Aftermarket Reverse Camera

[sharp738]

Hi all,

I've been trying to fit a reverse camera to my T6.

I bought this loom;



and have enabled the reverse camera with carista.

I believe when i select reverse I should get 12v from the red (ACC) cable but there is nothing...

The screen on my MIB2 looks pretty much the same as before using carista, it just shows the front and read sensors.

I followed a wiring diagram from another thread (minus the purple connections)



I'm trying to figure out if the problem is coding or something wrong with wiring if anyone can offer any advice?