<em>Nissan Sunny FB15</em> fuses: diagram, location and explanation with photo

Nissan Sunny FB15 is a popular sedan that is still used in many countries due to its reliability and ease of maintenance. However, even in such a proven model, electrical problems periodically arise, and most often they are caused by burnt-out fuses. Without knowledge of the block diagram and the purpose of each element, fault diagnosis turns into guessing at random.

In this article you will find detailed description of all fuses and relays in Nissan Sunny FB15 (including modifications with engines GA15DE And GA16DE), their location in the cabin and under the hood, as well as practical tips for checking and replacing. We will figure out which fuses are responsible for frequently failing components: cigarette lighter, power windows, low beam and ignition systemso that you can quickly fix the problem without contacting service.

Where are the fuse boxes located in Nissan Sunny FB15

B Sunny FB15 There are two main fuse blocks:

• 🚗 Main unit in the cabin — located to the left of the steering column, under the instrument panel. It can be accessed after removing the protective cover (latches on the sides).
• 🔧 Additional block under the hood — located next to the battery, in a plastic box with a lid. Most often, high power fuses are located here (for example, for a cooling fan or injection system).

On some versions FB15 (for example, for Southeast Asian markets) there may be a third mini-unit under the glove compartment, but in most European and Japanese modifications it is absent. To avoid confusion, refer to the markings: on the inside of the cover of the main unit there is a diagram with fuse numbers and their ratings.

Diagram and decoding of the cabin unit fuses

The passenger compartment contains fuses for most electrical consumers in the vehicle. Below is a table with a breakdown for Nissan Sunny FB15 (1995–2000), relevant for most trim levels. Please note: the fuse rating (in amperes) is indicated on its body - Replacement with a fuse of a different rating is strictly prohibited!

Fuse no.	Rating (A)	Purpose	Notes
1	10	Side light bulbs (left side)	Often burns out when installing LED lamps
5	15	Cigarette lighter	Fails when connecting powerful devices (for example, a compressor)
10	20	Window lifters	Burns out when the mechanism jams or the glass freezes
15	10	Low beam (right headlight)	Check if the headlight flashes or completely fails.
20	15	Audio system, clock	Responsible for the memory of the radio and on-board computer

The complete diagram with photos can be found in FAQ at the end of the article. If you need to check the fuse for functionality, use a multimeter in continuity mode or visually inspect the thread for breaks. Do not try to “fix” the fuse with twisted wire or foil. - this can lead to a fire in the wiring!

⚠️ Attention: Fuse No. 7 (10A) is responsible for operation ECU (electronic engine control unit). Replacing it with the ignition on can reset the adaptations and cause unstable engine operation. Always disconnect the negative terminal of the battery before intervention!

Underhood fuse box: what's hidden there?

In the engine compartment Nissan Sunny FB15 fuses and relays for high-load circuits are located. Here the ratings are higher - from 20 to 100 amperes, so replacement requires special care. Main elements:

• ⚡ 30A (F1) - main fuse for the ignition circuit. If it burns out, the engine will not start.
• ⚡ 50A (F3) — radiator cooling fan. Burns out when there is a short circuit or a malfunction of the temperature sensor.
• ⚡ 80A (F5) — generator. Responsible for charging the battery.
• ⚡ Relay R2 - fuel pump relay. If the engine fails, it will not receive gasoline.

A feature of the engine compartment block is the presence fuse links (fusible links), which look like ordinary wires, but act as fuses. They are located next to the battery and are marked with letters (for example, FL1, FL2). In the event of a short circuit, these inserts burn out and have to be replaced entirely.

How to distinguish a fuse link from a regular wire?

The fuse link is thinner than the main wiring and has transparent insulation through which the metal core is visible. If it burns out, the core ruptures and the insert requires replacement.

To check fuse links, use the tester in resistance measurement mode. If the resistance tends to infinity, the insert has burned out. Replace only with a part with the same cross-section and marking!

Frequently blown fuses: causes and solutions

Some fuses in Nissan Sunny FB15 fail more often than others. Here are the top 5 “problem” elements and ways to avoid them burning out again:

1. Cigarette lighter (15A, No. 5) — burns out due to the connection of powerful devices (for example, car vacuum cleaners or inverters). Solution: Use a power strip with a separate fuse or connect devices directly to the battery via terminals.
2. Window lifters (20A, No. 10) — the culprit is usually wear of the mechanism or moisture getting into the motors. Lubricate the glass guides with silicone grease and check the integrity of the seals.
3. Low beam (10A, No. 15) - most often suffers when installing LED lamps with incorrect polarity or increased power. Return standard lamps or select LEDs with a similar luminous flux.
4. Audio system (15A, No. 20) - burns out when there is a short circuit in the speakers or wires. Check the insulation integrity and speaker resistance with a multimeter.
5. Cooling fan (50A, F3) — fails when the fan gets jammed or the connectors corrode. Clean the contacts and check the operation of the temperature sensor.

If the problem persists, don't stop at replacing the fuse - look for the root cause. For example, a blown cigarette lighter fuse may indicate a fault in the circuit. ACC (accessories), and frequent failures of power windows are due to wear on the electric motor brushes.

How to properly check and replace fuses

For diagnostics and replacement of fuses in Nissan Sunny FB15 you will need:

• 🔧 Tweezers (usually included with the car).
• 🔋 Multimeter or tester with dialing mode.
• 🔦 Flashlight (for illuminating the engine compartment).
• 📄 Fuse diagram (can be printed or saved to your phone).

Step by step instructions:

If the fuse is intact but the problem persists, check:

1. Integrity of wiring from the unit to the consumer.
2. Relay performance (if necessary, replace it with a known good one).
3. Voltage at the fuse terminals when the ignition is on (should be ~12V).

⚠️ Attention: Never use the “jumper” method (shorting the contacts with a screwdriver or wire) to test fuses. This may lead to damage to electronic components (For example, ECU or climate control unit) and even fire!

Relay in Nissan Sunny FB15: purpose and diagnosis

Along with fuses in blocks Sunny FB15 Relays are installed that control the operation of powerful consumers (starter, fan, fuel pump, etc.). Unlike fuses, relays do not “burn out”, but fail mechanically - for example, due to burnt contacts or wear on the winding.

Main relays and their locations:

Designation	Purpose	Block	Symptoms of a problem
R1	Main relay (ECU)	Salon	Engine does not start, no spark
R2	Fuel pump	Engine compartment	The engine stalls, you can’t hear the pump running when you turn on the ignition
R3	Cooling fan	Engine compartment	Fan does not turn on when overheated
R5	Windshield wipers	Salon	The wipers are jerky or do not turn on

To check the relay:

1. Remove the relay from its socket and inspect the contacts for oxidation or burning.
2. Test the winding with a multimeter: the resistance should be in the range of 50–120 Ohms.
3. Apply 12V to the control contacts (usually 85 And 86) - a click should be heard and the power circuit should close (30 And 87).

If the relay is faulty, replace it with a new one with the same marking. As a last resort, you can temporarily install a relay from another consumer (for example, a wiper relay instead of a fan relay) if their parameters match.

Modifications and features of fuses in different versions FB15

Fuse diagram in Nissan Sunny FB15 may vary slightly depending on the year of manufacture, market and configuration. For example:

• 🇯🇵 In Japanese versions (e.g. Nissan Sunny B14/FB15 for the domestic market) the fuse box may have additional slots for options not available on European models (eg fuse for heated seats).
• 🇪🇺 In European modifications (for example, Nissan Almera N15, which is a rebranding Sunny) The cigarette lighter fuse is sometimes rated 20A instead of 15A.
• 🇺🇸 In American versions (Nissan Sentra B13/B14) there may be a separate fuse for fog lights, which is not included in the basic configurations.

To accurately determine the circuit for your machine, pay attention to:

1. Year of manufacture (before 1997 and after may have different blocks).
2. Engine type (GA15DE, GA16DE, SR16DE — the diagrams are different for diesel and gasoline versions).
3. Availability of options (air conditioning, ABS, electrical accessories - separate fuses are added for them).

If you are not sure about the version of your Sunny FB15, find the VIN plate (usually on the driver's door pillar or under the hood) and check it through the database Nissan official website or services like VIN decoder.

FAQ: Frequently asked questions about fuses Nissan Sunny FB15

Where can I download the complete fuse diagram with photos?

The complete diagram can be found in NicoClub archive (section FB15) or in ManualsLib (search by model). Also, diagrams are often posted on forums, for example, Drive2 - search by tag #NissanSunnyFB15.

Which fuse controls the alarm?

B Sunny FB15 Fuse No. 12 (10A) in the cabin unit is responsible for the standard alarm system. If an aftermarket alarm is installed, its fuse may be located in a separate box under the dashboard or connected directly to the circuit. ACC.

Is it possible to install fuses of a higher rating?

No! Installing a fuse with a rating higher than the standard one will lead to the risk of wiring melting or failure of electronic components. For example, replacing a 10A fuse with a 15A fuse in the dimensional circuit can cause a fire due to overheating of the wires.

What to do if the fuse is intact, but the device does not work?

Check:

1. Integrity of wiring from the unit to the device (look for breaks or oxidation).
2. Relay performance (if it is in the circuit).
3. The voltage at the device terminals (for example, at the cigarette lighter socket should be 12V).
4. The device itself (for example, a light bulb in a headlight or a window lift motor).

How to distinguish a fuse from a relay?

Fuses are small plastic elements with a metal thread inside, which are inserted into the sockets with tweezers. Relays are rectangular boxes with legs that can be removed by hand (usually they click when pressed). Relay covers are often marked with a contact diagram.