Set Appliance State:
| Isolate Mains Power to appliance as per TOPs P4 |
Set Multimeter to Resistance 
Disconnect the diverter valve head
Measurement:
Test:1
Measure the resistance between the blue and black wires on the diverter valve connector.
Expect 0.9 MOhms or greater.
Test:2
Measure between the brown and blue wires.
Expect 1 MOhm or greater.
Measure the resistance between the blue and black wires on the diverter valve connector.
Expect 0.9 MOhms or greater.
Test:2
Measure between the brown and blue wires.
Expect 1 MOhm or greater.
Isolate as per TOPs P4
and refit as necessary