Nissan Sunny - a legendary car that is still in use on the roads of the CIS, despite the cessation of official sales. One of the most common problems that owners encounter is blown fuses. Without knowing their location and purpose, even a simple light bulb replacement or fault diagnosis can turn into an hour-long search for the “culprit.”

In this article we will take a closer look at where they are fuse blocks in Nissan Sunny different generations (B14, B15, N16), we will provide decoding of circuits indicating the ratings, and also explain how to properly check and replace the fuse without damaging the car's electrical system. We will pay special attention to the “weak points” - those circuits that fail most often.

Where are the fuse boxes in the Nissan Sunny?

Depending on the year of manufacture and modification Sunny may have two or three fuse blocks:

  • 🔧 Main unit — located in the cabin, under the instrument panel on the driver’s side. In models B14 And B15 it is hidden behind a plastic cover, which is opened by turning the latches. B N16 the block is moved closer to the steering wheel.
  • 🔌 Additional relay block - located next to the main one, but can be separated by a partition. In some versions (eg with air conditioning) the fan and compressor relays are located here.
  • 🚗 Engine compartment block - present only in versions with an injection engine (for example, GA16DE). Located next to the battery, under a plastic casing.

Important: in Nissan Sunny 1990–1995 (body B13) The fuse diagram is different from later models. If your car belongs to this generation, check the markings on the block cover - they should match the diagrams below.

📊 What body type does your Nissan Sunny have?
  • B14 (1995–1998)
  • B15 (1998–2004)
  • N16 (2004–2006)
  • Other

Fuse diagram for Nissan Sunny B14 (1995–1998)

B Sunny B14 The main fuse box contains 20–25 elements, depending on the configuration. Below is the standard diagram for the engine version GA16DE (injector):

Fuse no. Denomination (A) Purpose of the circuit
1 10 Side light (left side), license plate light
5 15 Low beam (right headlight), reverse lamp
10 20 Heater fan motor
15 10 Audio system, cigarette lighter
20 30 Windshield wipers, windshield washer

Attention: fuse No. 15 (10A) is responsible for the cigarette lighter and radio. If it burns out, check the connected devices - often the culprit is abnormal chargers or high-power DVRs.

To access the block:

  1. Open the driver's door and remove the plastic trim under the steering wheel (it is secured with two latches).
  2. Turn the three unit cover latches counterclockwise.
  3. Use tweezers (usually attached to the cover) to remove the fuses.
💡

If a fuse blows again after replacement, do not increase its rating! This may cause the wiring to catch fire. Instead, test the circuit for shorts using a multimeter.

Deciphering fuses for Nissan Sunny B15 (1998–2004)

B B15 The fuse diagram has been redesigned: the number of elements has increased to 30, and some chains were split. For example, now the low and high beams have separate fuses.

Block Features B15:

  • 🔋 Fuse No. 7 (15A) is responsible for ECU (electronic engine control unit). Its burnout can lead to failure to start the engine.
  • 💡 Fuse No. 12 (10A) protects the chain Check Engine. If the lamp does not light up when the ignition is turned on, check this element.
  • 🚪 Fuse No. 25 (20A) controls the central locking. Often fails when installing an alarm system.

Complete diagram for B15 can be found on the back of the unit cover. If it is erased, use the table below:

№ Denomination (A) Chain Note
7 15 ECU, fuel injectors When burned out, the engine stalls
12 10 Check Engine Light, Sensors Often comes out when there is a short circuit in the oxygen sensor
18 10 Fog lights Only included SLX
25 20 Central locking, alarm Check if actuators are not working
How to check a fuse without a multimeter?

If you don’t have a tester at hand, you can visually inspect the fuse in the light - the blown thread will be broken. You can also use the “replacement method”: install a known-good fuse of the same rating. If the device worked, it was the problem.

Nissan Sunny N16 (2004–2006) fuses and their features

Nissan Sunny N16 - the last generation sold in Russia. In it, the fuse box has been moved closer to the steering wheel, and the number of relays has been increased to 12. The main difference from B15 - presence of a separate fuse for immobilizer (No. 3, 7.5A).

Typical problems N16:

  • 🔥 Fuse No. 11 (15A) - responsible for radiator fan. Its burnout leads to engine overheating.
  • 📻 Fuse No. 19 (10A) - protects antenna and audio amplifier. It often fails when connecting a subwoofer.
  • 🔑 Fuse No. 3 (7.5A) - if it burns out, the car will not start (the immobilizer blocks the start).

B N16 also appeared additional relay block under the hood, where are located:

  • 🔄 Cooling fan relay
  • ⚡ Fuel pump relay
  • 💨 A/C compressor relay (if installed)

1. Visually check the filament

2. Replace with a known good one (of the same value)

3. Check the circuit for short circuit with a multimeter

4. Inspect the contacts of the unit for oxidation -->

How to check and replace a fuse: step-by-step instructions

Replacing the fuse in Nissan Sunny takes no more than 5 minutes, but requires care. Follow the algorithm:

  1. Turn off the ignition and remove the negative terminal from the battery (especially if you are working with circuits ECU or immobilizer).
  2. Find the fuse box (see diagrams above) and remove the cover.
  3. Identify the faulty fuse:
    • According to the diagram on the cover or table above.
    • By appearance (burnt-out thread or melted body).
    • Using a multimeter in continuity mode (resistance of a good fuse is ~0 Ohm).
  • Remove the fuse tweezers (do not use metal tools - they can short-circuit the contacts!).
  • Install a new fuse same denomination. Increasing the amperage is fraught with fire!
  • Check circuit operation. If the fuse blows again, look for a short circuit.

    • Important: in Sunny with diesel engine CD20 The fuel pump fuse (No. 14, 15A) is located in the engine compartment. Replacing it requires disconnecting the battery!

    💡

    Never use bugs (wires instead of a fuse). In Nissan Sunny, this most often leads to melting of the wiring in the harness under the panel, the repair of which will cost 10–15 thousand rubles.

    Frequently blown fuses: causes and solutions

    Some fuses in Nissan Sunny fail systematically. Let's look at the most problematic circuits and how to diagnose them:

    fuse Symptoms of malfunction Possible reason Solution
    No. 15 (10A, cigarette lighter) Cigarette lighter and radio not working Short circuit in the socket or connected device Check the socket for foreign objects, replace the connector
    No. 20 (30A, windshield wipers) Wipers or washer do not work Frozen fluid in the reservoir, jammed motor Warm up the tank, check the relay K5 in the block
    No. 7 (15A, ECU) Engine stalls and won't start Problems with sensor wiring or the control unit itself Check the circuit for open circuit, diagnose ECU scanner

    🔧 Diagnostic advice: If the fuse blows immediately after replacement, disconnect all consumers in this circuit and check them one by one. For example, for a cigarette lighter circuit (№15) disconnect the radio and test the socket without load.

    ⚠️ Attention: in Sunny N16 with automatic transmission fuse No. 9 (10A) responsible for solenoids Automatic transmission. Replacing it without diagnosing the transmission can lead to damage to the transmission!

    Video instructions and useful resources

    For clarity, we recommend that you watch the video on replacing fuses in Nissan Sunny:

    If you are not confident in your abilities, contact an electrician. The cost of diagnosing fuses in the service is 500–1000 rubles, which is cheaper than repairing the consequences of incorrect replacement.

    💡

    Before purchasing fuses, check their quality. Cheap Chinese analogues often have a lower rating (for example, instead of 15A - 10A), which leads to frequent burnouts.

    FAQ: Frequently asked questions about Nissan Sunny fuses

    Is it possible to install a fuse of a higher rating if it constantly blows?

    No! Increasing the rating will lead to overheating of the wiring and possible fire. If the fuse blows frequently, look for the cause - usually a short circuit or a faulty consumer (for example, a wiper motor or an air conditioning compressor).

    Where can I find a fuse diagram for a Sunny with a diesel engine?

    In diesel versions (CD20) the fuse circuit is different - for example, there is a separate fuse for glow plugs (usually No. 17, 20A). The diagram is printed on the back of the unit cover or in the service book. If it is not there, contact wiring diagram for diesel Sunny.

    Why does the car not start after replacing fuse No. 7 (ECU)?

    Probably, during replacement the contact with ECU, and the control unit has reset its settings. Try:

    1. Disconnect the battery terminal for 10 minutes.
    2. Replace the fuse and connect the battery.
    3. Turn the key to position ON (do not start!) and wait 30 seconds - ECU must be initialized.

    If this does not help, diagnostics with a scanner is required (for example, Launch X431).

    Which fuse is responsible for heated seats in Sunny B15?

    In versions with heated seats, the fuse is responsible for it. No. 22 (15A). If it is working, but the heating does not work, check:

    • Relay K7 in the block (next to the fuse).
    • Fuse in the control circuit (sometimes doubled as a fuse №14).
    • The condition of the heating elements (they often burn out at the base of the seat).
    What to do if the fuse is intact, but the device does not work?

    There may be several reasons:

    • 🔌 Oxidation of contacts in the fuse box - clean them with alcohol or a special spray (Kontakt 60).
    • 🔧 Relay fault — swap places with a known working one (for example, fan and headlight relays).
    • 📉 Broken wiring — check the circuit with a multimeter from the fuse to the device.
    • 🛠️ Malfunction of the device itself (for example, a wiper motor or a lamp).