Aux port addition to Uconnect radio

[Boxer250]

Hi -

Been trawling the internet to try and find out some information on the VP2 radio, (52 pin connector) and I was led here where it appears the members are rather knowledgeable about retrofitting parts to the installed radio (In car apple TV anyone..)

Anyway, I have a fiat boxer (RAM Promaster) with a VP2 radio which I would like to retro fit an aux port to for the Carplay device I have. I have aquired the box required (USB port, aux in port) andhave deciphered the pinouts to a certain extent.

My question is regarding the "DET in" pin. on older models you simply looped the DET out and DET in together, but every pinout I come across there is no DET out. The module I have for connecting the aux lead to has 6 wires. Red, white, green and black, and 2 additional wires, Yellow and black. Im hoping someone who has done something simialar can identify what connects to what.



Thanks in advance

Boxer

 

[Boxer250]

Little update

the white/green/black wires correspond to tip/ring/sleeve of the 3.5mm input.
The yellow is for the hub LEDs
Leaves the red and black which I presume are for Aux detect.

Pin 17 on the back is at 3.2v not connected. If I connect it to the red wire of the hub, the voltage drops to 1.6v. When I connect a 3.5mm source, it rises back to 3.2v. I have no idea where the black connects. And Im still not getting the aux option.

Anyone shed any light?