Do you have NAV and DSP?

Sounds like you posted two potential solutions.

The first one-- How do I figure out which cable will turn on the amp and where should I look? What factory cable are you referencing? Where is nr. 16 amp connection?

The second---Number 5 wire in front is clear. Where is the auto ant wire in the rear? The only blue/white wire is in the original factory harness.

To all following: I am sure of this---don't cut any wires, disconnect wires from a connection or install the IBUS app or wire it in before you get the Seicane unit up and running with sound. Make no permanent connections until all is tested. Run the Seicane harness over the seats until all features of Seicane unit have been tested and are working properly. Once I get the unit up and running I will drive it for a week or so with temporary setup, then install the DVD player and back up camera. Only then install the and connect the IBUS. I am going to drive it for a another week to make sure everything continues to work. Only then will I hide the harness and do permanent connections.

If at all possible work with someone here that has the same factory options. In my case Nav and DSP. Thus far Seicane input and stock install directions have been useless.

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X5 4.6 2002 Black Sap, Black interior. 2013 X5M Melbourne Red, Bamboo interior
Dallas