BMW Stereo - BMW E34 5 series Website Whatever you do, the wiring of the E34 stereo is strong enough to take the power, no need to change it, but if you change the whole system, you will have to run an RCA cable. The problem with the BMW OEM stereo is that the crossovers are located INSIDE the amp (which is mounted in the driver's side rear quarter panel behind the trunk carpet). Delphi Radio Wiring Diagram | Free Wiring Diagram Delphi Radio Wiring Diagram - Collections Of Delphi Alternator Wiring Diagram Refrence Bmw E34 Radio Wiring. Delphi Alternator Wiring Diagram New Delphi Radio Wiring Diagram. Delphi Alternator Wiring Diagram Fresh Car Wiring Diagrams Best. 2017 Silverado Speaker Wire Diagram Beautiful Factory Car Stereo.