Set Appliance State:
| Isolate Mains Power to appliance as per TOPs P4 |
Set Multimeter to Resistance 
Remove the connector from the Aqua sensor
Remove connector X2 from the PCB
Remove connector X2 from the PCB
Measurement:
Measure the resistance of each of the wires in the harness to the Aqua Sensor as stated in the table below.
Expect continuity on each of the wires.
Also visually inspect the harness for good general condition.
Note:
Each pin on the PCB connector is numbered.
| Pin on connector (X2) | Aqua Sensor Connector | 3 (Red) | Red |
| 2 (Black) | Black |
| 6 (Green) | Green |
Expect continuity on each of the wires.
Also visually inspect the harness for good general condition.
Note:
Each pin on the PCB connector is numbered.
 lower section.gif)
 pcb in situ.gif)
 connector x2.gif)
Isolate as per TOPs P4
and refit as necessary