Set Appliance State:
| Isolate Mains Power to appliance as per TOPs P4 |
Set Multimeter to Resistance 
Remove 7 way connector from the PCB
Measurement:
Test 1:
Measure the resistance between pins 4 (brown) and 7 (blue) on the 7 way connector.
Expect approximately 178 Ohms for standard pumps.
Test 2:
Measure resistance between pin 4 (brown) and a suitable earth.
Expect a resistance of 1MOhm or greater.
(O.L is acceptable as this is greater than 1MOhm)
Are the resistances measured as expected?
Measure the resistance between pins 4 (brown) and 7 (blue) on the 7 way connector.
Expect approximately 178 Ohms for standard pumps.
Test 2:
Measure resistance between pin 4 (brown) and a suitable earth.
Expect a resistance of 1MOhm or greater.
(O.L is acceptable as this is greater than 1MOhm)
Are the resistances measured as expected?
Isolate as per TOPs P4
and refit as necessary