Wiring Diagram Bmw E30 M40

The 2 channel premium sound cars used a common brown/black ground wire between the radio and the amp. That wire was then grounded to the chassis. You can see all this in the 2 channel BMW Sound System schematics showing the "digital radio" and the "amplifier". There is no "speaker ground wire" going to the radio in this setup.. Wiring Diagrams. From E30 Zone Wiki.. Wiring can be a tricky matter, and the one-piece Loom fitted to your E30 won't help much. To make it easier for you, we've provided as much documentation as we can get our hands on, to help you trace your cables.. Radio/ Power Antenna Click: Click: Cruise Control Click: Click: Cigar Lights/ Glove Box.

E30 Stereo Wiring for Dummies 10-15-2010, 05:13 PM. Hey everyone;. My lastest project is I'm trying to wire up a new stereo into my new (old) 1987 325i E30 (Premium Sound, with the fader in the dash and the amp in the trunk) Guess what? IT'S SUPER NOT EASY! I'm wiring in a Alpine CDE-100 headunit, I'm keeping the stock speakers for now.. Have a question about wiring for an aftermarket stereo. I've done a bunch of research, and found what seemed like some good DIY instructions, but some of them don't match up to what I have. My car is a 1988 325i Convertible with what I've been told is premium sound. I've removed the factory radio and unplugged the in-dash fader, and then unwrapped the wiring from the fader back to a splice, or.