The following manual provide detail description, illustration and explanation of 2001 Legacy’s wiring diagram and engine electrical system. This manual includes the procedures for maintenance, disassembling, reassembling, inspection and adjustment of components and diagnostics for guidance of experienced mechanics. The wiring diagram manual is divided into sections which cover detail discussion on Basic Diagnostics Procedure, Working Precautions, Super Multiple Junction (SMJ), Power Supply Routing, Ground Distribution, Airbag System, Air Conditioning System, Anti-lock Brake System, A/T Control System, Audio System, Charging System, Combination Meter, Cruise Control System, Door Lock System, Headlight System, Power Window, Starter System, Front Wiring Harness, etc.
Find more information about Subaru Legacy Wiring Diagram and Engine Electrical System in the following article. (source: subaru-car.ru)