Wondering if there is a piece that will convert 12 DC to the multiplexed signal and vice versa. I don't feel like running extra wires to the DC motors directly.... also to the sunroof. Maybe someone has a circuit design or even the circuit for the body module.

Here is what I would like to achieve. When I lock/arm my car I would like to be able to rollup the windows and close the sunroof. Also additional trigers to open them.

Any help would be great... or previous experiences.

Spiky