Need a wiring diagram for my car?!

[Tom]

Right having a few issues with this.

Basically i have figured out via proding and poking that earthing the orange wire shown below locks all the doors:


Awesome i hear you say, yes halfway to a working system but, now i cant get the doors to unlock via the wire i thought i also had to earth to make it unlock. But then i had a look at the wiring diagram again:


Now if you divert your attention to the upper left of this diagram:


You will notice it says:
Green wire "- lock" "+ unlock output"

It then says,
Blue wire "+ lock" "-unlock output"

So does that mean the unlock wire needs a positive feed to unlock? Because the lock wire uses the negative/ground?