Welcome!
Check out the link in the third post in this thread. May be a good start. Not saying it is inclusive, just a start.
http://forums.pelicanparts.com/porsche-911-technical-forum/689519-strange-headlight-turn-signal-interaction.html
I have the diagrams but my printer cartridge holder is balking at accepting a new one and it renders my scanner inoperative. Will take another whack at fixing and report back. Don't get excited.