Fuse box under the hood of the <em>Nissan Almera Classic</em>: location, diagram and DIY replacement

Nissan Almera Classic (also known as Nissan Sunny B15 in some markets) is a reliable sedan, but even it has problems with electrical equipment over time. Most often, the culprit is blown fuses in the block under the hood. If your headlights, cooling fan do not work, or the audio system fails, the first thing you should check is this particular unit.

Unlike the cabin unit, which is responsible for internal systems, engine compartment fuse block controls critical circuits: ignition, fuel pump, injection system and lighting. Its location is not always obvious to a beginner, and the layout may differ depending on the year of manufacture and configuration. In this article we will look at where to look for the block, how to decipher its circuit and what to do if the fuse is blown.

Where is the fuse box under the hood? Nissan Almera Classic?

In most versions Almera Classic (2006–2012) the fuse box is located under the hood to the right of the battery, next to the air filter. It is hidden under a black plastic cover with latches. On some modifications (for example, with an engine QG15DE) the block can be moved closer to the windshield - this depends on the layout of the engine compartment.

To get to it:

• 🔧 Open the hood and secure it with a stop.
• 🔋 Loosen the negative terminal of the battery (this is optional, but recommended for safety).
• 🖼️ Press the latches of the unit cover (usually there are 2-3 of them) and remove it.

Under the cover you will see a row of fuses and relays. There is often a designation diagram on the inside of the cover, but it may be erased or missing (especially on used cars). In this case, you will have to navigate using the universal decoding.

Fuse box diagram: decoding by numbers and circuits

B Nissan Almera Classic engine compartment contains about 20–25 fuses (depending on the configuration) and 5–7 relays. Fuses are marked with letters F (fuse) and numbers, relays - R. Below is a typical diagram for versions with motors QG15DE And QG18DE (2006–2012):

Designation	Denomination (A)	Chain	Symptoms of a problem
F1	10	Engine control system (ECU)	Engine stalls, errors P0600–P0606
F5	15	Fuel pump	The car does not start, there is no sound of the pump when the ignition is turned on
F10	10	Low beam (left headlight)	One headlight does not light, the fuse may blow if exposed to moisture
F15	10	Radiator cooling fan	Engine overheating, fan does not turn on when reaching 95°C
R3	—	Fuel pump relay	There are no clicks when turning on the ignition

Important: on cars with air conditioning, a fuse is added F20 (10A) for compressor. Its failure leads to a failure of the climate control, but the engine operates normally.

If your circuit is different, check it in the manual or on the sticker under the block cover. On some Almera Classic after 2010 fuses F12 And F13 are responsible for the fog lights, and F18 - for the cigarette lighter (a common cause of burnout due to the connection of powerful devices).

How to check a fuse without a tester?

If you don’t have a multimeter at hand, you can visually inspect the fuse in the light - the blown thread will be broken. You can also replace a suspicious fuse with a known good one with the same rating (for example, from the cigarette lighter circuit).

Typical faults and their causes

Fuses in Nissan Almera Classic They burn out for a reason - it’s always a consequence of a more serious problem. Here are the most common cases:

• ⚡ Short circuit in wiring. Most often it occurs due to frayed insulation of the harnesses (especially near the pedal assembly or under the hood). Symptom: The fuse burns out immediately after replacement.
• 💡 Circuit overload. For example, connecting a powerful tire compressor to the cigarette lighter (F18) or installing LED lamps with incorrect polarity (F10/F11).
• 🌧️ Moisture ingress. The fuse box is leaky, and when washed under the hood or in rainy weather, the contacts can oxidize, leading to voltage surges.
• 🔋 Consumer fault. For example, a jammed cooling fan (F15) or a failed fuel pump (F5) create an increased load.

If the fuse blows again after replacement, don't increase its value (for example, instead of 10A put 15A)! This may cause a fire. Instead:

1. Check the circuit for a short circuit with a multimeter in the "continuity" mode.
2. Inspect connectors and wires for melting or corrosion.
3. Disconnect the consumer (eg lights or fan) and check if the fuse is lit without load.

Step-by-step instructions for replacing the fuse

Replacing the fuse in Nissan Almera Classic takes no more than 5 minutes, but it is important to do it correctly. Here are the detailed instructions:

Step 1: Turn off the power.即使这是小修理，也不要忽视安全。Remove the negative terminal from the battery or at least turn off the ignition to avoid a short circuit.

Step 2: Remove the old fuse. In the block Almera Classic fuses are used mini blade. To remove them, you can use plastic tweezers (usually located in the block) or a small screwdriver. Carefully pry the fuse and pull it up.

Step 3: Check the circuit. Before installing a new fuse, inspect the contacts in the socket for oxidation. If they are green or black, sand them with fine sandpaper.

Step 4: Install a new fuse. Insert a fuse of the same rating (for example, if the F10 at 10A, set only 10A!). Make sure it fits snugly into the socket.

Step 5. Check the system operation. Connect the battery and turn on the ignition. If the fuse blows again, look for the cause in the circuit (see section above).

⚠️ Attention: Never use "bugs" (jumper wires) instead of fuses! B Almera Classic This can cause wiring fires, especially in the fuel pump or ECU circuits.

How to protect your fuse box from moisture and corrosion

One of the main enemies of the engine compartment is moisture. B Nissan Almera Classic the design does not provide for complete sealing, so over time the contacts oxidize and the fuses begin to “fail.” To extend the life of a block:

• 🛡️ Cover the unit with a protective cover. If the stock cover is lost or cracked, you can cut a replacement out of plastic or use a silicone case (sold for electronics).
• 🧴 Process contacts. Once a year, remove the fuses and apply to the socket contacts contact lubricant (For example, Liqui Moly Electronic-Spray). This will prevent oxidation.
• 🚿 Avoid direct washing under the hood. When washing the engine, cover the fuse box with polyethylene or a special plug.
• 🔌 Check the seals. On some Almera Classic The rubber seals between the lid and the block become tanned over time. They can be restored with silicone grease.

If the block has already suffered from corrosion, it can be revived:

1. Remove all fuses and relays.
2. Clean the socket contacts WD-40 or isopropyl alcohol.
3. Dry the block with a hairdryer (without overheating the plastic!).
4. Apply a thin layer to the contacts dielectric grease.

Frequently asked questions about the fuse box Nissan Almera Classic

Even after reading the owners instructions Almera Classic Questions remain. Let's look at the most popular:

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

No! Increasing the rating (for example, from 10A to 15A) may result in melted wiring or a fire. If the fuse blows repeatedly, look for the cause: a short circuit, a faulty consumer or poor contact.

Which fuse is for the cigarette lighter?

In most versions Almera Classic this is F18 (15A). If it burns out, check to see if you have connected devices with a power of more than 120 W (for example, a car vacuum cleaner) to the cigarette lighter.

Why after replacing the fuse F5 (fuel pump) car won't start?

Possible reasons:

1. Fuel pump relay is faulty (R3). Check if you hear clicks when you turn on the ignition.
2. The pump itself burned out. Check the voltage at its connector (should be 12V when the ignition is turned on).
3. The fuel pump screen is clogged. Needs cleaning or replacement.

Where to buy fuses for Nissan Almera Classic?

Standard ones will do mini blade fuses. They can be found:

• In car dealerships (for example, Autodoc, Exist).
• In the auto goods department of hypermarkets (Leroy Merlin, Obi).
• On AliExpress (a set of 100 pieces costs ~200 rubles).

For relays it is better to take original ones Nissan (article depends on the type of relay) or high-quality analogues Bosch.

When to contact service: signs of serious problems

Not all faults related to the fuse box can be repaired yourself. Contact an electrician if:

• 🔥 Fuses are lit immediately after replacement (a sign of a short circuit in the harnesses).
• 💥 There is a burning smell or the plastic of the block has melted.
• ⚡ Several errors appeared on the dashboard at the same time (for example, Check Engine + ABS + Airbag).
• 🔌 Several unrelated systems do not work (for example, headlights + power windows + heater).

The service should:

1. Diagnose circuits using scanner And multimeter.
2. Check the integrity of the harnesses (especially in places of kinks: under the hood, at the doors, under the seats).
3. Replace damaged wires or connectors.

⚠️ Attention: If after replacing the fuse F1 (ECU) the car starts up, but it works unstable (the speed fluctuates, it jerks), do not ignore it! Most likely, the control unit firmware is damaged. In this case, flashing or replacing the ECU is required.

The cost of diagnostics of electrical equipment in the service starts from 1,500 rubles, but it is justified if you are not confident in your abilities. For example, replacing a wiring harness under the hood will cost 5,000–8,000 rubles, and repairs after a fire due to a bug will cost tens of thousands.