Quote Originally Posted by twisted View Post
Hi all just got 2018 y62 interested in this alternator chat how do you dissconect the smarts of this alternator
On the -ve Battery Terminal there is a Shunt assy that sends the smarts to the ECU
There is a grey plug immediately below the Shunt IE it is between the Battery and the Fuse Box.
Simply disconnect that plug (you may need to remove the terminal for ease of access).

https://www.youtube.com/watch?v=EDP0NBK5i54

You can put a small placcy bag over the plug or tape wrap it or whatever to stop dirt or corrosion happening if you wish.