Set Appliance State:

Isolate Mains Power to appliance as per TOPs P4
Set Multimeter to Resistance Set meter to measure resistance
Disconnect inline connector to sprayaway pump
Disconnect X11 from the PCB

Measurement:

Check for continuity (zero resistance) between
both the brown and blue wires that run
between the pump and the PCB.
Inspect the harness and the plugs for good overall condition.