Does anyone have a wiring diagram for the large stereo plug? The previous owner of my car replaced the blown HK system with an ebay special and massacred the wiring in the process. When I first got the car I put a Pioneer system in it using the power wires that were used for the ebay system. I would now like to figure out which wire is for the dash lighting as well as the wires for the steering wheel controls so that I can get the head unit to dim when the headlights are turned on and possibly add a converter for the wheel controls. Almost all of the wires were cut and then pulled from the plug so I need to know the colors and not just where they were in the plug.
The car is a 2004 R50 Cooper with the Harmon Kardon stereo, 2 spoke steering wheel, and no navigation.

 

Check here https://www.newtis.info/tisv2/a/en/r...nctional-info/

 

That looks like a great reference however I am not seeing anything that would help me identify which color wire I'm looking for.

 

The wiring diagrams have wire colors. Sometimes you might have to click down to the module level to see them (the blue colored labels in the diagrams are hotlinks). Colors are German abbreviations: https://www.hitechcontrols.com/cable...eviations.html

For the back of the OEM headunit, see here.