Pretty much no button these days directly controls something, it’s routed through the BMS. Headlights may be one of the few that are switched without some type of computer in between, possibly power windows too?
Even so, each individual button needs to be connected to that PCB separately, and will only have the function of what it says on the button, or possibly a couple hidden functions through programming.
Touch screens are essentially one connection for infinite buttons with different screens and menus.
Routing wires for buttons is an absolute clusterfuck as well.
Pretty much no button these days directly controls something, it’s routed through the BMS. Headlights may be one of the few that are switched without some type of computer in between, possibly power windows too?
And they’re all on a PCB.
Even so, each individual button needs to be connected to that PCB separately, and will only have the function of what it says on the button, or possibly a couple hidden functions through programming.
Touch screens are essentially one connection for infinite buttons with different screens and menus.