TM2 Engine watchdog oil pressure function

[robbotd5]

G'Day all.
I've searched and I cant find what I need so here goes. What wire do I need to tap into on the oil pressure switch to enable the audible "low oil pressure audible alarm that comes on with the light" function on the TM2 engine watchdog? On my TD5, there are two wires, white one with a reddish/brown stripe and a black wire. Which one?
Thanks in advance
Regards
Robbo.

[LandyAndy]

Robbo
The oil light in my D2 has never worked,except when the engine is washed or I splash thru a big puddle.The wiring is damaged somewhere.Hopefully its rectified whilst she is in hospital.
In light of this I would get a brass adapter and run a seperate oil pressure sender for the Watchdog.VDO have them.BEWARE early and late TD5s have different senders.1 is parralel thread the other tapered,same diameter.Without going and finding 1 of the several senders Ive replaced,I think its the early are parralel.
Andrew