continuity / zero resistance on each test.
Also visually inspect the condition of the harness.