Nissan Sunny - a legendary car that is still in use on the roads of the CIS due to its simplicity and maintainability. But even such a reliable machine periodically has electrical problems. One of the most common malfunctions is the failure of side lights. In 80% of cases, a blown fuse is to blame, but it is not always easy to find it, especially if you don’t have a diagram at hand. In this article we will look at where the size fuses are located on different generations Sunny (B13, B14, B15), how to check and replace them, and what to do if the problem recurs.

Side lights are not only a traffic requirement, but also a safety issue. If they don’t work, you can be fined 500 rubles (Article 12.20 of the Code of Administrative Offenses of the Russian Federation), and in the dark the risk of an accident increases significantly. In this case, the size fuse is on Nissan Sunny often confused with a fuse for low beam or instrument lighting - they can be located in the same block, but have different ratings. We will analyze in detail how not to make mistakes.

Where is the oversize fuse located? Nissan Sunny (B13, B14, B15)

The location of the fuse depends on the generation and year of manufacture of the vehicle. At all Sunny (except for restyled versions for some markets) it is in main fuse box, but his position may differ. Below are the exact data for each body:

  • 🔧 Nissan Sunny B13 (1990–1995) — the size fuse is located in the block under the steering wheel (to the left of the driver). Denomination: 10A, position: F10 or F11 (depending on the configuration).
  • 🔧 Nissan Sunny B14 (1995–2000) — the fuse box has been moved under the hood (on the driver’s side, next to the battery). Required fuse: F17, denomination: 10A.
  • 🔧 Nissan Sunny B15 (2000–2006) — the block is under the steering wheel again, but on the right (behind the plastic cover). Dimensions fuse: F20, denomination: 7.5A or 10A (depends on the market).

On restyled versions Sunny B15 (after 2003) sometimes there is a backup fuse in the additional block under the glove compartment. Its denomination is 5A, and the position is F5. If after replacing the main fuse the dimensions do not work, check this one too.

📊 What body type does your Nissan Sunny have?
  • B13 (1990–1995)
  • B14 (1995–2000)
  • B15 (2000–2006)
  • I don't know

Fuse box diagram: how not to confuse it with others

A mistake many car owners make is to confuse the size fuse with the fuse. low beam or dashboard lights. To avoid this, study the block diagram. Below are the current schemes for each generation:

Generation Dimension fuse position Denomination (A) Circuit connection (what else will turn off if it burns out)
B13 F10 or F11 10 License plate light, trunk lamp
B14 F17 10 Instrument lighting, glove compartment lighting
B15 F20 7.5 or 10 Climate control lights (if equipped), glove compartment lamp

On Sunny B14 And B15 the size fuse is sometimes duplicated with the fuse fog lights (position F18). If after replacement the dimensions work, but the PTF stops working, check this fuse.

⚠️ Attention: On some versions Sunny B15 with a factory LPG, the size fuse may have a rating 15A. Installing a fuse of a lower rating will lead to its immediate blowout!

Step-by-step instructions: how to check and replace the fuse

Replacing the size fuse with Nissan Sunny It takes no more than 5 minutes, but it is important to do it correctly. Follow the instructions:

  1. Turn off the ignition and remove the key from the lock. This will prevent a short circuit when removing the fuse.
  2. Find the fuse box (see section above) and remove the cover. On B13 And B15 it is attached with latches, on B14 - on two screws.
  3. Remove the fuse using plastic tweezers (included in the unit) or a small screwdriver. Do not use metal objects - there is a risk of damaging the contacts.
  4. Check the fuse visually or with a multimeter:
    • 🔍 If the thread inside is broken, the fuse has burned out.
    • 📊 When checking with a multimeter in the “continuity” mode, the working fuse will show 0 ohm.
  • Install a new fuse the same denomination. Do not install a “bug” (wire) under any circumstances - this may lead to a fire in the wiring.
  • Check the dimensions. If they do not light up, the problem is in the relay, wiring or lamps.

    • New fuse (10A or 7.5A)

    Plastic tweezers or screwdriver with insulated handle

    Multimeter (optional)

    Flashlight for illuminating the block

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    If after replacement the fuse blows again, this is a sign short circuit in the chain. In this case, you need to check the wiring (especially in areas of chafing under the hood) or size relay (on Sunny B14/B15 it is located next to the fuse box).

    Typical causes of a blown fuse

    If the size fuse on your Nissan Sunny burns out regularly, the reasons may be the following:

    • ⚡ Short circuit in wiring. Most often it happens in the harness under the hood (wires near the battery fray) or in the driver's door (due to constant opening/closing).
    • 💡 Short circuit in the lamp socket. If moisture gets into the headlights or taillights, it can cause a short circuit. Check seals and cartridges.
    • 🔄 Faulty size relay. On Sunny B14/B15 the relay often “sticks”, which leads to increased load on the fuse.
    • ⚠️ Installation of high power lamps. If you installed more powerful LED lamps or halogen lamps 5W, the fuse may fail.
    • 🔋 Problems with the generator. If the voltage is unstable (above 14.5V) fuses burn more often.

    On Nissan Sunny B15 with factory audio system Clarion The headlight fuse sometimes blows due to a short circuit in the radio. Check its power supply by temporarily turning off the fuse F22 (audio system).

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    If the headlight fuse blows only when the turn signals are turned on, the problem is in the light control unit (on B14/B15 it is located behind the dashboard).

    How to check a circuit of dimensions without instruments (elimination method)

    If you don’t have a multimeter at hand, you can diagnose the problem using the “old-fashioned” method:

    1. Check the lamps. A burnt-out headlight bulb can cause increased stress on the circuit. On Sunny B13/B14 size lamps - T4W (4 W), on B15 — T5W (5 W).
    2. Replace the fuse with a known working fuse.. For example, temporarily install a fuse for the cigarette lighter (if its rating is the same).
    3. Disable consumers one by one:
      • Remove the headlight bulbs (front and rear).
      • Turn off the license plate light.
      • Disconnect the radio connector (if you suspect it).

    If, after disconnecting one of the consumers, the fuse stops lighting, there is a problem there.

  • Check relay. On Sunny B14/B15 The size relay can be swapped with the turn signal relay (they are the same). If after replacement the dimensions work, the relay is faulty.
    • ⚠️ Attention: On Nissan Sunny B13 with carburetor engine GA14 The size fuse may blow out due to oxidation of the contacts on the generator. Clean the terminals and check the open circuit voltage (should be 13.8–14.2V).

    What to do if replacing the fuse does not help

    If after replacing the fuse the dimensions still do not work, the problem may be:

    • 🔌 Dimensions relay (on B14/B15 it is located in an additional unit under the dashboard).
    • 🔧 Wiring. Check the circuit from the fuse to the lamps: 
      Предохранитель → Реле → Выключатель света → Лампы

      On Sunny B13 Wires under the clutch pedal often fray.

    • 💡 Light switch. On all generations Sunny it is located on the steering column. Check his contacts.
    • 🔋 Masse. On B15 The “mass” of the dimensions is attached to the body under the battery. Clean the mounting area.

    If you are not confident in your abilities, contact an auto electrician. Diagnostics of wiring without experience can take a lot of time, and incorrect connection of devices (for example, a multimeter) can damage the light control unit.

    How to check the size relay without replacing it?

    Connect the multimeter in "dial" mode to the contacts 85 And 86 relay When voltage is applied to 85 (plus) and 86 (minus) there should be a click and the contacts 30 And 87 close up. If this does not happen, the relay is faulty.

    Prevention Tips: How to Avoid Frequently Blown Fuses

    To ensure the size fuse on your Nissan Sunny served longer:

    • 🔧 Check regularly wiring condition, especially in places of inflection (under the hood, in the doors).
    • 💡 Use lamps nominal power. LED lamps must have a built-in voltage stabilizer.
    • 🔋 Follow on-board voltage. If the generator produces more 14.5V, the fuses will burn more often.
    • 🚗 After washing, check whether water has entered the headlights or lanterns. Humidity is a common cause of short circuits.
    • 🔌 Clean your contacts periodically fuse box from oxidation (you can use WD-40).

    On Sunny B15 with factory alarm Nissan The size fuse may blow out due to a malfunction of the alarm unit. If the problem persists, turn off the alarm while troubleshooting.

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    If the size fuse blows immediately after replacement, do not install a new one! Find the cause of the short circuit first, otherwise you risk burning the wiring.

    FAQ: Frequently asked questions about the oversize fuse Nissan Sunny

    Is it possible to temporarily drive without the sidebar fuse?

    No. Without a fuse, the dimensional circuit remains unprotected. A short circuit may burn out the wiring or light control unit. As a last resort, use a lower rated fuse (e.g. 5A instead of 10A), but only for a trip to the service station.

    Why do the dimensions burn at full intensity after replacing the fuse?

    This is a sign bad contact in the chain. Check:

    • Oxidation of contacts in the fuse box.
    • State of "mass" (at B14/B15 it's under the battery).
    • The voltage on the lamps (should be 12V).

    If the voltage is lower 10V, the problem is in the wiring or light switch.

    Where to buy a fuse for Nissan Sunny?

    Fuses of standard ratings (7.5A, 10A) are sold in any auto store or market. For Sunny Suitable fuses: ATO (flat, with legs). Cost - from 10 to 50 rubles per piece. You can buy a set of fuses of different ratings for a reserve.

    Is it possible to install a fuse of a higher rating?

    Absolutely not! For example, if instead 10A put 15A, in the event of a short circuit, it is not the fuse that will burn out, but the wiring. This may cause a fire. Always use a safety lock standard denomination.

    Why on Sunny B15 Does the headlight fuse blow when you turn on the turn signals?

    This is a typical problem B15 with light control unit Nissan. The reason is a short circuit in the circuit between the headlights and the turn signals. Solution:

    1. Check the light control unit (located behind the instrument panel).
    2. Replace the turn signal relay (it may be faulty).
    3. Ring the wires from the block to the lamps (look for a short circuit).

    Replacing the light control unit with a used, but working one often helps.