Ok so stil working on this and not getting anywhere really. at least i have a multimeter and a suspected culprit.
Here is a picture of the relay that the above nissan 720 article is relating to (BTW if anyone has a FSM for a non injected Z24 i would really appreciate it).
I measured the voltage in at all the ignition positions and came back with this
Colour Running (v) On (v) Accessory (v) Off (v)
White -0.02 0 0 0
White Red 15.4 12.6 12.6 12.6
Yellow 15.4 12.6 12.6 12.6
White Black 0.34 <10* 12.6 12.6
White Blue 0.38 <10* 12.6 12.6
Black 15.4 12.6 12.6 12.6
* these numbers were continually running down, should have checked them before i started it but i didnt.
I checked continuity from the white wire to the ignition switch at it was ok.
below is the diagram, presumably of the same relay but in a 720 as that is what the article referred to.
My electronics are all working fine except for 2 things:
1)Most of the time the key won't shut off the engine. I have to bring it to bite point, turn off the key and then hit a killswitch (that i have no idea how it functions)
2)Battery light is always on in while the engine is running.
If anyone can help point me in the right direction towards fixing either of these i will be eternally grateful. Thanks Terranovation for setting me on the right path.