Fuses and relays Subaru Legacy (BL / BP), 2003–2009

The Subaru Legacy is a mid-size sedan with all-weather capability produced by Japanese automaker Subaru. It is equipped with signature horizontally-opposed (boxer) engines and standard Symmetrical All-Wheel Drive (AWD). In this article, we provide a detailed overview of the fuse box diagrams for the 4th-generation Subaru Legacy (chassis codes BL / BP; model years 2003, 2004, 2005, 2006, 2007, 2008, 2009) and the 3rd-generation Subaru Outback (BP) equipped with 2.0L, 2.0L Turbo, 2.5L, and 3.0L engines.

Here you will find fuse box locations, diagrams, and photos. Fuses for the “Cigarette Lighter” and “Fuel Pump” are highlighted in bold.

Engine Compartment

The fuse box is located on the driver’s side of the engine compartment, under a protective plastic cover.

General view.

Fuse Box Diagram – Type 1
No.	Circuit Protected	A
F1	Generator / Alternator	120
F2	ABS / VDC system	30
F3	Spare	25
F4	Radiator cooling fan motor	25
F5		25
F6	Spare	20
F7	Spare	15
F8	Left headlight	15
F9	Spare	20
F10	Horn	15
F11	Spare	25
F12	Fuel pump (Subaru Legacy)	15
F13	Transmission Control Module (TCM)	15
F14	Spare	7.5
F15	Spare	15
F16	Spare	20
F17	Generator / Alternator	-
F18	Empty	-
F19	Secondary air injection pump	60
F20	Secondary air injection system	10
F21	Spare	50
F22	Ignition switch circuit	50
F23	Spare	50
F24	ABS / VDC system	50
F25	Spare	50
F26	Spare	30
F27	Engine management system	30
F28		30
No.	Relay Modules
1	Empty
2	Headlight
3
4	Heated rear window
5	Parking lights
6	Horn
7	Empty
8	Air conditioning system
9	High-beam headlights
10	Empty
11	Secondary air injection pump
12
13

Engine Compartment Fuse Box Diagram (Legacy / Outback) – Type 2
No.	Circuit Protected	A
1	ABS / Vehicle Dynamics Control (VDC) ECU	30
2	Main cooling fan motor (H4 engine)	25
3	Sub cooling fan motor (H6 engine)	25
4	Main cooling fan motor	25
5	Spare	20
6	Right headlight	15
7	Left headlight	15
8	Reverse lights	20
9	Horn	15
10	Rear window defogger	25
11	Fuel pump	15
12	Transmission Control Module (TCM)	15
13	Engine Control Module (ECM)	7.5
14	Turn signal flasher relay	15
15	Parking light switch	20
16	Generator / Alternator	7.5
Relays
1	Main relay
2	Left headlight relay
3	Right headlight relay
4	Horn relay
5	Parking light relay
6	Rear window defogger relay
AC	A/C compressor relay

Passenger Compartment

The fuse box is located on the driver’s side, at the bottom of the dashboard behind a plastic cover.

General location view.

Passenger Compartment Fuse Box Diagram
No.	Circuit Protected	A
1	Trailer connector, rear blower motor	20
2	Empty	-
3	Central locking system	15
4	Relay, windshield wiper de-icer, power sunroof	15
5	Instrument cluster	15
6	Power mirrors, seat heater relay, vanity mirror light	7.5
7	Instrument cluster, Body Integrated Unit (BIU)	15
8	Brake lights	20
9	Heated power mirrors, windshield wiper de-icer	20
10	Power supply	7.5
11	Clock, turn signal flasher relay	7.5
12	Transmission Control Module (TCM), Airbag Control Module (SRS), Engine Control Module (ECM), Body Integrated Unit (BIU)	15
13	12V power outlet (rear)	20
14	Parking lights, tail lights, combination lights	15
15	Empty	-
16	Interior illumination	15
17	Seat heaters	15
18	Reverse lights	10
19	Right headlight relay	7.5
20	Cigarette lighter (Legacy / Outback)	10
21	Starter relay	7.5
22	Air conditioning, rear window defogger relay	15
23	Rear window wiper, rear window washer	15
24	Audio system, clock	15
25	Supplemental Restraint System (SRS)	15
26	Power window relay	15
27	Heater blower motor	15
28		15
29	Front fog lights	15
30	Windshield wiper motor, windshield washer pump	30
31	Climate control module (A/C ECU), Body Integrated Unit (BIU)	7.5
32	Left headlight relay	7.5
33	ABS / Vehicle Dynamics Control (VDC) ECU	7.5

Relay Panel (Located adjacent to main fuse box)
F1	Engine management
F2	Empty
F3	Empty
F4	Empty
1	Front fog light relay
2	Empty
3	Power window relay
4	Blower motor relay
5	Rear fog light relay
6	Heated rearview mirror relay
7	Windshield wiper de-icer relay
8	Heated seat relay