Hi Anthony, Thanks for your reply, No fault codes for this and cant seem to find the relevant live data for it either.

From what i can see, the steering wheel buttons are on a LIN style network to the steering column module, and then the steering wheel control module translates this to communicate on the relevant can networks.

im sure we are meant to have at least 12v on one of the wires if it does run on a LIN style network, as surly the switches need a power supply to function and send digital messages?