Set Appliance State:
| Isolate Mains Power to appliance as per TOPs P4 |
Set Multimeter to Resistance 
Disconnect the inline plug from the flow sensor
| WARNING! - Mains voltage is expected during test follow TOPs P4 live testing procedure |
Measurement:
Measure for continuity (zero resistance) on each wire of the flow turbine harness.
Yellow to Yellow (marked 15.3) on X5
Black to Black (marked 15.2) on X5
Red to Red (marked 15.1) on X5
Expect continuity on each test.
Yellow to Yellow (marked 15.3) on X5
Black to Black (marked 15.2) on X5
Red to Red (marked 15.1) on X5
Expect continuity on each test.
Isolate as per TOPs P4
and refit as necessary