E28 Ground Distribution Compiled by Rod Paine from the 1983 BMW 528e / 533i Electrical Troubleshooting Manual Circuit Diagrams, July 2004 G102, on LH fender behind LH headlights is ground for: - Battery - LH Turn/Park Light - LH Horn - LH High Beam - LH Dual Beam - RH Horn - LH Fog Light - RH Fog Light - RH Dual Beam - RH High Beam - Coolent Level Switch (528e ONLY) - Washer Fluid Level Switch - RH Front Turn/Park Light - LH Front Marker Light - RH Front Marker Light - High Beam Relay - Low Beam Check Relay - Aux Radiator Fan Motor - High Speed Motor Relay - Normal Speed Motor Relay G103, above starter motor on engine block or intake manifold stud is ground for: - Purge Valve - Throttle Switch - Main Relay - Idle Speed Control Unit (533i ONLY) - Idle Speed Control Unit (528e) - Motronic Control Unit (7 ground wires) - Flywheel Sensors cable shield - Coolant Temperature Switch - Coolant Temperature Sensor - Filter Capacitor - Oil Pressure Switch G200, under LH side of dash near brake pedal, is ground for: - Auto Trans Range Switch - Instrument Cluster Circuit Board - Cruise Control Actuator - Cruise Control Control Unit - Rear Defogger Switch - Power Window Relay - Light Switch - Ignition Switch - Wiper Washer Switch - Flasher Switch and connection to G201 ground point. - Passenger Mirrior - Drivers Mirror - LH Front Door Lock Actuator - Lock Heater Control Unit - Mirror Control Switch - Seatbelt Warning Timer - Coolant Level Switch (533i ONLY) - Hydraulic Pressure Switch (533i ONLY) - Brake Accumulator Switch (5331 ONLY) - Brake Fluid Level Switch - LH Front Brake Rotor - Wiper Motor - Interior Temp Sensor - Drivers Window Console Switch - LH Rear Window Console Switch - Trunk Lock Actuator - Central Locking Control Unit - RH Front Window Console Switch - RH Rear Window Console Switch - Glove Box Light - Evaporator Temp Regulator - Evaporator Temp Sensor - Heater Temp Sensor - Heater Regulator - On-Board Computer - Blower Speed Switch - Evaporator Blower Resistors - Hazard Switch - Digital Radio - Chime - Cigar Lighter - Auto Charging Flashlight G301, under LH side of rear seat is ground for: - LH Rear Light Assy. - LH License Light - RH License Light - Rear Lights Check Relay - RH Rear Light Assy. - LH Rear Side Marker Light - RH Rear Side Marker Light - RH Rear Brake Rotor - Fuel Tank Sender - Main Fuel Pump - Auxiliary Fuel Pump - Rear Window Defogger Element - Interior Lights Timer Control