I just go a double din JVC headunit and just took out the stock one from my VZ and i cant seem to find out how to access the wires so i can connect the JVC to the car.
Would it be easier just to use and ISO cable to connect the new head unit instead of finding all the right wires to connect. The only ISO cable that i can find over has 2 connections to the car and the stock head unit had 3. Im assuming one of these is for the steering wheel controls and probably doesn't matter since the JVC head unit wouldnt be compatible with those controls.
you will also need a facia kit for the jvc unit otherwise it will have a big gap all round.
i find it easy to snap off all 4 tabs and than hot glue gun the facia on.
also get a ISO for it as it will make your life really easy.
with steering wheel controls (top plug), you an get a PAC system to work with it to keep your steering wheel controls