Nissan Terrano The 2018 model year is a popular crossover that, with proper maintenance, can last for years without major breakdowns. However, even in reliable cars, fuses periodically blow, especially when it comes to electrical circuits with a high load. Knowing the location and purpose of each fuse will help you quickly troubleshoot problems, whether it's headlights failing, power windows not working, or problems with the audio system.

In this article you will find detailed diagram of fuse and relay blocks for Nissan Terrano 2018, including their exact installation locations, decoding by numbers and diagnostic tips. We will also look at common replacement errors that can lead to short circuits or electronic failure. If this is your first time dealing with car electrics, don’t worry: the instructions are adapted for beginners, but will also be useful for experienced car owners.

Where are the fuse boxes in the 2018 Nissan Terrano?

B Nissan Terrano 2018 fuses and relays are distributed according to three main blocks, each of which is responsible for certain vehicle systems. Their location is standardized for most modifications, but may vary slightly depending on the configuration (for example, the presence of climate control or a rear view camera).

Main installation locations:

  • 🔧 Main unit in the cabin — located to the left of the steering column, behind the protective cover. Responsible for most control circuits, including lighting, audio and power windows.
  • 🚗 Block under the hood — located next to the battery, in a plastic box. High power fuses are concentrated here (for example, for the cooling fan or ABS).
  • 🔌 Additional block — in some trim levels it is installed behind the glove compartment or under the center console. Usually contains a relay for additional equipment (heated seats, heated steering wheel).

To gain access to the cabin unit, it is enough open the cover on the instrument panel (it is fixed with latches). For the block under the hood you will need disconnect the battery terminal and remove the protective cover. Caution: When working with fuses under the hood, always disconnect the negative terminal of the battery to avoid a short circuit if the contacts are accidentally shorted.

📊 Where do your fuses blow most often?
  • In the salon block
  • Under the hood
  • In the additional block
  • Haven't encountered a problem

Diagram and decoding of the cabin unit fuses

The interior fuse box is the most popular one when diagnosing faults. Below is a table with a breakdown for Nissan Terrano 2018 (valid for most trim levels, including Comfort And Tekna). The fuse numbers are indicated on the back of the unit cover.

Number Ampere Purpose Notes
F1 10A Interior lighting, glove compartment lighting Often burns out when installing non-standard LED lamps
F5 15A Audio system, navigation May fail when connecting powerful subwoofers
F10 20A Power windows (all 4 doors) Burns out when the mechanism freezes or jams
F14 7.5A Cigarette lighter, USB port Sensitive to connecting powerful devices (for example, compressors)
F20 10A Body Control Module (BCM) If it fails, the central locking system may malfunction.

If the fuse is blown, it must be replaced with one of the same rating. Never install a fuse with a large ampere - this may lead to a fire in the wiring. For example, if instead 10A put 15A, the interior lighting circuit may overheat.

⚠️ Attention: When replacing fuse F14 (cigarette lighter), check the integrity of the USB port connector. Often a short circuit occurs due to metal objects or liquid entering the socket.

☑️ Diagnosis of fuse failure

Done: 0 / 4

Underhood Fuse Box: High Power Circuits

The block under the hood contains fuses and relays responsible for high power consumption systems: starter, generator, cooling fans, ABS, etc. The fuses used here are maxi-fuse (large size) and standard mini-fuse. Access to the block is achieved after removing the cover, which is secured with two latches.

Typical problems associated with this block:

  • 🔥 Burnout F30 (30A) — responsible for the cooling fan. If the fuse is blown, the engine will overheat, especially in traffic.
  • ⚡ Relay K5 failure - controls the fuel pump. If there is a malfunction, the car will not start or will stall while driving.
  • 🚨 Problems with F25 (10A) - ABS sensor circuit. When a burnout occurs, the corresponding lamp on the dashboard lights up.

To diagnose a relay, you can use a simple method: swap places with a known good relay (for example, with a fan relay). If after replacement the problem disappears, the relay is faulty. Remember that relays have standard sizes, but differ in rated current (indicated on the body).

How to test a relay without a multimeter?

If you hear a knocking or rattling sound when you shake the relay, this is a sign of a malfunction. You can also apply 12V voltage to the relay coil (pins 85 and 86) and check the closure of pins 30 and 87 using a light bulb or tester.

Typical causes of blown fuses

Fuses in Nissan Terrano 2018s don’t fail just like that - their burnout is always associated with problems in the circuit. Let's look at the most common reasons:

1. Short circuit in the wiring. Most often occurs due to:

  • 🔌 Damage to wire insulation (for example, during repairs or an accident).
  • 💧 Moisture getting into the connectors (relevant for the cigarette lighter fuse).
  • 🔧 Incorrect installation of additional equipment (for example, alarm or radio).

2. Circuit overload. Occurs when connecting devices that consume current higher than the rated current. A classic example is using a powerful compressor to inflate tires through a cigarette lighter, which is designed to 10A (maximum 120 W).

3. Consumer malfunction. If, for example, the power window motor burns out, it can put increased stress on the circuit, causing the fuse to blow. F10.

⚠️ Attention: If the fuse blows again after replacement, don't install a new one until the reason is found out! This may cause the wiring to catch fire. In such cases, it is necessary to diagnose the circuit with a multimeter or contact service.
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When searching for a short circuit, turn off consumers one at a time, starting with the most powerful ones (for example, electric motors). If the fuse stops lighting, the problem is in the last disconnected device.

How to properly replace a fuse: step-by-step instructions

Replacing a fuse is a simple operation, but even here there are nuances that will help you avoid mistakes. Follow this instruction:

  1. Turn off the power. For the interior unit, simply remove the key from the ignition. For the block under the hood remove the negative terminal from the battery.
  2. Find the faulty fuse. Use the diagram from the previous sections or refer to the numbering on the block cover. A blown fuse usually has broken thread or blackened body.
  3. Remove the fuse. To do this, use special tweezers, which are located in the fuse box (usually attached to the cover). If you don't have tweezers, you can carefully pry the fuse off with a screwdriver.
  4. Install a new fuse. He must be same denomination (amps) and type (size). Insert it until it clicks.
  5. Check the operation of the circuit. Turn the ignition on and check if functionality is restored (for example, if the power windows or headlights work).

If after replacement the fuse blows again, this means that there is short circuit or overload. In this case, a more in-depth diagnosis is required.

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Never use “bugs” (homemade wire fuses) - this is a direct path to a wiring fire. Even temporary replacement should be made only with standard fuses.

Diagnostics of circuits using a multimeter

If fuses blow regularly, you need to check the circuit for a short circuit or current leakage. For this you will need multimeter (even the simplest one costs 300–500 rubles). Here's how to do it:

1. Short circuit test:

  • 🔋 Disconnect the battery and remove the fuse from the problematic circuit.
  • 📊 Switch the multimeter to continuity mode (or resistance measurement).
  • 🔌 Connect the probes to the fuse contacts. If the resistance is close to 0 ohm - there is a short circuit in the circuit.

2. Current leakage test:

  • 🔋 Connect the multimeter to the open circuit (between the fuse and its socket) in current measurement mode (10A).
  • 🔍 If the current exceeds 50–100 mA when the ignition is turned off, there is a leak in the circuit (for example, due to a “gluttonous” alarm system or a faulty control unit).

For a more accurate diagnosis it may be necessary wiring diagram Nissan Terrano 2018, which can be found in the repair manual or on specialized forums (for example, drive2.ru or nissan-club.ru).

Frequently asked questions about fuses for Nissan Terrano 2018

Which fuse controls the low beam headlights?

For low beam Nissan Terrano 2018 meets fuse F17 (10A) in the salon block. However, if the lamps do not light, also check the relay K7 and integrity of lamps. Often the problem lies in oxidized cartridge contacts.

Can fuses of a different rating be used temporarily?

Absolutely not. Even briefly installing a high rated fuse can lead to overheating of wiring and fire. If you don't have the right fuse at hand, it's better to temporarily turn off the faulty circuit (for example, not use the cigarette lighter) than to take risks.

Why does the cigarette lighter fuse blow when nothing is connected?

This is a typical problem caused by oxidation of contacts in the cigarette lighter socket or by foreign objects (coins, paper clips). Disassemble the socket, clean the contacts with alcohol and check the integrity of the wiring. The cause may also be a malfunction of the USB hub (if it is connected to the same circuit).

Where can I find a fuse diagram for my configuration?

The fuse diagram may vary slightly depending on the configuration (Visia, Acenta, Tekna). You will find the exact diagram:

  • 📄 B instruction manual (section "Electrical equipment").
  • 🌐 On the official website Nissan in the technical documentation section.
  • 🔧 On the cover of the fuse box (usually the current diagram is shown there).
What should I do if the device does not work after replacing the fuse?

If the fuse is intact, but the device (for example, a radio or power window) does not work, check:

  • 🔌 Wiring integrity from fuse to device.
  • 🔧 Serviceability of the device itself (for example, window lift motor).
  • 📶 Availability of power at the connector using a multimeter.
  • 🔄 Relay performance (if it is in the circuit).

In some cases the problem may be body control module (BCM), which requires flashing or replacement.