I'm attempting to integrate a tv tuner into the DVD roof mounted head unit and need to know the pin-outs for the big plug connector on the unit to sparate out the audio in/out, video and 12V +-.

hello,
try this site
http://www.epinions.com/elec-Car_Stereo?sp=iother

or this one
http://www.caraudiomag.com/

good luck

Here you go, this might help you out!

Good luck, and I hope it helps you! :)

http://www.kosmix.com/autos/Lexus_wiring_diagrams/out-goog--autos--sb-s