Hi lads... need some help on this one.

Original Symptom:

1) Vehicle would not crank

Investigation:

1) Battery Good at 12.6 Volts

2) 12V available at starter motor and solenoid

3) Powertrain Control Module wakes up - no DTCs

4) PATS - Indicates normal

5) Glow Plug Fuse Blown - Ignored for now

6) All expected relays operational

Attempt 1

Action: Applied 12V straight to starter motor solenoid while turning key

Result: Starter actuator dead

Action: Removed Starter Motor, cleaned up terminals, applied 12V to motor and solenoid

Result: 12V direct to starter solenoid and motor

Action: Obtain replacement starter motor - apply 12V to motor and solenoid

Result: Actuator function and motor works

Action: Fit new starter motor, clean terminals, check wiring, check continuity throughout from ignition switch, through fuses, through relays, checked grounds - all clean.

Did find that ignition Switch was providing intermittent function when in position 3

Attempt 2:

Action: New ignition switch, check continuity, 12V supply, grounds, fuses - all good

Results: Rock solid supply of 12V when in position 3, PCM awake, PATS is normal still no crank from position 3 key turn.

Action: Feed 12V to starter directly when turning key will crank engine but no start.

Any ideas?