I'm installing a multi-display audio unit and does any one know where to pick up the reverse and parking brake signal wires so the backup display and DVD play back will work?

2001 C4

thanks,

 

I put mine right under where the shifter is. I bought a bypass kit and i think all it really needed was a good ground. Use a test light to find a good ground spot. I ran my reverse wires from the real tail lights to the head unit. Bought a $12 license plate reverse camera from amazon and it works great.