Set Appliance State:
| Isolate Mains Power to appliance as per TOPs P4 |
Set Multimeter to Resistance 
Remove connector X22 from the PCB
Disconnect the electrical connector from the pump (speed control)
Disconnect the electrical connector from the pump (speed control)
Measurement:
Measure the resistance between each of the pins on X22
and the pump speed control connector as listed below:
Expect continuity / zero resistance on each wire.
Note:
Ensure a good connection is made and that the orientation of the pump speed electrical connector is as shown or misdiagnosis may occur.
and the pump speed control connector as listed below:
| Connector X22 | Pump speed control | Brown | Pin 1 |
| Blue | Pin 2 |
Expect continuity / zero resistance on each wire.
Note:
Ensure a good connection is made and that the orientation of the pump speed electrical connector is as shown or misdiagnosis may occur.
Isolate as per TOPs P4
and refit as necessary