Set Appliance State:
| Isolate Mains Power to appliance as per TOPs P4 |
Set Multimeter to Resistance 
Disconnect plug marked CON11 at the PCB
Measurement:
Check for continuity (zero resistance) between the red wire marked PL at the right hand terminal block to the red wire at the disconnected plug.
Check for continuity (zero resistance) between the black wire marked PN at the right hand terminal block to the black wire at the disconnected plug.
Inspect harness and connectors for good overall condition.
Check for continuity (zero resistance) between the black wire marked PN at the right hand terminal block to the black wire at the disconnected plug.
Inspect harness and connectors for good overall condition.
Isolate as per TOPs P4
and refit as necessary