Using the onboard screen of an opel vectra
I'm driving an opel vectra, one of the reasons why I chose it, is because it has a dot matrix screen (black/yellow, not colored) already on board.
While I would like it to retain it's existing function, I would also like to put my own content on there, using a computer I'd like to install somewhere under the hood.
I haven't 'opened' anything to see how the wiring goes, but perhaps one of you already has, and would know if it is possible to give it another input source of your own choice.
Any ideas ?