If you ever need to connect an aftermarket amp to your head unit, it might be useful to know the pinout of the amplifier which you will find behind the carpet trim on the left hand side of the boot.
Here is the diagram I drew. The view is looking into the end of the disconnected plugs, the one on the left goes into the black socket of the amp, the one on the right goes into the white socket. Between them you will find a 10 amp blade fuse.
My name is Jon Evans, I used to be quite active in the BMW 7 Series (E32) community, as I owned a 735iL, and I have a lot of information available in the BMW Repairs section of the site.
Since August 2004 I've been driving a Lexus LS400 Mk. IV. I have a Lexus Repairs section, but it is fairly empty because nothing much seems to go wrong with it.
I live in Banbury, UK, with my wife Heidi and children James and Matthew.
You can email me at jon.evans@pobox.com
These people are not me. I found them using Google.
Are you also called Jon Evans? email me and I'll add a link here for you.