Crossover operation Nissan Terrano the second generation inevitably confronts the owner with the need to diagnose electrical systems. When the power window stops working, the radio fails, or the heater fan does not turn on, the first thought is to check the fusible links. Nissan Terrano 2 Fuse Diagram is a logical current distribution system that protects expensive equipment from short circuits and overloads.
Understanding the location of blocks and deciphering their symbols saves time and money on visits to the service center. Unlike many competitors, the Japanese manufacturer has made access to the main components quite simple, although it has provided two separate places for their placement. You have to deal with the mounting block in the cabin and the block under the hood, each of which is responsible for its own critical systems.
Location of main mounting blocks
By car Nissan Terrano (model range R11) the electrical filling is divided into two key zones. The first is located directly in the passenger compartment, usually hidden behind a decorative panel on the left side of the steering column. The second zone is located in the engine compartment, next to the battery and engine control unit. It is important to know that each of these mounting blocks has its own unique function and protects different groups of current consumers.
In the cabin you will find inserts responsible for comfort and multimedia. The fuses for the cigarette lighter, audio system, electric windows and backlight are located here. Under the hood there are elements that protect the power electronics: the starter, generator, ignition system and main cooling units. An incorrect search can lead to wasted time, so always start your diagnosis by identifying a specific symptom.
Please note that depending on the year of manufacture and configuration, the designations may vary slightly. However, the overall architecture electrical diagram remains unchanged for all modifications of the crossover. Always check the markings on the unit cover with the current operating instructions for your vehicle.
Detailed decoding of the block in the cabin
Access to the interior unit is provided by removing the decorative cover, which is secured with special latches. Below it you will see rows fuse links and relays numbered in a specific sequence. Each cell has its own purpose, which is usually indicated on the inside of the lid or in the user manual.
The most common problems are related to the failure of the inserts responsible for the cigarette lighter and radio. If the navigation or glove compartment lighting stops working, check these elements first. Current strength these circuits are typically 10 or 15 amps, making them vulnerable to high-power external devices.
Relays located in this block control more complex processes, such as operating the wipers or turning on the heater fan. Their diagnosis requires a special approach, since they can fail not only due to overload, but also due to sticking contacts.
- 🔌 Cigarette lighter — most often burns out when connecting powerful chargers.
- 📻 Audio system — check if there is no sound or the screen does not turn on.
- 💡 Backlight — is responsible for lighting the interior, glove compartment and instrument panel.
⚠️ Attention: Never try to replace a blown fuse with one with a higher amperage rating. This can lead to wiring fires and damage to expensive electronic equipment. Only use inserts with identical markings.
Sometimes the problem lies not in the insert itself, but in poor contact in the holder. Oxidation or mechanical damage to the stem can simulate burnout. Carefully remove the element and visually check the integrity of the metal jumper inside the plastic case.
Fuse box under the hood
Engine compartment Nissan Terrano 2 contains more powerful protection elements designed for high currents. The unit is located in a protected housing, which is reliably isolated from moisture and dirt. Here are the inserts responsible for starting the engine, operating the headlights and the fuel injection control system.
Particular attention should be paid to the main fuse, which is often called the “finger”. It has increased dimensions and protects the entire electrical system of the car from the catastrophic consequences of a short circuit. If the car is completely de-energized and does not respond to turning the key, the problem may be here.
This block also contains relays for controlling the cooling fan and fuel pump. Their malfunction can lead to overheating of the engine or the inability to start the engine. Diagnosis of these elements requires careful inspection of the contacts and checking their operation when the ignition is turned on.
- 🔋 Generator — protects the battery charging circuit from voltage surges.
- 💡 Headlights — is responsible for the operation of the head light and side lights.
- ⚙️ Fan — controls the operation of the engine cooling system.
- Cigarette lighter fuse blown
- Heater fan not working
- Power windows failed
- Lighting problems
Tools and replacement procedure
To replace burnt out elements yourself, you do not need complex equipment. The car often comes with special plastic tweezers, which are attached to the unit cover or placed in the glove compartment. If you don't have one, you can use regular tweezers or pliers with insulated handles.
The replacement procedure is simple, but requires compliance with safety measures. Before starting work, you must turn off the ignition and, if possible, disconnect the negative terminal of the battery. This will eliminate the risk of a short circuit when removing or installing a new element.
☑️ Preparing to replace the fuse
Inspection of the element should be carried out in good lighting. A burnt-out jumper inside the transparent case is visible to the naked eye - it is either torn or has traces of melting. If in doubt, you can check the element with a multimeter in continuity mode.
Installation of the new fuse must go all the way. Poor contact may cause heating and re-ignition. Make sure that the element fits tightly in its seat and has no play.
⚠️ Attention: If the new fuse blows immediately after installation, this indicates a short circuit in the circuit. In this case, it is strictly forbidden to continue experiments and turn on the device. A complete wiring diagnosis by a specialist is required.
Sometimes the reason for frequent burnouts is the vibration characteristic of SUVs. In such cases, it makes sense to check the reliability of the block’s fixation and the integrity of the wiring at the connection points. Additional contact insulation may solve the problem.
Table of main denominations and consumers
For ease of diagnosis, we have prepared a summary table describing the most common circuits and their ratings. This information will help you quickly navigate when troubleshooting without breaking the entire unit.
| Purpose | Denomination (A) | Location | Consequences of burnout |
|---|---|---|---|
| Cigarette lighter | 15 | Salon | No power at the outlet |
| Audio system | 10 | Salon | Radio and navigation failure |
| Generator | 80-120 | Under the hood | Battery discharges, lamp lights up |
| Headlights (long range) | 10 | Under the hood | No high beam |
| Stove fan | 30 | Interior/Under the hood | The interior heater does not work |
Please note that denominations may vary depending on the year of issue and the specific market. Always check the numbers with the markings on the fuse itself or the block cover. Using items with the wrong amperage is unacceptable and dangerous.
What to do if you don’t have a fuse of the required rating at hand?
In an emergency, you can temporarily use a lower rated fuse, but only to the nearest store. Under no circumstances should you install an element with a high value or a metal wire - this is guaranteed to lead to a fire or failure of the electronics.
The table also shows the impact of failure of a specific element on the operation of vehicle systems. This helps you know where to start looking if you don't know the exact location of the fuse. For example, if the fan is not working, look for a 30 Amp insert.
Diagnosis of relays and hidden problems
In addition to fuse links, the blocks contain relays that act as electromagnetic switches. Their failure is often accompanied by a characteristic click or a complete lack of response when the device is turned on. Relay diagnostics are more difficult than checking fuses, but can be done independently.
To test the relay, you can use the replacement method. Remove the suspicious element and replace it with a similar one from another circuit, for example, from the sound signal unit. If the device worked, then the problem was in the relay. This method allows you to quickly localize a fault without complex equipment.
- 🔊 Beep - often used as a donor to test other relays.
- 🚨 Fan relay - critical for the operation of the cooling system.
- ⛽ Fuel pump - its failure makes it impossible to start the engine.
Sometimes the problem lies not in the relay itself, but in the oxidation of the contacts in the socket. In such cases, careful cleaning of the contacts with alcohol or a special electrical contact cleaner helps. Be careful not to damage the fragile plastic clips.
Before removing the relay, take a photo of its location and markings. This will help avoid confusion when reinstalling, especially if the unit uses relays of different power but the same size.
If the relay clicks, but the device does not operate, the problem may be in the controlled consumer itself or in the wiring. In this case, you will need a multimeter to check the voltage at the relay output. The absence of voltage upon activation indicates an internal break in the contacts.
Relays often fail due to sparking when opening powerful circuits. Regularly checking and replacing old relays can prevent sudden failure of critical systems such as the cooling fan or fuel pump.
Prevention and maintenance tips
To avoid frequent electrical problems, it is recommended to regularly inspect the mounting blocks. Dust, moisture and vibration can lead to oxidation of contacts and premature failure of elements. Cleaning the units and checking terminal tightness is a simple procedure that will extend the life of the electrical system.
When installing additional equipment such as parking sensors, dash cams or high-power audio systems, always use a separate power line with its own fuse. Never connect high-power loads to standard circuits that are not designed to handle high currents. This is a common cause of blown fuses.
Keep a spare set of fuses of different ratings in the glove compartment or under the seat. This will allow you to quickly fix the problem on the road, without wasting time searching for a store. The kit should include inserts from 5 to 30 Amps, as well as several relays.
How to check a fuse with a multimeter?
Set the multimeter to continuity mode (diode or sound icon). Apply test leads to the two metal contacts on the top of the fuse. If a sound is heard or a “0” appears on the screen, the item is OK. If there is silence and “1”, the fuse has blown.
Pay close attention to the markings on the block covers. Over time, it can wear off due to vibration or cleaning. If the inscriptions have become unreadable, you can apply them yourself with a marker or stick a sticker with a decoding. This will greatly simplify future diagnostics.
Don't ignore overload signals. If a fuse blows for the second time in a row, this is a sure sign of a problem in the circuit. Trying to replace it again without eliminating the cause will lead to more serious consequences. Always look for the root of the problem.
⚠️ Attention: Moisture in the engine compartment is the main enemy of electrics. If you notice signs of corrosion on the fuse box under the hood, take immediate sealing and cleaning measures. Using silicone contact protection spray will help prevent oxidation.
Regularly checking the condition of the wiring at bends and connections is also important. Cracks in the insulation can lead to a short circuit even with good fuses. Pay special attention to areas near hot engine components.
Frequently asked questions (FAQ)
Where is the main fuse box in Nissan Terrano 2?
The main unit in the cabin is located to the left of the steering column, behind the decorative panel. The second unit is located in the engine compartment, next to the battery. Both blocks have covers with a diagram decoding.
What to do if the fuse keeps blowing?
This indicates a short circuit or overload in the circuit. Do not change the fuse rating. Find the device connected to this circuit and disconnect it. If the problem disappears, it is the device that is faulty. If not, wiring diagnostics are required.
Can I use a lower rated fuse?
Technically it is possible, and it is safe for wiring, but the device may not work correctly or turn off during peak loads. This is only acceptable as a temporary measure until the correct item is purchased.
How to check a fuse without a multimeter?
Visually inspect the transparent housing. A burnt-out jumper inside is visible as a rupture or melting. You can also try replacing the suspicious element with a known-good analogue of the same value.
Why did the radio stop working after replacing the fuse?
It is possible that the contact in the holder was damaged when removing the old fuse. Also check that the new element is inserted tightly. In rare cases, the radio may be locked, requiring you to enter a code.