Japanese 90 BMW 750iL E32 sterero wiring help

[lincolnmaster80]

I have a 1990 750iL E32 that was built/ordered for Japan. In doing some research, I have found that most Japanese BMW's were radio ready, which means they did not have a radio upon arival in Japan. However, it does seem to have a premium audio system, unless the only thing that didn't come with the car was the headunit itself. Apparently in some cars, the headunit was dealer installed upon arrival in Japan, which I THINK is the case with my car. It is a Sony cassette deck and I seem to remember something about BMW using Sony once-upon-a-time.

I bought a wiring harness for a 1990-up BMW, but taking out my headunit, I discovered that there is no female end for the wiring harness in the dash...which sucks cuz I would really like to put in my Alpine headunit. So I came to the conclusion that the wiring harness (from Future Shop)(click here for a picture) is for the North American built BMW's. Aside, from getting my voltage/continuity testor and mapping the constant and switched and ground leads, which would probably be the easiest part, does anyone have any schematics or color coded wiring diagrams for the speakers, preferably for a 1990 Japanese 750iL? Can anyone tell me how much of a difference there was between North American and Japanese 750's? At the very least, can someone point to someone I can talk to for some information? I live in British Columbia, Canada, three hours east of Vancouver, so anyone more so "local" would be appreciated, but I will phone long distance. Thanks in advance.

[Bear]

Go to roadfly.com, the E32 board and post this with attn:highline. This is Eric and he lives in Japan and owns a few 7 series machines.