2020 Mazda CX-9 Fuses and Fuse Box | How to fix a blown fuse

2020 Mazda CX-9 Fuses and Fuse Box | How to fix a blown fuse

The 2020 Mazda CX-9 comes with a fuse box that holds different fuses that are meant to protect the car’s electrical systems. The fuse box, which is usually in the engine area, is very important for keeping the car’s electrical parts safe from overloading or short circuiting. Each fuse controls a different electrical circuit, like the ones that power the windows, the music system, the lights, and more. If there is an electrical problem, a fuse will blow. This will stop the flow of electricity through the connection and protect the component. The amperage rating of the fuses used in the 2020 Mazda CX-9 may change. When a fuse blows, it’s important to replace it with a new one of the same amperage to protect the electrical system and avoid problems. You can find a diagram of where each fuse goes and what it does in the owner’s instructions or on the cover of the fuse box. This will make it easier to find and fix electrical problems when they happen. The electrical systems in your car will work better if you check and fix the fuses on a regular basis.

2023 MAZDA CX-9 Specs, Price, Features, Mileage (Brochure)

Fuses and Fuse Box

Fuses
Your vehicle’s electrical system is protected by fuses.
If any lights, accessories, or controls do not work, inspect the appropriate circuit protector. If a fuse has blown, the inside element will be melted.
If the same fuse blows again, avoid using that system and consult an Authorized Mazda Dealer as soon as possible.

Fuse Replacement

Replacing the fuses on the vehicle’s left side
If the electrical system does not work, first inspect the fuses on the vehicle’s left side.

1. Make sure the ignition is switched off, and other switches are off.
2. Open the fuse panel cover.
3. Pull the fuse straight out with the fuse puller provided on the fuse block located in the engine compartment.
4. Inspect the fuse and replace it if it is blown.
5. Insert a new fuse of the same amperage rating, and make sure it fits tightly. If it does not fit tightly, have an expert install it. We recommend an Authorized Mazda Dealer.
   If you have no spare fuses, borrow one of the same rating from a circuit not essential to vehicle operation, such as the AUDIO or OUTLET circuit
   CAUTION
   Always replace a fuse with a genuine Mazda fuse or equivalent of the same rating. Otherwise you may damage the electric system.
6. Reinstall the cover and make sure that it is securely installed.

Replacing the fuses under the hood
If the headlights or other electrical components do not work and the fuses in the cabin are normal, inspect the fuse block under the hood.
If a fuse is blown, it must be replaced. Follow these steps:

1. Make sure the ignition is switched off, and other switches are off.
2. Remove the fuse block cover.
3. If any fuse but the MAIN fuse is blown, replace it with a new one of the same amperage rating.
   WARNING
   Do not replace the main fuse by yourself. Have an Authorized Mazda Dealer perform the replacement: Replacing the fuse by yourself is dangerous because the MAIN fuse is a high current fuse. Incorrect replacement could cause an electrical shock or a short circuit resulting in a fire.
4. Reinstall the cover and make sure that it is securely installed.

Fuse Panel Description
Fuse block (Engine compartment)

DESCRIPTION		FUSE RATING	PROTECTED COMPONENT
1	CABIN.+B	50 A	For protection of various circuits
2	IG2	30 A	For protection of various circuits
3	INJECTOR ENG.SUB	30 A	Engine control system*
4	SCR1 EVVT	20 A	Engine control system*
5	P.WINDOW1	30 A	Power windows*
6	R.HEATER	20 A	―
7	ADD FAN DE	40 A	Cooling fan*
8	WIPER.DEI	20 A	Windshield wiper de-ice*
9	DEFOG	30 A	Rear window defogger
10	DCDC DE	40 A	For protection of various circuits
11	EPB R	20 A	Electric parking brake (EPB) (RH)
12	EPB L	20 A	Electric parking brake (EPB) (LH)

DESCRIPTION		FUSE RATING	PROTECTED COMPONENT
13	AUDIO DCDC REG	30 A	Audio system*
14	FAN GE	30 A	Cooling fan*
15	ENG.MAIN	40 A	Engine control system
16	ABS/DSC M	50 A	ABS, Dynamic stability control system
17	FAN DE	40 A	Cooling fan*
18	WIPER	20 A	Front window wiper and washer
19	HEATER	40 A	Air conditioner
20	ADD FAN GE	30 A	Cooling fan*
21	ENGINE.IG1	7.5 A	Engine control system
22	C/U IG1	15 A	For protection of various circuits
23	AUDIO2	7.5 A	Audio system
24	METER2	7.5 A	Instrument cluster*
25	ENGINE3	15 A	Engine control system
26	ENGINE2	15 A	Engine control system
27	ENGINE1	15 A	Engine control system*
28	AT	15 A	Transaxle control system, Ignition switch
29	H/CLEAN	20 A	―
30	A/C	7.5 A	Air conditioner
31	AT PUMP	15 A	Transaxle control system
32	HORN	15 A	Horn
33	R.WIPER	15 A	Rear window wiper
34	H/L HI	20 A	Headlight high beam
35	ST.HEATER	15 A	Heated steering wheel*
36	FOG	15 A	―
37	ENG.+B	7.5 A	Engine control system
38	H/L LOW L	15 A	Headlight low beam (LH)
39	ENGINE4	15 A	Engine control system*
40	INTERIOR1	15 A	For protection of various circuits*
41	METER1	10 A	Instrument cluster
42	SRS1	7.5 A	Air bag
43	AUDIO1	15 A	Audio system
44	BOSE	25 A	Bose Sound System-equipped model*
45	ABS/DSC S	30 A	ABS, Dynamic stability control system
46	FUEL PUMP	15 A	Fuel system*

DESCRIPTION		FUSE RATING	PROTECTED COMPONENT
47	FUEL WARM	25 A	Fuel warmer*
48	TAIL	15 A	Taillights, License plate lights, Parking lights
49	SCR2 FUEL PUMP2	25 A	―
50	HAZARD	25 A	Hazard warning flashers, Turn signal lights, Parking lights
51	H/L LOW R	15 A	Headlight low beam (RH)
52	OUTLET	25 A	Accessory sockets
53	STOP	10 A	Brake lights
54	ROOM	25 A	For protection of various circuit

Fuse block (Left side)

DESCRIPTION		FUSE RATING	PROTECTED COMPONENT
1	P.SEAT D	30 A	Power seat*
2	P.WINDOW3	30 A	Power windows
3	R.OUTLET3	15 A	Accessory sockets*
4	P.WINDOW2	25 A	Power windows
5	ESCL	15 A	Trailer hitch*

DESCRIPTION		FUSE RATING	PROTECTED COMPONENT
6	D.LOCK	25 A	Power door locks
7	SEAT WARM	20 A	Seat warmer*
8	SUNROOF	10 A	Moonroof*
9	F.OUTLET	15 A	Accessory sockets
10	MIRROR	7.5 A	Power control mirror
11	R.OUTLET1	15 A	Accessory sockets*
12	SCR3	15 A	―
13	SCR4	15 A	―
14	R.OUTLET2	15 A	Accessory sockets
15	USB	7.5 A	USB power outlet*
16	PLG	20 A	Power liftgate*
17	M.DEF	7.5 A	Mirror defogger*
18	R.SEAT W	20 A	Rear seat warmer*
19	INTERIOR2	15 A	For protection of various circuit
20	AT IND	7.5 A	AT shift indicator
21	P.SEAT P	30 A	Power seat*

FAQs

Useful Link

View Full PDF:  Mazda CX-9 2020 User Manual| Auto User Guide

2023 MAZDA CX-9 Specs, Price, Features, Mileage (Brochure)