BMW 735i 1985 Electrical Troubleshooting Manual

This comprehensive Electrical Troubleshooting Manual provides detailed guidance for diagnosing and repairing electrical faults in the 1985 BMW 735i model.

Key Features and Benefits:

Step-by-step troubleshooting procedures guide you through the diagnostic process, identifying potential causes and solutions.
Detailed electrical schematics and diagrams visually represent the electrical systems, aiding in component identification and circuit tracing.
Important specifications and measurements ensure accurate and efficient repairs.
Tailored specifically for the 1985 BMW 735i, catering to its unique electrical system configuration.
Empowers users to perform electrical repairs themselves, saving time and money while gaining a deeper understanding of their vehicle.

Technical Specifications and Details:

Electrical System:

12-volt negative ground system
Battery capacity: 80 Ah
Alternator output: 120 amps

Major Electrical Components:

Engine control module (ECM)
Ignition coil
Starter motor
Voltage regulator
Headlight switch
Turn signal switch
Wiper switch
Maintenance and Repair Information:

Battery Replacement:

Recommended battery: BMW-approved 12-volt battery with 80 Ah capacity
Battery location: Under the hood, on the passenger side
Fuse and Relay Replacement:

Fuse and relay panel locations:
Under the hood, next to the battery
Inside the cabin, under the dashboard
Fuse and relay identification: Refer to the electrical troubleshooting manual for specific locations and ratings

Electrical Troubleshooting:

Use a multimeter to measure voltage, current, and resistance
Inspect wiring harness for damage or loose connections
Consult the electrical troubleshooting manual for circuit testing procedures
Common Electrical Problems and Solutions:

Battery Drain:

Symptoms: Difficulty starting the vehicle, dim headlights
Solution: Check for parasitic drains using a multimeter, inspect battery terminals for corrosion

Electrical Shorts:

Symptoms: Blown fuses, intermittent electrical failures
Solution: Inspect wiring harness for damage, repair or replace damaged wires

Ground Faults:

Symptoms: Electrical components not functioning properly
Solution: Check ground connections for tightness and corrosion, clean or repair as needed
This comprehensive BMW 735i 1985 Electrical Troubleshooting Manual is an indispensable resource for owners and technicians alike. Its detailed troubleshooting procedures, electrical schematics, and technical specifications empower you to diagnose and repair electrical faults with confidence and precision.

INDEX
How to use this manual
Symbols
Systematic Troubleshooting
Diagnostic Connector
Power Distribution Box
Fuse Data
Accessory Connector
Power Distribution
Fuse Details
Light Switch Details
Block Diagram For 735i Engine Controls
Charging System
Start
Fuel Delivery/ Fuel Control/ Idle Speed Control
Fuel Delivery/ Fuel Control
Fuel Control
Fuel Control/ Ignition
On- Board Computer
Speedometer/ Gauges/ Warning Indicators
Gauges/ Warning Indicators
Warning Indicators
Ignition Key Warning/ Seatbelt Warning
Service Interval Indicator
Active Check control
Brake Lining Warning
Interior Lights
Headlights/ Fog Lights
Lights: Turn/Hazard Warning
Lights: Front/ Park/ Tail/ Underhood
Lights: Rear Marker/ License/ Trunk
Stoplights/ Cruise Control
Light: RH Visor/ Dash/ Transmission Range
Lights: Dash/ Transmission Range
Center Console Lights
Back Up Lights
Cigar Lighter/ Glove Box/ Auto Charging Flashlight
Horn
Heated Door Lock
Power Windows
Central Locking
Power Mirrors
Radio/ Power Antenna
Power Seats
Antilock Braking System (ABS)
Wiper/Washer
Rear Defogger/ Sunroof
Windshield Washer Jet Heaters
Auxiliary Fan/ Vacuum Pump
Automatic Heater- Air Conditioner
Rear Passenger Area Solenoid Valve Control
Fresh Air and Recirculation Air Solenoid Valves Control
Defrost Solenoid Valve Controls
Water Valve Solenoid Control
Temperature Control Loop
Vent Stage and Footwell Solenoid Valve Control
Ground Distribution
Index- Splice Locations
Splice Locations For ABS Harness
Splice Location For A/ C Harness
Splice Location For Rear Harness
Splice Location For Front Harness
Splice Location For Middle Harness
Splice Location For Engine Harness
Component Locations
Connector Views

Language: English
Format: PDF


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