Set Appliance State:

Isolate Mains Power to appliance as per TOPs P4
Set Multimeter to Resistance Set meter to measure resistance
Remove X14 pump connector from the PCB
Disconnect plug from the pump

Measurement:

Measure for resistance across each wire of the pump harness,
pins 1, 2, 3 of PCB connector to the corresponding pins on the pump connector.
Expect continuity / zero resistance on each wire.
Also visually inspect the harness for good general condition.
Are the resistances as expected and is the harness in good condition?
Note.
Ensure a good connection is made as misdiagnosis may occur.