Set Appliance State:
| Isolate Mains Power to appliance as per TOPs P4 |
Set Multimeter to Resistance 
Remove the connector from the pump assembly and CN302 from the PCB
Measurement:
Measure the resistance of the wiring harness from the pump connector to connector CN302.
Pin 1 (blue) CN303 to pin 2 pump connector
Pin 3 (brown) CN303 to pin 1 pump connector
Earth connection (earth terminal block) to pin 3 pump connector.
Expect continuity / zero resistance on each wire.
Also visually inspect the condition of the wiring and connectors.
Note.
Ensure a good connection is made during resistance tests.
Pin 1 (blue) CN303 to pin 2 pump connector
Pin 3 (brown) CN303 to pin 1 pump connector
Earth connection (earth terminal block) to pin 3 pump connector.
Expect continuity / zero resistance on each wire.
Also visually inspect the condition of the wiring and connectors.
Note.
Ensure a good connection is made during resistance tests.
Isolate as per TOPs P4
and refit as necessary