Systematic troubleshooting, Power distribution, Chraging system, Start, Engine control block diagrams, Injection electronics, Electronic transmission control, Brake lining warning, Antilock bracking system, Power mirrors, ... This manual will show you the BMW E34 525i 535i 1989 electrical schematics to make electrical troubleshooting more easier. All wiring diagram between components is shown exactly as it exists in your BMW but the wiring is not drawn to scale. ...