Set Appliance State:
| Isolate Mains Power to appliance as per TOPs P4 |
Set Multimeter to Resistance 
Disconnect terminal X22 from the PCB and the lead from the Hall sensor
Measurement:
Measure the continuity (zero resistance) of each of the wires to the hall sensor.
Note.
Harness colours may change, but test points remain the same.
Note.
Harness colours may change, but test points remain the same.
Isolate as per TOPs P4
and refit as necessary