Set Appliance State:

Isolate Mains Power to appliance as per TOPs P4
Set Multimeter to Resistance Set meter to measure resistance
Remove the connector from the pump assembly
Remove the pump connector from the PCB

Measurement:

Test 1:
Measure the resistance of the brown and pink wires from the PCB connector to the pump connector.
Expect continuity / zero resistance on each wire.
Test 2:
Measure the resistance from the green wire at the pump connector to a suitable earth.
Expect continuity / zero resistance.
Test 3:
Visually inspect the condition of the brown, pink and green wires in the harness checking the condition of the insulation and that is no evidence of short present.