I have a 2004 vectra with the three buttons each side on the steering wheel which I believe makes it half canbus.
I've got a TV,DVD,SAT NAV HU to fit, which comes with a connector with four wires for the steering wheel controls:- white wire marked AD,red wire marked AD,blue wire marked +5V and a black wire marked GND.
Can someone please tell me where I connect these to, so my buttons work. Cheers.