Set Appliance State:
| Isolate Mains Power to appliance as per TOPs P4 |
Set Multimeter to Resistance 
Remove connector X12 from the PCB
Remove electrical connections at pump
Remove electrical connections at pump
Measurement:
Measure the resistance across each of the wires of the pump harness between pins 16 (brown lead), 17 (blue lead) X12 connector and the pump electrical connections.
Expect continuity / zero resistance on each wire.
Expect continuity / zero resistance on each wire.
Isolate as per TOPs P4
and refit as necessary