The signals to the LEDs pass 74/503, which is a 22-pin gray connector at the tunnel console.
The current limiting resistors are built-in inside the Four-C switch unit, so if you just connect the LEDs in to poles 18, 19 and 20, smoke will emit. There's also one additional forward voltage drop inside the switch unit, before returning to pole 16.
Pole 17 connects all three switches, pole 15 another LED, which I presume is the symbol lighting in the switch unit.
The previous generation of V70 had these switches more visible, but the general dashboard design in this generation doesn't allow for that.
|