Hi Andrew,
Maybe a silly question but I'm not the most handy of persons.
I'm trying to do the same (ie add a sub) but cant figure out how to gain access to the cigarette lighter pink wire? Do you have have to remove any of the facia bits? You say you ran the smaller wire up through the dash behind the glove box.... but from there I am lost as I see no way of getting to the lighte insides without removing bits of facia or center console.
Any tips welcome.