Nissan Almera Classic (also known as Nissan Almera N16 or Samsung SM3 in some countries) is a reliable sedan, but even its electrical circuits require attention. Burnt out fuse or faulty relay can leave you without lights, a heater fan, or even an immobilizer. In this article, we’ll look at where to look for fuse blocks, how to check and change them, as well as what nuances are important to consider so as not to burn the car’s electronics.

Feature Almera Classic — two main fuse boxes: one in the cabin (to the left of the steering wheel), the other under the hood. However, their arrangement may differ depending on the year of manufacture (2006–2012) and configuration. We have collected current data for all modifications, including cars with engines 1.5 And 1.6 liter, as well as diesel versions.

Where are the fuse and relay boxes located? Nissan Almera Classic

B Almera N16 предохранители и реле распределены по трём зонам:

  • 🔧 Main cabin block — located to the left of the steering column, behind the plastic cover. This is where the fuses for the lighting, instrument panel and multimedia are concentrated.
  • 🚗 Engine compartment block — located next to the battery (driver's side). Responsible for high load circuits: radiator fan, starter, generator.
  • 🔌 Additional relay block — in some trim levels it is installed under the glove compartment or behind the center console. Most often here are the immobilizer and injection system relays.

To get to the interior unit, just pry off the cover with a screwdriver or the flat side of the key. The engine compartment unit can be closed with a protective cover with latches - it must be removed by pulling it up. In models 2010–2012, the engine compartment block is sometimes moved closer to the windshield - this is due to a change in the layout for Euro-5 standards.

📊 Where do your fuses burn most often?
  • In the salon block
  • In the engine compartment
  • Never burned
  • I find it difficult to answer

Fuse diagram Nissan Almera Classic: decoding by numbers

Each fuse in Almera N16 marked with number and rating (in amperes). Below is a table for the cabin unit - the most popular for diagnostics:

Number Denomination (A) Purpose Symptoms of a problem
F1 10 Dimensions lamps (left side) The left side lights and the license plate light do not light up.
F7 15 Cigarette lighter, 12V socket Cigarette lighter does not work, devices do not charge
F10 20 Heater fan The stove does not blow, even at maximum speed
F18 10 Engine control unit (ECU) Floating speed, error P0606 on diagnostics
F25 15 Central locking, alarm Doors do not close/open with key fob

The following fuses are relevant for the engine compartment block:

  • 🔋 F30 (30A) — radiator cooling fan. If it burns out, the engine overheats at idle.
  • ⚡ F32 (100A) — generator main relay. When the battery fails, the battery does not charge and lights up on the dashboard. BATT.
  • 💡 F35 (15A) — low beam (right headlight). Often lights up when installing LED lamps.
Why do the cigarette lighter fuses often burn in Almera Classic?

This is due to the design of the 12V socket - its contacts oxidize over time, which leads to increased resistance and overheating. The culprit may also be the use of cheap chargers with a current higher than 2A or connecting compressors directly (without a relay).

How to check the fuse in Nissan Almera Classic without tester

If you don't have a multimeter at hand, you can check the fuse visually or by testing it with a light bulb. Algorithm of actions:

  1. Turn off the ignition and remove the block cover.
  2. Remove the suspected fuse with tweezers (usually included with the block).
  3. Look in the light: if the thread inside is broken or the body is melted, the fuse has burned out.
  4. To check the circuit, take a 12V light bulb with two wires. Connect one wire to the “+” of the battery, the second to the fuse contacts alternately. If the light does not light up on one of the contacts, the circuit is broken.

Make sure the ignition is turned off

Wear gloves (to avoid static discharge)

Check the rating of the new fuse (must match the old one)

Inspect the block sockets for oxidation -->

Important! Never install a fuse with a higher rating than indicated in the diagram. For example, instead of 10A, install 15A - this will lead to the risk of a wiring fire. If the new fuse blows immediately, look for short circuit in chains!

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If the fuse blows repeatedly, check the wiring from the unit to the consumer. Often the problem lies in frayed insulation under the pedal assembly or in the doorways.

Location and purpose of the relay in Nissan Almera Classic

Relay in Almera N16 are responsible for controlling high-current circuits: starter, headlights, fuel pump. Their failure is manifested by characteristic symptoms:

  • 🔑 Starter relay (K1) - if you hear clicks when you turn the key, but the starter does not turn, it is to blame.
  • ⛽ Fuel pump relay (K3) - if there is a malfunction, the engine does not start, although the starter works.
  • 💨 Cooling Fan Relay (K5) — if the fan does not turn on when overheated, check it and the temperature sensor.

In the interior block, the relays are located in the lower part (under the fuses). They can be removed by hand by pulling up. To check, replace the suspected relay with a known good one (for example, a horn relay). If after replacing the circuit works, the problem is in the relay.

Designation Purpose Symptoms of malfunction
K1 Starter Clicking noise when turning the key, but the engine does not start
K3 Fuel pump The engine does not start, the pump cannot be heard when the ignition is turned on
K7 Main relay (ECU) No power to the control unit, errors P0600–P0606
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The fuel pump relay (K3) often gets stuck when the battery voltage is low. If the car does not start after being parked for a long time, first check the battery charge.

Common Fuse and Relay Problems: Causes and Solutions

Owners Almera Classic often encounter several typical faults:

  1. Cigarette lighter fuse blows (F7) — the culprit is usually oxidized contacts or connecting powerful devices (for example, a refrigerator). Solution: clean the contacts and use a fused power strip.
  2. Heater fan fuse (F10) is on — check the heater motor for jamming or brush wear. Often the problem is solved by lubricating the bearings.
  3. Low beam does not work (F35) - if the fuse is intact, check the relay K12 and lamps. In machines with halogen, do not touch the bulb with your hands!

Another common problem is oxidation of contacts in blocks. This leads to false tripping of fuses and unstable operation of electronics. For prevention, once a year, remove the unit covers and clean the contacts with alcohol or a special liquid (for example, Kontakt 60).

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If the problem persists after replacing the fuse, check fuse link (fusible link) near the battery. B Almera Classic it is responsible for the generator and starter circuits and can burn out during a short circuit.

Step-by-step instructions for replacing a fuse or relay

To replace you will need: tweezers (usually included with the unit), a new fuse or relay, a flashlight and a screwdriver (for removing the cover). Follow the algorithm:

  1. Turn off the ignition and remove the negative terminal from the battery (for the engine compartment).
  2. Remove the fuse box cover. It is secured in the interior unit with two latches.
  3. Find the faulty element according to the diagram (see tables above).
  4. Remove the old fuse using tweezers or the relay by hand (pull up).
  5. Install a new element same denomination. For relays, refer to the markings (for example, 12V 30A).
  6. Check the operation of the circuit. If the fuse blows again, look for a short circuit!

⚠️ Attention! When replacing the starter relay (K1) do not touch its contacts and the body at the same time - this may cause false operation and damage to the starter.

If you are replacing the fuel pump relay, after installing the new one, turn the ignition on for 5 seconds (without starting the engine) - this will allow the pump to build up pressure in the system. Only after this can you start the car.

Short circuit diagnostics: how to find the cause

If the fuse blows immediately after replacement, there is short circuit (short circuit). To find it:

  1. Disconnect all consumers on this circuit (for example, if the cigarette lighter fuse is on, disconnect the 12V socket).
  2. Install a new fuse. If it does not burn out, the problem is in one of the consumers.
  3. Connect the devices one at a time until the fuse blows again. This way you will find the culprit.
  4. If the fuse burns even without consumers, check the wiring in the area from the unit to the final device. Please note:
  • 🔌 Frayed wires under the pedal assembly or in doorways.
  • 💧 Oxidized contacts in connectors (especially in harnesses under the hood).
  • 🐭 Damage from rodents — mice often chew through the insulation in the engine compartment.

To search for a short circuit, you can use a multimeter in dial mode. Disconnect the fuse and check the circuit one by one for a short to ground. If the device shows a resistance close to zero, there is a short circuit in this section.

How to check a circuit for current leakage?

Connect the multimeter to the open circuit (between the fuse and the socket) in current measurement mode (10A). If the current exceeds 0.05A when the consumers are turned off, there is a leak in the circuit. Most often the alarm or radio is to blame.

FAQ: Frequently asked questions about fuses and relays Nissan Almera Classic

Is it possible to install a larger fuse if it is constantly on?

No! This may cause a fire. If the fuse blows, there is a problem in the circuit (short circuit or increased load). We need to find the reason, and not increase the denomination. For example, for a cigarette lighter, the maximum allowable fuse is 20A, even if the standard 15A fuse is constantly on.

Where is the fuel pump relay located if the car won't start?

Fuel pump relay (K3) is located in the interior fuse box (bottom row, third relay from the left). To check its functionality, swap places with the fan relay (K5) - they are identical. If the pump works after replacement, buy a new relay.

Why did the radio stop working after replacing the fuse?

You probably have the fuses mixed up. Radio in Almera Classic connected to F15 (10A). Also check the fuse-link in the wiring harness behind the glove compartment - it can burn out if the speakers are connected incorrectly.

Which fuse controls the dashboard lights?

The fuse controls the instrument lighting F9 (10A) in the salon block. If after replacing it the backlight does not work, check the lamps on the dashboard board or relay K8 (light relay).

What to do if the contacts in the fuse block melt?

Melting of the contacts indicates prolonged overheating. Required:

  1. Clean the contacts with sandpaper or a file.
  2. Blow out the block with compressed air (to remove metal dust).
  3. Check the circuit for increased load (for example, LED lamps are installed instead of halogen ones).
  4. If the melting is severe, replace the entire fuse box.