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 main PCB
Remove the connection from the pump assembly

Measurement:

Test 1:
Measure the resistance between Pin 7 (Blue) on CN2 to the corresponding pin at the pump connector (refer to picture).
Expect continuity (zero resistance).
Test 2:
Measure the resistance between Pin 8 (Brown) on CN2 to the corresponding pin at the pump connector (refer to picture).
Expect continuity (zero resistance).
Also inspect the condition of the harness visually for general condition and any signs of damaged insulation.