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

Measurement:

Measure the resistance (continuity) across the pump harness leads:
Connections are;
CN2 pin 4 (brown) to the connection marked L at the pump wiring.
CN2 pin 1 (blue) to the connection marked N at the pump wiring.
Expected resistance is continuity (zero resistance) across each wire of the harness.
Inspect harness and connectors for good overall condition.