Re: head unit power lead 02 gtv
I've been having problems with my battery draining recently so I wired my stereo to the ignition last weekend.
There's a switched live that feeds the cigarette lighter, so I used that seeing as I don't use it - and it works well.
It's not a major hassle to do, but you'll need to get the right one of the wires that goes to the lighter (there are 2, one power and one for illumination). Removing the lighter bit to find out was awkward.
Once you've done that, you can find the correct wire in the big bundle that is accessable from the drivers footwell (less a couple of screws) and run a wire from there to the right wire that goes into the car side of the ISO adapter.
Annoyingly for me, my battery is still running low after a few days!