US spec ETM's BMW Wiring Diagrams ,Almost all files are in Adobe PDF format, or as a ZIP file containing a PDF. Most of the files are big, like ten megabytes and upwards

E23 1982 to 1986 7 Series
E24 1983 to 1989 6 Series
E28 1982 to 1988 5 Series
E30 1983 to 1992 3 Series
E31 1991 to 1995 8 Series
E32 1987 to 1993 7 Series
E34 1988 to 1995 5 Series
K1100 1992 to 1997 K1100 motorcycle
https://shark.armchair.mb.ca/~dave/BMW/