Set Appliance State:

Isolate Mains Power to appliance as per TOPs P4
Set Multimeter to Resistance Set meter to measure resistance
Disconnect the plug from the pump
Remove safety clip to expose electrical connectors

Measurement:

Measure for continuity (zero resistance) on the live and neutral wires of the pump harness.
Measure from (refer to pictures):
Brown (pin 5) to pin furthest from cable on pump.
Blue (pin 6) to pin closest to able on pump.
Inspect harness and connectors for good overall condition.
Is the harness satisfactory?