Hi all,

I have factory installed trailer hitch on my Audi Q7 4M, my 2016. Recently I retrofitted OEM anti-theft system and everything works well except trailer connection.
On my previous VW I also have OEM anti-theft system and if I disconnect electricity from the trailer when car was locked and anti-theft system activated, alarm horn were activated, but on Audi this doesn't happen. I assume that issue is in coding.

Can anyone help?

Thank you