Page 342 of 503
Rear side-marker lights
1. Make sure the ignition is switched off,and the headlight switch is off.
2. Turn the socket and bulb assembly counterclockwise and remove it.
3. Disconnect the bulb from the socket.
4. Install the new bulb in the reverseorder of the removal procedure.
Reverse lights
1. Make sure the ignition is switched off,and the headlight switch is off.
2. Turn the socket and bulb assembly counterclockwise and remove it.
3. Disconnect the bulb from the socket.
4. Install the new bulb in the reverseorder of the removal procedure.
Maintenance and Care
Owner Maintenance
6-45
MX-5_8KH8-EA-21K_Edition3_old 2021-11-10 13:10:56
Page 343 of 503
License plate lights
1. Make sure the ignition is switched off,and the headlight switch is off.
2. Remove the unit by pressing the tab on the unit with your finger and pulling
the unit downward.
3. Turn the socket and bulb assembly counterclockwise and remove it.
4. Disconnect the bulb from the socket.
5. Install the new bulb in the reverse
order of the removal procedure.
▼Replacing Interior Light Bulbs
Overhead light
1. Wrap a small flathead screwdriver with
a soft cloth to prevent damage to the
lens, and then remove the lens by
carefully prying on the edge of the lens
with the flathead screwdriver.
2. Disconnect the bulb by pulling it out.
3. Install the new bulb in the reverseorder of the removal procedure.
Maintenance and Care
Owner Maintenance
6-46
MX-5_8KH8-EA-21K_Edition3_old 2021-11-10 13:10:56
Page 344 of 503

Trunk light
1. Wrap a small flathead screwdriver witha soft cloth to prev ent damage to the
lens, and then remove the lens by
carefully prying on the edge of the lens
with the flathead screwdriver.
2. Disconnect the co nnector from the
unit.
3. Disconnect the bulb by pulling it out.
4. Install the new bulb in the reverseorder of the removal procedure.
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.
Maintenance and Care
Owner Maintenance
6-47
MX-5_8KH8-EA-21K_Edition3_old 2021-11-10 13:10:56
Page 345 of 503

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.
Normal 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. Consult 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 igniti on is switched off,
and other switches are off.
2. Remove the fuse block cover.
NOTE
If the lock is forcefully opened, the fuse
block cover may come in contact with
the frame when it is removed and
become scratched.
When removing the cover, remove it
slowly according to the following
procedure.
1. Disengage the rear lock by
pressing down on the front tab with
your fingers.
2. Remove the front tab while slightly lifting the front of the cover.
Maintenance and Care
Owner Maintenance
6-48
MX-5_8KH8-EA-21K_Edition3_old 2021-11-10 13:10:56
Page 346 of 503
3. Remove the cover while lifting itand sliding it to the rear.
3. If any fuse but the MAIN fuse isblown, replace it with a new one of the
same amperage rating.
Normal Blown
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.
Maintenance and Care
Owner Maintenance
6-49
MX-5_8KH8-EA-21K_Edition3_old 2021-11-10 13:10:56
Page 347 of 503
▼Fuse Panel Description
Fuse block (Engine compartment)
DESCRIPTION FUSE
RATING PROTECTED COMPONENT
1ENG IG3 5 A ―
2ENG IG2 5 A ―
3 HORN2 7.5 A Horn
4 C/U IG1 15 A For protection of various circuits
5 ENG IG1 7.5 A Engine control system
6 ―― ―
7 INTERIOR 15 A Overhead light
8 ENG
B 7.5 A Engine control system
9 AUDIO2 15 A Audio system
10 METER1 10 A Instrument cluster 11 SRS1 7.5 A Air bag
12 ―― ―
13 RADIO 7.5 A Audio system
14 ENGINE3 20 A ―
15 ENGINE1 10 A Engine control system
16 ENGINE2 15 A Engine control system
Maintenance and Care
Owner Maintenance
6-50
MX-5_8KH8-EA-21K_Edition3_old 2021-11-10 13:10:56
Page 348 of 503

DESCRIPTIONFUSE
RATING PROTECTED COMPONENT
17 AUDIO1 25 A Audio system
18 A/C MAG 7.5 A Air conditioner
19 AT P U M P
H/L HI 20 A
Transmission control system
*
20 AT 15 A
Transmission control system*
21 D LOCK 25 A Power door locks
22 H/L RH 20 A Headlight (RH)
23 ENG
B2 7.5 A Engine control system
24 TAIL 20 A Taillights, License plate lights, Parking lights
25 DRL 15 A ―
26 ROOM 25 A Overhead light
27 FOG 15 A ―
28 H/CLEAN 20 A ―
29 STOP 10 A Brake lights
30 HORN 15 A Horn
31 H/L LH 20 A Headlight (LH)
32 ABS/DSC S 30 A ABS, Dynamic stability control system
33 HAZARD 15 A Hazard warning flashers, Turn signal lights
34 FUEL PUMP 15 A Fuel system
35 ENG
B3 5 A
―
36 WIPER 20 A Windshield wipers
37 CABIN
B 50 A For protection of various circuits
38 ―― ―
39 ENG SUB 30 A Engine control system
40 ABS/DSC M 50 A ABS, Dynamic stability control system
41 EVVT
A/R PUMP 20 A Engine control system
42 EVPS 30 A Brake control system
43 FAN1 30 A Cooling fan
44 FAN2 40 A ―
45 ENG.MAIN 40 A Engine control system
46 EPS 60 A Power steering system
47 DEFOG 30 A Rear window defogger
48 IG2 30 A For protection of various circuits
49 INJECTOR 30 A ―
50 HEATER 40 A Air conditioner
Maintenance and Care
Owner Maintenance
*Some models.6-51
MX-5_8KH8-EA-21K_Edition3_old 2021-11-10 13:10:56
Page 349 of 503
DESCRIPTIONFUSE
RATING PROTECTED COMPONENT
51 ―― ―
52 ENGINE4 20 A Engine control system
Fuse block (Left side)
DESCRIPTION FUSE
RATING PROTECTED COMPONENT
1R HT R 3 0 A
Retractable hardtop (RH)
*
2R HT L 3 0 A
Retractable hardtop (LH)*
3 ―― ―
4 ENGINE6 10 A Engine control system
5 F.OUTLET 15 A Accessory sockets
6 ―― ―
7 AT IND 7.5 A
AT shift indicator
*
8 MIRROR 7.5 A Power control mirror
9 R_DECK R 30 A Retractable hardtop (RH)
*
10 R_DECK L 30 A Retractable hardtop (LH)*
11 F.WASHER 15 A Windshield washer
12 P.WINDOW 30 A Power windows
13 ―― ―
14 SRS2/ESCL 15 A Electronic steering lock
15 SEAT WARM 20 A Seat warmer
*
16M.DEF 7.5 A
Mirror defogger*
Maintenance and Care
Owner Maintenance
6-52*Some models.
MX-5_8KH8-EA-21K_Edition3_old 2021-11-10 13:10:56