Hey dude !
Im assuming that your installing this on your XF ???
If so, then there is no smartlock module, or BEM to worry about, (Unlike the Newer models :crazy1: )
Anyway, the Door trigger is negative on your model.
I cant remember the circuit exactly, (I installed the same thing on a VK Calais, and modded the circuit a little so as it would work with an alarm), But I think that all you need to do with the Jaycar cct is connect to
consant power, (Eg Interior lamp fuse),
Ground (Can be chassis etc),
and one door switch.
Thats is it ! Very sweet little cct. I must add.
While you are at it, check out underneath the floor wells for the front seats, (where you place your feet). You may notice that there are holes that you can place further bulbs/bulb holders, that were available for Fairmont Ghia's etc.
Bulb and holder should not cost you any more that $3.00 each from a wrecker, and make the car light up very nicely !!!