Set Appliance State:

Isolate Mains Power to appliance as per TOPs P4
Set Multimeter to Resistance Set meter to measure resistance
Remove connector CN2 from the PCB
Disconnect electrical connections at pump

Measurement:

Measure the resistance (continuity) across the pump harness leads.
Connections are;
CN2 pins 1 & 4 to the corresponding connection at the pump wiring.
Expected resistance is continuity (zero resistance) across each wire of the harness.