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NOTE: Wiring Diagrams are classified by OE as belonging to one of three categories. These Three OE Categories Are:: 1 – Standard Equipment 2 – Engine Specific 3 – System Specific and Optional Equipment  Presents These Three Categories As Follows: Standard Equipment This category includes equipment such as Instrument Cluster and Gauges, Headlights/Tail Lights/Turn Signals, Rear Window Defroster, Wipers and Washers, etc.. Standard equipment is found on all vehicles regardless of which engine or optional equipment is installed. The Standard Equipment diagrams can be found at Power and Ground Distribution diagrams. These diagrams have a hyperlinked Wiring Diagram Index that lists all of the components shown within them. Click on the link for the component in question, and the link will take you to the first appropriate diagram with that component’s circuit. Engine Specific This category includes components and systems circuits such as Starting and Charging Systems, Engine Controls, Ignition System, Fuel Injection System, etc., which are unique to a specific engine. The Engine Specific diagrams can be found at Powertrain Management diagrams. These diagrams have a hyperlinked Wiring Diagram Index that lists all of the components shown within them. Click on the link for the component in question, and the link will take you to the first appropriate diagram with that component’s circuit. System Specific and Optional Equipment This category includes equipment such as Air Bag Systems, Anti-lock Brake System, Heated Seats, HVAC System, Comfort System, etc. and provides circuit details for those systems and components

WIRING DIAGRAMS Fig. 3: Computer Engine Control (535i),Throttle SW (Grid 8-11)
1992 BMW 525i

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Fig. 10: Rear Compartment & Accessories (Cont.) Fig. 11: Rear Compartment & Accessories (Cont.) Fig. 12: Power Window (2-Door) , Fig. 1: Engine Compartment Fig. 2: Engine Compartment (Cont.) Fig. 3: Fuse Block & Underdash Fig. 4: Fuse Block & Underdash (Cont) 42318 byte Fig. 5: Underdash (Cont.)51521 byte Fig. 6: Underdash (Cont.) & Instrument Panel , Fig. 7: Underdash & Instrument Panel (Cont.) , Fig. 8: Instrument Panel (Cont.) , Fig. 9: Rear Compartment & Accessories ,

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1. NAMING OF PARTS BB0 Battery BB1 Battery plus unit CA Ignition switch PSF Connection board – Fuse box C1300 Injection-ignition test connector V1300 Injection-ignition test warning lamp 1000 Starter inhibitor switch (automatic transmission)* 1135 Ignition coil 1200 Fuel pump relay 1205 Fuel pump fuse 1210 Fuel pump 1215 Canister purge solenoid valve* 1220 Coolant thermistor 1239 Idle regulation valve 1240 Inlet air thermistor 1302 Injection supply relay 1312 Inlet manifold pressure sensor 1313 Engine speed sensor 1317  Throttle potentiometer 1320 Injection-ignition control unit 1330 Injector 1348 Oxygen sensor heater fuse 1350 Oxygen sensor
4 Instrument panel 8000 Air conditioning switch* 8005 Air conditioning switch* 8020 Compressor supply relay* * According to equipment

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Wiring Diagram Index IMPORTANT NOTE This manufacturer uses “Track” style wiring diagrams. For information on how to use these diagrams effectively, please refer to Diagram Information and Instructions. See: Diagram Information and Instructions Oil Pressure Switch – Warning Buzzer NOTE: Starting with fuse 23, fuses in the fuse holder are identified with an additional numeral 2 added to the number when shown in the wiring diagram (i.e. fuse 23 in the vehicle becomes 223 in the diagrams, fuse 24 becomes 224, and so on). Track 1-14 IMPORTANT NOTE This manufacturer uses “Track” style wiring diagrams. For information on how to use these diagrams effectively, please refer to Diagram Information and Instructions. See: Diagram Information and