Set Appliance State:
| Isolate Mains Power to appliance as per TOPs P4 |
Set Multimeter to Resistance 
Disconnect wires from Pump PCB
Measurement:
Test 1:
Measure between spades 1 and 2 on X1 at the pump PCB.
Resistance should be at least 1M Ohm.
Test 2:
Measure between the 2 pins of X2 at the pump PCB.
Resistance should be at least 1M Ohm.
Note:
Take care to refit X2 / X3 correctly - X2 goes to X1
on the main PCB and X3 goes to the selector switch.
Measure between spades 1 and 2 on X1 at the pump PCB.
Resistance should be at least 1M Ohm.
Test 2:
Measure between the 2 pins of X2 at the pump PCB.
Resistance should be at least 1M Ohm.
Note:
Take care to refit X2 / X3 correctly - X2 goes to X1
on the main PCB and X3 goes to the selector switch.
Isolate as per TOPs P4
and refit as necessary