Set Appliance State:
| Isolate Mains Power to appliance as per TOPs P4 |
Set Multimeter to Resistance 
Remove connector CN2 from the interface PCB
Remove the connection from the pump assembly and position in the orientation shown (follow instructions on the connector)
Remove the connection from the pump assembly and position in the orientation shown (follow instructions on the connector)
Measurement:
Measure the resistance between connector CN2 and the pump connector as below.
Expect continuity on each test.
Also visually inspect the condition of the harness for general condition and any signs of damaged insulation.
| Connector CN2 | Pump connector | Pin 1 (Red) | Pin 3 |
| Pin 2 (Black) | Pin 2 |
| Pin 3 (Blue) | Pin 1 |
| Pin 4 (Brown) | Pin 4 |
Expect continuity on each test.
Also visually inspect the condition of the harness for general condition and any signs of damaged insulation.
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Isolate as per TOPs P4
and refit as necessary