5-Series (E12,E28, E34, E39, E60)Chat relating to the BMW 5-Series of all generations. Specific models include: BMW 518, BMW 520, BMW 520i, BMW 530i, BMW 528i, BMW 530i, BMW 518i, BMW 524d, BMW 525i, BMW 525e, BMW 528e, BMW 540i, BMW 535i, BMW 520d, BMW 525td, BMW 525d, BMW 530d, BMW 525i/xi, BMW 530i/xi. (BMW 5-Series Forum)
I will be buying a 92 525i Wagon in a few days. This is a European spec car. The car has no radio in it right now, but, I found and purchased a factory radio and its wiring harness plugs from a junked similar vintage 7 series car. I assume most of these radios interchanged in some fashion, and that all I have to do to hook it up is splice the matching wire colors in the dash to the plugs for the radio.
My question is, how does the radio ground? Does the threaded stud in the middle of the radio (rear view) ground to the body? There doesn't seem to be a specific ground wire, unless the Germans use a color other than black to designate ground.
I've attached a few pics of the radio front and back to help show what I mean.
The screw you are referring to, usually has a threaded "rubber piece" for lack of a better visual. The radio is already grounded through the wiring. Yes the Germans use a different color system to the wire coding than we do in the states.
Live (L): Brown or black, (but black is not very common, I never see it)
Neutral (N): Blue
Earth (G): or common ground is Yellow and Green striped
I am a Biomedical Technician and specialize in German Dialysis machines. The color coding is the same on even the medical equipment...
I hope this helps
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