This is a weird question, and I don't really even have the prerequisite knowledge to ask it properly, but basically, I would like to mess with my car's (E30) OBC (On Board Computer). I found a PDF (https://www.millerperformancecars.com/files/bmw%20electrical%20manual/1989%20BMW%20325i%20-%20325is%20Electrical%20Troubleshooting%20Manual.pdf...