Set Appliance State:

Isolate Mains Power to appliance as per TOPs P4
Set Multimeter to Resistance Set meter to measure resistance
Remove Connector X6a from PCB
Remove Capacitor/plug from Pump

Measurement:

Test 1:
Measure the resistance between pin 4 on connector X6a and pin 4 on the pump connector
Expect continuity / zero resistance.
Test 2:
Measure the resistance between pin 5 on connector X6a and pin 1 on the pump connector
Expect continuity / zero resistance.
Also visually inspect the condition of the harness and its connectors.
Are the resistances measured as expected and is the harness in good condition?