I have the complete wiring diagrams for 1994 and 1996 at200 and st204. And they seem to be the same. Do anyone know if these would apply for the st205 as well? Except for the ECU of course.

If you're looking for ST205 specific wiring diagrams, you can grab the repair manuals here, and they are usually the last pages of the PDF file. I'm sure there might be some differences here and there, but just as many similarities. I've just referred to the ST205 books for any electrical info for what I've worked on so far.

I found what i was looking for on the bottom of the repair manual, there were som small differences compared to the at200 and st204. Thank you!