Which year was the diagnos connector introduced? (fx. for gear indicator)

[SpongeBob]

I've used the +ve (Orange/Blue wire) of the connector: it's switched, has it's own fuse, can easily be connected/disconnected... and the fan never kicks-in anyway:-) Works like charm for years.

[froudy]

Orange wire under the fusebox maybe? that's the one I always use.

@Hooli
Yes I remember now..It was that one I hooked into