Set Appliance State:
| Isolate Mains Power to appliance as per TOPs P4 |
Set Multimeter to Resistance 
Remove connector X4 / X7 from the PCB
Measurement:
Measure the resistance across each of the wires on the incoming harness as follows:
Pin 4 on X4/X7 to terminal 2 on the incoming terminal strip.
Pin 5 on X4/X7 to terminal 5 on the incoming terminal strip.
Pin 6 on X4/X7 to terminal 4 on the incoming terminal strip.
Pin 8 on X4/X7 to terminal 3 on the incoming terminal strip.
Expect continuity / zero resistance on each test.
Also visually inspect the condition of the harness.
Are the resistances measured as expected and is the harness in good condition?
Note:
Use the numbering as identified in XSol not the numbers that may or may not be present on the terminal strip.
Pin 4 on X4/X7 to terminal 2 on the incoming terminal strip.
Pin 5 on X4/X7 to terminal 5 on the incoming terminal strip.
Pin 6 on X4/X7 to terminal 4 on the incoming terminal strip.
Pin 8 on X4/X7 to terminal 3 on the incoming terminal strip.
Expect continuity / zero resistance on each test.
Also visually inspect the condition of the harness.
Are the resistances measured as expected and is the harness in good condition?
Note:
Use the numbering as identified in XSol not the numbers that may or may not be present on the terminal strip.
Isolate as per TOPs P4
and refit as necessary