Ok I might just have found the source of my problem, please confirm:

The Yellow sled wire connected to constant 12-volt power source. (The one with the external fuse attached) goes to pin NR 1 the one on the very left ->NOT Pin 8 right?

As mentioned above, I might have mistakingly soldered the 12V yellow wire to the Pin Nr 8 which, according to the FAQ belongs to the serial cable. (Which the previous owner must have removed.)
I pray that this mistake did not cause any harm to my most precious piece of equipment...
There was much interference also, which I believe came from having the 12V power from the ignition only. Would also explain the loud click noise, while turning off ignition. And ofcourse the missing standby functionality.

Anyhow, I tested the serial connection on my PC (without harness / sled) ->Working connection on serial...
No sound distortion on L/R audio cinch ->while attached to my home stereo...

I might just got lucky on this one ;-)


IF ONE COULD CONFIRM THAT THE YELLOW, CONSTANT 12V SOURCE GOES TO PIN 1?! That would be great!

I'm a bit scared to solder the 12V source to the wrong PIN and fubar the whole thing in the process...

Cheers KeN