I changed out my Tape player (I know I know ) on my 99 Astra for a JVC KD-G611.
Unfortunately I lost the ability to control the player from the steering wheel so I bought a JVC Stalk Adapter
I have fitted it as below but the steering wheel controls still do not work.
Do I need to do something with the wires, all Ive done is plug the inputs into the ISOs as per the instructions?
Its a long shot, but here is a pic