Set Appliance State:
Set Multimeter to Resistance 
Isolate Mains Power to appliance as per TOPs P4
Remove 6 wire connector from X6 on PCB
Remove 6 wire connector from X6 on PCB
Measurement:
Test 1:
Measure the resistance between pins 7 and 8 at the 6 wire connector removed from X6 on the PCB.
Expect approximately 78 ohms.
Test 2:
Measure the resistance between pin 8 and a suitable earth.
Expect a resistance of 1 MOhm or greater.
Are the resistances measured as expected?
Measure the resistance between pins 7 and 8 at the 6 wire connector removed from X6 on the PCB.
Expect approximately 78 ohms.
Test 2:
Measure the resistance between pin 8 and a suitable earth.
Expect a resistance of 1 MOhm or greater.
Are the resistances measured as expected?
Isolate as per TOPs P4
and refit as necessary