Set Appliance State:
| Isolate Mains Power to appliance as per TOPs P4 |
Set Multimeter to Resistance 
Disconnect connector X16 from PCB.
Measurement:
Test 1:
Measure the resistance of the pump and harness across connections 1 (blue) and 2 (brown) at the disconnected connector X16.
Expected resistance 170 Ohms or greater.
Test 2:
Measure the resistance across connection 2 (brown) and a suitable Earth.
Expected resistance greater than 1 MOhm.
Measure the resistance of the pump and harness across connections 1 (blue) and 2 (brown) at the disconnected connector X16.
Expected resistance 170 Ohms or greater.
Test 2:
Measure the resistance across connection 2 (brown) and a suitable Earth.
Expected resistance greater than 1 MOhm.
Isolate as per TOPs P4
and refit as necessary