Hello All,
I'm having a dashboard for J Astra at my desk and I want to do some experiment with it. I figured some pins in the connector:
16: GND (black)
26: LS CAN (green)
27: LS CAN (green)
31: Ignition 12V (green-purple)
32: 12V (red-yellow)
I made it work and I see lots of errors (obviously) in the red screen. Unfortunately I don't know how is the steering column left hand switch (that you use for indexing, turn on high beam etc) is wired to the IPC? It also has the buttons to navigate yourself in the IPC menu so I suspect those cables go directly to the IPC. I don't have any wiring diagram unfortunately (I'm an enthusiast amateur, not professional).

Is there anyone who can tell me how these buttons work (e.g. add certain resistance to certain pins)? I'd like to DIY the buttons so I can use the menu at my desk.

Thank you!