currently in the process of installing a new headunit into my caldina GTT.
i found snwtoy's diagrams in another thread

however when I connected the constant power/ground/accessories power wires to the corresponding wires on my head unit I get no power, now I know the new head unit is definitely working as I connected it directly to the battery, and the old cd/md player was working when I took it out, is this diagram definitely correct? Any other reasons as to why it wouldn't be working?
any help is much appreciated
cheers
will