2010 Mazda 3 BL Fuse Box Diagram

The 2010 Mazda 3 (BL) has 2 fuse boxes. Choose the one you’re looking at.

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Left-side fuse block

The cabin fuses of the 2010 Mazda 3 - the first model year the BL generation was sold in North America - sit at the left-hand end of the dashboard, in the short panel the dash butts against just above the kick panel. Open the front door on that side and the cover is at knee height; it unclips towards you and leaves the block facing sideways into the door aperture. On a left-hand-drive car that puts it by the driver's right knee, on a right-hand-drive car by the passenger's left. The October 2008 handbook, form 8AD2-EA-08K, heads the plate "Fuse block (Passenger's side)" although the replacement procedure two pages earlier calls it the fuses on the vehicle's left side.

Three wide cartridge sockets run down the left edge as 1, 2, 3. To their right stand six columns of three narrow blades, counted down each column before stepping right, so 4-5-6 fill the first column and 19-20-21 the last. A second bank starts at the left wall again underneath: 22, 24, 26, 28, 30, 32, 33 and 34 along its upper row, with 23, 25, 27, 29 and 31 tucked under the first five of them, which is why the moulding is cut away at the bottom right. This first BL book still rates 1 BOSE, 7 ESCL and 13 R WIPER; later printings retire two of the three.

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No.	Amp	Description
1	30 AJCASE	BOSE: Bose sound system power feed, on cars built with the Bose-equipped audio package.
2	30 AJCASE	P SEAT: power driver seat motors, where the seat is power-adjusted.
3	30 AJCASE	P.WIND: main power window feed.
4	25 AMINI	D LOCK: door lock motors.
5		Position drawn on the plate but left empty: the handbook prints no name and no rating for it.
6		Position drawn on the plate but left empty: the handbook prints no name and no rating for it.
7	15 AMINI	ESCL: electronic steering lock, on cars with the advanced keyless entry and push-button start.
8	15 AMINI	SAS: air bag sensor and control module.
9		Position drawn on the plate but left empty: the handbook prints no name and no rating for it.
10	15 AMINI	HAZARD: hazard warning flashers.
11	15 AMINI	METER: instrument cluster and the circuits grouped behind it.
12	15 AMINI	OUTLET: accessory power socket.
13	15 AMINI	R WIPER: rear window wiper motor, on the five-door body.
14	15 AMINI	CIGAR: cigarette lighter socket.
15		Position drawn on the plate but left empty: the handbook prints no name and no rating for it.
16	10 AMINI	HEATER: heater and air conditioner blower motor control.
17	10 AMINI	MIRROR: power door mirror motors.
18	10 AMINI	ST SIG: starter signal circuit.
19		Position drawn on the plate but left empty: the handbook prints no name and no rating for it.
20	7.5 AMINI	AUDIO: audio head unit.
21	7.5 AMINI	M.DEF: heated door mirrors, where fitted.
22	7.5 AMINI	AFS: Adaptive Front-lighting System, on cars with swivelling headlights.
23		Position drawn on the plate but left empty: the handbook prints no name and no rating for it.
24	20 AMINI	ENG: engine control system feed taken from the cabin side.
25		Position drawn on the plate but left empty: the handbook prints no name and no rating for it.
26		Position drawn on the plate but left empty: the handbook prints no name and no rating for it.
27		Position drawn on the plate but left empty: the handbook prints no name and no rating for it.
28		Position drawn on the plate but left empty: the handbook prints no name and no rating for it.
29		Position drawn on the plate but left empty: the handbook prints no name and no rating for it.
30	25 AMINI	P.WIND: second power window feed.
31		Position drawn on the plate but left empty: the handbook prints no name and no rating for it.
32	25 AMINI	F WIPER: windscreen wiper and washer.
33		Position drawn on the plate but left empty: the handbook prints no name and no rating for it.
34		Position drawn on the plate but left empty: the handbook prints no name and no rating for it.

Engine compartment fuse block

Under the bonnet of the 2010 Mazda 3 the main fuse and relay block sits on the left-hand side of the engine bay, between the battery and the inner wing, under a black lid that lifts off after its catch is pressed. The fuse puller is clipped to the inside of that lid, and it is the tool the handbook expects you to use on the cabin block as well. Mazda's October 2008 book (form 8AD2-EA-08K) warns that everything here except the MAIN fuse may be replaced by hand.

The lid plate is a wide landscape drawing. A blank nameplate occupies the top left; below it a two-row block of eight small blades carries 32-35 over 36-39. Three long rows fill the centre, each opening with wide cartridge holders on the left and continuing in small blades: 1-2-3 then 4 to 8, 9-10-11 then 12 to 16, 19-20-21 then 22 to 25. Each of those rows is stepped a little right of the one above. The right-hand third of the plate is mostly relays, with 17 and 18 above 26 and 27, the small trio 29-30-31 beneath them and the large 80 A steering link 28 on its own. On this earliest BL table 1, 18 and 31 are printed without ratings.

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No.	Amp	Description
1		FAN 2: second cooling fan position. The 2010 book prints no rating here; from the 2011 book it is a 40 A feed on cars with the second fan.
2	40 AJCASE	ENG MAIN: main engine control system feed.
3	50 AJCASE	BTN 1: first battery feed to the cabin junction block.
4	7.5 AMINI	A/C MAG: air conditioner compressor magnetic clutch.
5	20 AMINI	H/L HI: headlight high beam.
6	15 AMINI	FOG: front fog lights, where fitted.
7		H/L WASH: headlight washer position, left unrated on cars for this market.
8	15 AMINI	SUNROOF: moonroof motor, where fitted.
9		F.DEF RH: right-hand heated windscreen element, a market option left unrated in this book.
10		F.DEF LH: left-hand heated windscreen element, a market option left unrated in this book.
11	40 AJCASE	FAN 1: cooling fan motor.
12	15 AMINI	ROOM: interior lights.
13	15 AMINI	TCM: transaxle control module, on automatic cars.
14	20 AMINI	DSC: Dynamic Stability Control, where fitted.
15	7.5 AMINI	BTN 2: second battery feed to the cabin junction block.
16		AT PUMP: automatic transaxle pump position, left unrated in this book.
17	40 AJCASE	HEATER: heater blower. Named "Heater" in this 2010 book and "Air conditioner" from 2011.
18		INJ: injector position. Unrated in the 2010 book; the 2011 book rates it 30 A.
19	30 AJCASE	R.DEF: rear window defroster.
20	40 AJCASE	IGKEY 2: second ignition switch feed.
21	40 AJCASE	IGKEY 1: first ignition switch feed.
22	15 AMINI	HORN: horn.
23	15 AMINI	STOP: brake lights.
24	10 AMINI	ENG+B: permanent battery feed to the engine control system.
25	25 AMINI	FUEL PUMP: fuel pump.
26	40 AJCASE	ABS: anti-lock braking system.
27	20 AMINI	SEAT WARM: heated front seats, where fitted.
28	80 AJCASE	EHPAS: Electro-Hydraulic Power Assist Steering pump. A bolt-in 80 A link, not a pull-out fuse.
29		Position drawn on the plate but left empty: the handbook prints no name and no rating for it.
30	7.5 AMINI	ABS IG: anti-lock braking system ignition feed.
31		SWS: air bag position. Unrated in the 2010 book; rated 7.5 A from the 2011 book.
32	15 AMINI	H/L LO RH: right-hand headlight low beam.
33	15 AMINI	H/L LO LH: left-hand headlight low beam.
34	7.5 AMINI	ILLUM: dashboard illumination.
35	15 AMINI	TAIL: tail lamps.
36	15 AMINI	ENG INJ: engine control system injector feed.
37	15 AMINI	ENG BAR: powertrain control module.
38	20 AMINI	ENG BAR 2: second powertrain control module feed.
39	15 AMINI	ETV: electric throttle valve.