Set Appliance State:
| Isolate Mains Power to appliance as per TOPs P4 |
Set Multimeter to Resistance 
Disconnect X7 from the display PCB
Remove the connector from the low pressure sensor
Remove the connector from the low pressure sensor
Measurement:
Measure the resistance of each of the wires on connector X7 (Pins 3, 4 and 5) the wire of corresponding colour at the pressure sensor connector.
Expect continuity / zero resistance on each test.
Also visually inspect the condition of the harness and its connectors.
Expect continuity / zero resistance on each test.
Also visually inspect the condition of the harness and its connectors.
Isolate as per TOPs P4
and refit as necessary