Set Appliance State:

Isolate Mains Power to appliance as per TOPs P4
Set Multimeter to Resistance Set meter to measure resistance
Remove high voltage connector to pump, With the aid of a screwdriver carefully remove the cover (as illustrated)

Measurement:

Measure the resistance (continuity) across the pump high voltage harness leads.
Connections are;
X2 connector pins 2, 3 & 4 to corresponding connection on the pump connector.
Expected resistance is continuity (zero resistance).
Note.
Ensure a good connection is made or misdiagnosis will occur, connector & pin numbers are printed on the PCB.