GT86 AUX/VTR Video In
 

Hi,
I've got a EU GT86 with Toyota Touch&Go Navigation.

Would love to get some help with video-in on the AUX.
I've connected pin 25 (aux detection) to chassis ground and VTR mode is enabled. I do however have problems getting video to work. The video screen is just blue. showing no real signal.

What is the correct way to connect the Video In cable. Currently I have the positive pole/center at pin 13 and ground at pin 27. I have tested multiple combinations (with pin 13 signal, pin 14 as video ground and vice versa).

Have tried with a Raspberry Pi in both forced NTSC and forced PAL mode.

Any suggestions? What is the correct video pins supposed to be?