Subaru Subaru Legacy 2005-2009 Electrical Specifications
Explore the detailed electrical specifications for the 2005-2009 Subaru Legacy, including battery, alternator, starter motor, and wiring diagrams. Essential for maintenance, repairs, and upgrades.
Overview Specifications
This document provides detailed electrical specifications for the 2005-2009 Subaru Legacy. It is designed to assist technicians, enthusiasts, and owners in understanding the vehicle's electrical systems, including wiring, fuses, and components. Use the search functionality to locate specific terms or navigate through sections to explore detailed information about the battery, alternator, lighting, and other electrical systems.
How to Use
Use the search bar to enter keywords related to the electrical system, such as 'alternator' or 'fuse box'. Results will highlight relevant sections and subsections for quick access.
Scroll through the document or use the table of contents to jump to major sections. Each section contains subsections with detailed technical points for easy reference.
Key Specifications
Battery Voltage
12V
Alternator Output
110A
Low Beam Wattage
55W
Main Fuse Amperage
5A-30A
Cold Cranking Amps
480A
Available Specifications
Battery and Charging System
This section covers the battery specifications, alternator output, and charging system details for the 2005-2009 Subaru Legacy. It includes information on voltage, capacity, and maintenance tips to ensure optimal performance.
Battery and Charging System
This section covers the battery specifications, alternator output, and charging system details for the 2005-2009 Subaru Legacy. It includes information on voltage, capacity, and maintenance tips to ensure optimal performance.
Battery Specifications
- Battery type: Maintenance-free lead-acid
- Voltage: 12V
- Capacity: 55Ah (C20)
- Cold Cranking Amps (CCA): 480A
- Dimensions: 9.06 x 6.88 x 7.5 inches
- Terminal type: Top post
Alternator Specifications
- Output: 110A at 6000 rpm
- Voltage: 14V
- Regulator type: Internal
- Pulley type: Serpentine belt
Lighting System
This section provides details on the lighting system, including headlights, taillights, and interior lighting. It covers bulb types, wattage, and replacement procedures for the 2005-2009 Subaru Legacy.
Lighting System
This section provides details on the lighting system, including headlights, taillights, and interior lighting. It covers bulb types, wattage, and replacement procedures for the 2005-2009 Subaru Legacy.
Headlights
- Low beam: H11, 55W
- High beam: 9005, 65W
- Bulb type: Halogen
- Replacement interval: Every 2-3 years
Taillights and Brake Lights
- Taillight bulb: 7443, 21W
- Brake light bulb: 7440, 21W
- Bulb type: LED (optional upgrade)
- Replacement interval: Every 3-5 years
Fuse Box and Wiring
This section outlines the fuse box locations, fuse ratings, and wiring diagrams for the 2005-2009 Subaru Legacy. It includes details on fuse types, amperage, and circuit protection.
Fuse Box and Wiring
This section outlines the fuse box locations, fuse ratings, and wiring diagrams for the 2005-2009 Subaru Legacy. It includes details on fuse types, amperage, and circuit protection.
Main Fuse Box
- Location: Under the dashboard, driver's side
- Fuse types: Blade fuses
- Amperage range: 5A to 30A
- Circuit protection: Overcurrent and short-circuit
Engine Compartment Fuse Box
- Location: Near the battery
- Fuse types: Mini and maxi fuses
- Amperage range: 10A to 80A
- Circuit protection: Overcurrent and short-circuit
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Component Specifications
Overview
- Type
- 12V DC system
- Configuration
- Negative ground
- Platform
- Subaru Legacy 2005-2009
- Material
- Copper wiring, ABS plastic housings
- Location
- Engine bay, cabin, and rear of vehicle
Dimensions
- Battery Length
- 9.5 in (241 mm)
- Battery Width
- 6.9 in (175 mm)
- Battery Height
- 7.5 in (190 mm)
- Alternator Diameter
- 5.1 in (130 mm)
- Alternator Length
- 7.9 in (200 mm)
- Fuse Box Length
- 6.3 in (160 mm)
- Fuse Box Width
- 4.7 in (120 mm)
- Fuse Box Height
- 2.4 in (60 mm)
Materials
- Wiring
- Copper with PVC insulation
- Battery Case
- ABS plastic
- Alternator Housing
- Aluminum alloy
- Fuse Box
- Thermoplastic
- Connectors
- Nylon with brass terminals
Features
- Lighting
-
- Halogen headlights
- LED tail lights
- Automatic headlight leveling
- Daytime running lights
- Power Distribution
-
- Centralized fuse box
- Relay-controlled circuits
- Smart alternator control
- Battery monitoring system
- Sensors
-
- Ambient light sensor
- Rain sensor
- Temperature sensor
- Battery voltage sensor
- infotainment
-
- AM/FM radio
- CD player
- Auxiliary input
- Steering wheel controls
- Safety
-
- ABS system
- Airbag control module
- Tire pressure monitoring
- Seatbelt pretensioners
- Climate Control
-
- Automatic climate control
- Rear defogger
- Heated seats
- Dual-zone temperature control
Safety Features
- Circuit Protection
-
- Fuse protection
- Circuit breakers
- Overload protection
- Wiring Safety
-
- Heat-resistant insulation
- Waterproof connectors
- Shielded cables
- Emergency Features
-
- Hazard lights
- Emergency brake light
- Automatic battery disconnect
Comfort Features
- Lighting Comfort
-
- Auto-dimming rearview mirror
- Map lights
- Puddle lights
- Power Features
-
- Power windows
- Power door locks
- Power mirrors
- Convenience
-
- Keyless entry
- Remote start
- Cruise control
- Audio Comfort
-
- 6-speaker system
- Subwoofer option
- Steering wheel audio controls
Accessories
- Lighting Accessories
-
- Fog lights
- LED interior lights
- Cargo area light
- Charging
-
- 12V power outlet
- USB adapter
- Wireless charging pad
- Entertainment
-
- Navigation system
- Bluetooth connectivity
- Satellite radio
Maintenance
- Service interval
- Every 30,000 miles or 24 months
- Service Items
-
- Battery terminal cleaning
- Alternator belt inspection
- Fuse box inspection
- Ground connection check
- Wiring harness inspection
- Maintenance Notes
- Use only OEM or equivalent parts for replacements
Warranty
- Basic Warranty
- Miles: 36,000Years: 3Coverage: Electrical components excluding wear items
- Powertrain Warranty
- Miles: 60,000Years: 5Coverage: Alternator and starter motor
- Corrosion Warranty
- Miles: UnlimitedYears: 5Coverage: Wiring harness and connectors
- Battery Warranty
- Miles: 36,000Years: 3Coverage: Original equipment battery
Production Details
- Manufacturer
- Subaru Corporation
- Manufacturing Process
-
- Automated wiring harness assembly
- Robotic soldering
- Quality control testing
- Quality Control
- Testing: Voltage drop testing, Continuity testing, Load testingStandards: ISO 9001 certified
- Sustainability Practices
-
- Recyclable materials
- Lead-free soldering
- Energy-efficient production
- Production Metrics
- Units Per Year: 150,000Defect Rate: 0.05%Energy Usage: 15 kWh per unit
Service Information for electrical Service
Maintenance and service requirements specific to this component
- Inspect battery terminals for corrosion
- Check alternator belt tension
- Test battery voltage and charging system
- Inspect wiring harness for damage
- Verify operation of all lights
Use dielectric grease on battery terminals
- Replace alternator belt if necessary
- Inspect and clean ground connections
- Test all fuses and relays
- Check for software updates to control modules
- Inspect and test all sensors
Special diagnostic tools required for module testing
- Replace battery if necessary
- Inspect and replace worn wiring harness sections
- Test alternator output under load
- Inspect and clean all electrical connectors
- Perform complete system diagnostic
Battery replacement recommended at this interval
Frequently Asked Questions
Find answers to common questions about torque specifications
Q1 What electrical components are compatible with the 2005-2009 Subaru Legacy?
What electrical components are compatible with the 2005-2009 Subaru Legacy?
The 2005-2009 Subaru Legacy is compatible with a range of electrical components, including alternators, starters, and wiring harnesses designed for the 4th generation Legacy models. Ensure compatibility by verifying part numbers with Subaru's official catalog or consulting a certified technician. Non-OEM parts may require additional modifications.
Q2 What are the maintenance requirements for the electrical system in a 2005-2009 Subaru Legacy?
What are the maintenance requirements for the electrical system in a 2005-2009 Subaru Legacy?
Regular maintenance includes inspecting the battery terminals for corrosion, checking the alternator output, and ensuring all wiring connections are secure. Replace the battery every 3-5 years and inspect fuses and relays annually. Follow the owner's manual for specific intervals and consult a professional for complex diagnostics.
Q3 How do I replace the alternator in a 2005-2009 Subaru Legacy?
How do I replace the alternator in a 2005-2009 Subaru Legacy?
To replace the alternator, disconnect the battery, remove the serpentine belt, and unbolt the alternator. Disconnect electrical connectors and install the new alternator in reverse order. Ensure proper belt tension and reconnect the battery. Refer to the service manual for torque specifications and detailed steps.
Q4 What should I do if my Subaru Legacy's electrical system is malfunctioning?
What should I do if my Subaru Legacy's electrical system is malfunctioning?
Start by checking the battery voltage and connections. Inspect fuses and relays for damage. Use a multimeter to test the alternator output and wiring continuity. If issues persist, consult a diagnostic tool or professional technician to identify and resolve the problem.
Q5 How can I optimize the electrical performance of my 2005-2009 Subaru Legacy?
How can I optimize the electrical performance of my 2005-2009 Subaru Legacy?
Optimize performance by upgrading to a high-output alternator, using high-quality wiring, and ensuring proper grounding. Regularly clean battery terminals and inspect the charging system. Consider adding auxiliary lighting or accessories with a dedicated power source to reduce strain on the main electrical system.
Factory Service Resources
Access official service manuals, technical documents, and repair guides. These resources provide detailed procedures, specifications, and diagrams directly from the manufacturer.
2005-2009 Subaru Legacy Service Manual
Coming SoonComprehensive guide covering electrical system diagnostics, repairs, and maintenance procedures for the 4th generation Legacy.
Subaru Technical Service Bulletin: Electrical System Updates
Coming SoonDetails common electrical issues and recommended solutions for the 2005-2009 Legacy models.
Subaru Legacy Parts and Accessories Catalog
Coming SoonOfficial catalog listing OEM electrical components and accessories for the 2005-2009 Legacy.
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Technical Information
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