Ok so I did this mod. Got a 2014 wheel on a 2007, have changed the clock spring and wired it. The earth is hooked up and I have three switch wires. Swithes illuminate.
1 runs the up/down station & volume (multi function on one wire),
1 runs a Display button (multi function on one wire).
1 runs the "mode" button. (single function wire)
I have differing resistances from the earth to the switch wires dependent on the button pressed. However when "programming" the botton on the head unit it automatically sees a "button pressed" on both of the two multi function switches but not the "mode" button which is a single function button.
Does any one have any knowledge of this - maybe I need to install resistors or something in the line? I have zero continuity across the switch to earth until I press a button - I am struggling to see how the wheel is getting a signal from the switch.
Cheers
Mal