Set Appliance State:
| Isolate Mains Power to appliance as per TOPs P4 |
Set Multimeter to Resistance 
Disconnect the plug from the pump
Measurement:
Measure for continuity (zero resistance) between each of the 5 wires, in turn, running from the X13 (rightmost blue and brown) and X11 (black and grey) to the pump.
Inspect the harness and connectors for good overall condition.
NOTE:
The fifth wire in the pump harness is an earth which terminates at the main earthing strip to the left of the PCB.
Inspect the harness and connectors for good overall condition.
NOTE:
The fifth wire in the pump harness is an earth which terminates at the main earthing strip to the left of the PCB.
Isolate as per TOPs P4
and refit as necessary