I was thinking more in the lines of this:
Connect the ign of the car to the ign of the screen. Power the 12V through the M1. Hook up the J8 to the open/close button. IMO this will do the following:
- Ignition of the car powers on the screen and the M1. J8 will be triggered(I think immediatly) to open and close the unit. However because the unit hasn't had time to power on fully, the J8 will do nothing ==> problem.
- When the key comes out of the ignition, J8 will be triggered and the unit will close. A few seconds after that(depending on settings of M1) the power will be completely cut ==> Lights and clock are out, screen is retracted ==> ok.
To overcome the first problem I was thinking of one of those things that delay a signal. As you can see I'm not in any way electrically gifted, this is purely deducted from logic and your own post with the explanation. If you could point me to "one of those things that delay a signal" that would be a great help and then I might consider to do it.
If anything in this post doesn't compute, or there is no such thing as "one of those things that delay a signal" then I don't mind pressing the button of the screen . At least the retracting and the power cut will work.
Edit: I think my car has different ingition lines, if I can find one for the screen that is triggered before the ignition of the M1 then I'm in the clear.
< Of to find detailed schematics of the car>.