Intended Users:
Professional automotive technicians and experienced DIY owners performing electrical diagnosis and repair
Skill Level:
Intermediate to advanced - assumes familiarity with multimeters and wiring diagrams
Primary Use:
Fault tracing, connector identification, and circuit verification on the 1999 Impreza
OEM Content:
Factory Subaru wiring diagrams with official component and connector numbering
Accuracy:
Diagram-specific to the 1999 model year, not a generic multi-year compromise
Engine Management:
ECU, sensors, injectors, ignition system circuits
Starting and Charging:
Starter circuit, alternator, battery distribution
Lighting:
Headlights, taillights, turn signals, fog lights, interior lighting
Gauges and Meters:
Instrument cluster, warning indicators, senders
HVAC:
Blower motor, heater, air conditioning circuits
Wipers and Washers:
Front wiper motor, washer pump circuits
Power Accessories:
Power windows, door locks, mirrors where equipped
Audio:
Radio and speaker circuits
SRS / Airbag:
Airbag system wiring and connectors
Cruise Control:
Cruise control actuator and switch circuits
Troubleshooting:
Circuit operation descriptions and fault-finding flow
Connector Views:
Connector pin layouts and terminal locations
Harness Routing:
Wire harness routing and splice location diagrams
Ground Points:
Ground distribution and earth point locations
Power Distribution:
Fuse and relay locations with circuit protection ratings
Detail Level:
Wire colors, gauges, connector cavity numbers, and component codes included
Abbreviations:
Glossary of electrical symbols and abbreviations
Part Numbers:
N/A - not a parts catalog, electrical service content only
File Format:
PDF (searchable, bookmarked, zoomable)
Compatibility:
Windows, macOS, Linux, iOS, and Android — any device with a PDF reader
Requirements:
A PDF reader application (e.g. Adobe Acrobat Reader, free)
Searchability:
Fully text searchable for fast lookup of any topic
Print Quality:
High-resolution digital pages, printable at full clarity
Binding Type:
N/A — digital download, no physical binding
Paper Type:
N/A — digital download, no physical paper
Airbags:
Dual front airbags (driver and front passenger)
Restraints:
Front seatbelts with pretensioners
Brakes:
Power-assisted 4-wheel disc brakes, optional ABS
Traction:
Full-time all-wheel drive for enhanced stability
Crash Test Ratings:
N/A - not the focus of this electrical manual; refer to NHTSA for 1999 ratings
Audio System:
AM/FM cassette head unit with optional CD player, 4-speaker setup
Wiring Included:
Radio, speaker, and antenna circuits fully diagrammed
Driver Assistance Systems:
N/A - no electronic driver assistance features on this model year
Cruise Control:
Standard or optional cruise control system with full wiring coverage
Oil Change:
Engine oil and filter every 3,750 miles / 6 months under normal service
Spark Plugs:
Replace per factory schedule; platinum plugs at extended interval
Engine Oil:
SAE 5W-30, API SJ or equivalent
Coolant:
Subaru genuine long-life coolant
Known Issues:
Head gasket seepage on 2.5L engines and alternator/battery circuit faults are common electrical diagnostic areas
Electrical Wear:
Ground straps and ignition wiring are frequent fault points on aging 1999 models
Manufacturer:
Subaru Corporation (Fuji Heavy Industries), Japan
Signature Layout:
Boxer engine and symmetrical all-wheel drive heritage since the 1970s
Generation:
Second-generation Impreza (GC/GM platform, 1993-2000), facelifted for 1997-2000
1999 Positioning:
Final years of the second generation, with the 2.5RS performance trim established
