Thanks Bill,
I guess the common voltage distribution point is the the place where 4 cables meet under the dash (don't really know which ones they were).
If so, i'm not really excited to put a wire back there. I recently replaced all the wires and put those cable in a little box which connect different cable together (don't know how its called). I will need to remove all the clocks on the dash to put that cable in. But I will think about it
