Fitting Additional Horn Help Needed

[laticsforlife]

I have a Titanium, and have repeatedly moved an after-market horn from car to car, and now it comes to fitting in into my lovely new shiny Titanium.

My first is a note, my second a question.

First - the horn is pitiful and not very loud - BUT the daftest thing is where it is located. I was looking for it so I could work out which wire to connect to etc, and it isn't even pointing towards an outside area. It's located on the left of the engine bay (as viewed from the front) above where the spotlight housing is - quite useless in location. I suspect it'd be much louder if located near the grille somewhere (all they had to do is make a cutout.

Second - is the question - is the horn earth activated or positive activated? I know it has 2 wires and apparently if you connect a test bulb (which I don't have) and either wire lights up then its positive activated, if neither lights up then its earth activated.

If I can find the answer from someone who is technically minded, then it'll save me the outlay for a test light or a multimeter.

NB It's on a Mk7 2010 Fiesta.