I was trying to help out another LOC member earlier with fitting a new double-DIN Panasonic DVD head unit (sorry don't have the model number) into his Altezza (no separate amp, so like an IS200 S).
The head unit wouldn't display video when a DVD was inserted, and I suspect that this was some sort of wiring issue. The instructions say that the wire labelled "Side brake" needs connecting up to the handbrake in the car. I presume that this is so that it will only play DVD video when the handbrake is applied (i.e. for safety reasons), and indeed the screen came up with a "Warning" message instead of showing the video.
The instructions also said that the handbrake circuit is grounded when the handbrake is on. So I wired this cable from the new head unit into the black ground wire in the Panasonic loom, assuming, this would go off via the various connectors to ground on the car and that this would fool the head unit into always being able to show the video.
However, this didn't seem to work, and exactly the same message (and lack of video) came up as before. Did I make an incorrect assumption here ? Or just mess it up in some other way ?