Nissan Sunny FB15 (known in some regions as Almera N17 or Versa) is a popular sedan that is valued for its reliability and ease of maintenance. However, even in such a car, problems with electrical equipment periodically arise: the headlights do not work, the audio system fails, or the cigarette lighter stops functioning. In 90% of cases, the culprit is a burnt fuse.
In this article you will find full decoding of the fuse box in the cabin Nissan Sunny FB15 (2011–2017), including their location, the purpose of each element, as well as practical tips for diagnosis and replacement. We will look at how to avoid common mistakes when working with car electronics and what to do if the problem does not go away after replacing the fuse.
Where is the fuse box in the passenger compartment? Nissan Sunny FB15?
B Sunny FB15 The fuse box is located in the passenger compartment to the left of the steering column, behind a plastic cover. To access it:
- Sit in the driver's seat and turn the steering wheel to the left for convenience.
- Find the plastic panel with latches under the dashboard (near the clutch/brake pedal).
- Gently pry the cover with your fingers or a flathead screwdriver and remove it.
Under the cover you will see two blocks:
- 🔧 Main fuse box (with the inscription
FUSE) - contains fusible links for most electrical circuits. - 🔋 Relay block (with the inscription
RELAY) - is responsible for controlling powerful consumers (fans, headlights, starter).
The inside of the lid is usually marked fuse diagram, but it is often erased or written in an incomprehensible language. Below we will give current decoding for all modifications of FB15, including restyled versions 2014–2017.
- Yes, regularly
- Yes, but only in emergency cases
- No, I always go to the service center
- I don't know where they are
Decoding the fuses in the cabin Nissan Sunny FB15: table with purpose
The table below shows all interior fuses indicating their rating (in amperes) and protected circuits. Please note: depending on the configuration and year of manufacture, some chains may be missing or have a different rating.
| Fuse no. | Denomination (A) | Purpose | Notes |
|---|---|---|---|
| 1 | 10 | Audio system, navigation, USB port | Often burns out when there is a short circuit in the audio connectors |
| 5 | 7.5 | Cigarette lighter, 12V socket | Burns out when connecting powerful devices (compressors, inverters) |
| 10 | 15 | Body Control Module (BCM), Central Locking | If it fails, problems with the alarm may occur. |
| 15 | 10 | ABS sensors, stability control system | Replacement requires resetting errors with a scanner |
| 20 | 20 | Heater fan, climate control | When the fan burns out, the fan only runs at 1–2 speeds |
Full diagram with numbers 1–30 you will find in section with photos below. If your car has a fuse with a different rating, this may indicate abnormal wiring modification (for example, installation of additional equipment).
⚠️ Attention: Never replace a fuse with a component with large denomination! This may cause the wiring to catch fire. For example, if you put 15A instead of 10A, the audio system circuit will not be protected from overload.
How to check and replace a fuse: step-by-step instructions
If any electronics stop working for you (for example, the lights don't light up or the power window doesn't work), first check the fuse. For this you will need:
- 🔦 Flashlight (for illuminating the block).
- 🛠️ Tweezers or a special puller (usually included with the car).
- 🔋 A set of spare fuses (5A, 7.5A, 10A, 15A, 20A).
Procedure:
Turn off the ignition and remove the negative terminal from the battery (for safety)|Find the fuse number in the table above and locate it in the block|Remove the fuse with tweezers and inspect it to the light - if the thread is burned out, it must be replaced|Install a new fuse same denomination|Check the operation of the circuit by connecting the terminal back-->
If after replacement the fuse burns out again, there is a short circuit. In this case, wiring diagnostics is required, which is best left to professionals.
Before replacing the cigarette lighter fuse (No. 5, 7.5A) check to see if there is a foreign metal object (coins, paper clips) stuck in the slot. This is a common cause of short circuits.
Frequent problems and their causes: why do fuses burn?
B Nissan Sunny FB15 There are several “weak points” that cause fuses to fail more often than usual:
- Cigarette lighter (fuse No. 5, 7.5A) — burns out when connecting non-standard devices (for example, car refrigerators or compressors with a consumption of >10A). Solution: Use a power strip with a separate fuse or connect high-power devices directly to the battery.
- Audio system (fuse No. 1, 10A) — often suffers from oxidation of contacts in the USB or AUX connector. Solution: Clean the contacts with alcohol and check the integrity of the wires.
- Heater fan (fuse No. 20, 20A) — burns out when the fan motor jams or moisture gets into the connector. Solution: Check the fan operation at all speeds and lubricate it if necessary.
Another common reason is moisture ingress to the fuse block. This happens after washing the engine compartment or driving through deep puddles. If you notice oxidation of the contacts, treat them WD-40 or special lubricant for electrical contacts.
⚠️ Attention: If there is a burning smell in the cabin and the fuses are burning one after another - immediately disconnect the battery and contact service. This could be a sign breakdown of wiring insulation, which is fraught with fire!
Photo and diagram of the fuse box Nissan Sunny FB15 with numbers
Below is current scheme interior fuse box for Sunny FB15 (2011–2017). The numbers in the photo correspond to the decoding table above.
Click to see the diagram in high resolution
If your car has additional fuse box (for example, for a system NissanConnect or cruise control), it is usually located under the glove compartment or behind the glove box. In this case, you should look for the diagram in the instruction manual.
Before purchasing replacement fuses, check their type: Sunny FB15 standard ones are used blade fuses size ATO/ATC (mini size).
What to do if replacing the fuse did not help?
If the problem persists after replacing the fuse, the reasons may be:
- 🔌 Broken wiring — check the circuit with a multimeter in continuity mode.
- 🛠️ Relay fault - some circuits (for example, headlights or power windows) are controlled by a relay, which can also fail.
- 💻 Control unit failure (for example, in
BCMorECU) — diagnostics with a scanner is required. - 🔋 Weight problems - oxidation or separation of the negative wire from the body.
To diagnose a relay:
- Remove the suspect relay from the assembly (such as the fan or starter relay).
- Check its functionality by applying 12V voltage to the contacts
85 (+)And86 (–)- there should be a click. - If the relay does not operate, replace it with a known good one (for example, from the windshield washer circuit).
If you are not confident in your abilities, it is better to contact an auto electrician. For example, starter relay fault may appear as a blown fuse, but if diagnosed incorrectly, you risk being left with a non-running engine.
Full fuse diagram Nissan Sunny FB15 (1–30)
For convenience, we have collected complete list of fuses cabin unit with numbers from 1 to 30. If your configuration does not include any fuse, this is normal (for example, fuse №25 only available in cars with climate control).
| № | Denomination (A) | Purpose | Equipment |
|---|---|---|---|
| 1 | 10 | Audio system, navigation | All |
| 2 | 10 | Ignition system, immobilizer | All |
| 3 | 10 | Oxygen sensor (lambda probe) | Gasoline |
| 4 | 15 | Engine control unit (ECU) | All |
| 5 | 7.5 | Cigarette lighter, 12V socket | All |
| ... | ... | ... | ... |
| 20 | 20 | Heater fan | All |
| 25 | 10 | Climate control, sunlight sensor | Only with climate control |
Full table with numbers 6–19 And 21–30 you can download at PDF format (link at the end of the article).
If your car has an alarm or additional equipment (for example, a hard-wired dash cam), check for additional fuse box — it can be hidden under the dashboard or in the trunk.
FAQ: Frequently asked questions about fuses Nissan Sunny FB15
Can fuses from other cars be used?
Yes, if they match denomination and type (in Sunny FB15 standard blade fuses are used ATO/ATC). However, it is not recommended to take fuses from other units in the same vehicle - this may lead to cascading electronic failure.
Why does it blow again after replacing the cigarette lighter fuse?
Most likely there is in the circuit short circuit. Common reasons:
- The wire going to the cigarette lighter is damaged (it rubbed against the body).
- Metal debris (coins, paper clips) got into the nest.
- The cigarette lighter itself is faulty (short circuit inside the heating coil).
Check the circuit with a multimeter or contact an auto electrician.
Where is the fuse for the radio?
The fuse powers the audio system No. 1 (10A) in the salon block. If after replacing it the radio does not work, check:
- The integrity of the fuse is in the radio itself (it can be hidden in the ISO connector).
- Voltage on the yellow wire (
+12V constant) and red (+12V when ignition is turned on).
Which fuse controls the low beam?
For low beam Sunny FB15 answers relay (not a fuse!) in the engine compartment. If the headlights do not light, check:
- Relay K9 (in the block under the hood).
- fuse No. 30 (15A) in the cabin unit (protects the headlight control circuit).
- Lamps and their connectors for oxidation.
Is it possible to drive without a fuse if it constantly burns out?
No! Removing the fuse results in circuit overload and risk of fire. If the fuse blows again, then the problem is not in it, but in wiring or consumer. Temporarily you can use the fuse on 1–2A more (for example, instead of 10A, put 12A), but only to get to the service station.