Electrical system Nissan Murano the second generation (Z51 body) is a complex network of nodes that provide operation from lighting to multimedia systems. In the event of a sudden failure of one of the components, the first place for diagnosis is the fuse box. Understanding the structure of this system allows the owner to independently fix a minor breakdown without visiting a service center.
A burnt-out protection element is often not a sign of a serious wiring fault, but the result of a short voltage surge or overload on a specific circuit. However, before proceeding with replacement, it is necessary to accurately determine the cause of the burnout so that the new part does not fail again. In this material we will analyze in detail where the blocks are located, how to read the markings and how to correctly diagnose.
Location of protection units in the car
On Nissan Murano Z51 The power distribution system is divided into two main units, each of which performs its own specific tasks. The first of them is located in the engine compartment, which makes it easily accessible when you need to quickly check the main power circuits. The second unit is located inside the car, protecting more delicate electronic systems.
The engine compartment is located in a black plastic box to the right (passenger side) of the engine. The cover of this unit has a raised surface with an imprint of the fuse symbol. When you remove the cover you will see rows relay blocks and fuses responsible for the operation of the generator, starter, cooling fans and headlights.
The interior protection unit is located to the left of the steering column, behind the removable decorative panel. To access it, you need to open the driver's door and carefully pull the special recess at the end of the panel. Inside are located miniature fuses, protecting the power windows, audio system, airbags and cigarette lighter.
Please note that some trims may have an additional unit in the luggage compartment, but for the basic Z51, inspecting two main components is sufficient.
Scheme and explanation of element markings
Every fuse in the system Nissan Murano is clearly marked indicating its current rating and the circuit being protected. A diagram is usually pasted on the back of the covers of both units, which is your main guide when troubleshooting. If the sticker is lost or worn out, you can use the generally accepted coding given in the technical documentation.
The digital designation on the plastic case indicates the current strength in amperes (A). The higher this value, the more powerful the equipment is protected by this element. For example, the rear window defroster circuit requires significantly more current than the interior light bulb. Using a fuse with an overrated rating is strictly prohibited, as this may lead to a fire in the wiring if overloaded.
- 🔍 🔦 Use a magnifying glass or flashlight to read small inscriptions on the body of the elements, as the markings may be barely noticeable.
- 🛡️ 🚗 Always check the location of the contacts with the diagram on the cover, as the numbering may differ depending on the year of manufacture.
- 🔋 ⚡ Pay special attention to the power fuses in the engine compartment - they are responsible for critical engine components.
It is important to note that some circuits are protected not only by fuse links, but also relay. If the fuse is intact, but the device does not work, the problem may lie in the relay. Visually, a relay differs from a fuse: it has a rectangular shape with six or eight contacts on the bottom.
For accurate diagnosis, it is recommended to have a multimeter or indicator screwdriver on hand. The test allows you to determine the integrity of the metal thread inside the plastic case without the need to remove the element from the socket, which is especially convenient in a tight space under the hood.
Diagnostics and visual inspection
The first step in troubleshooting is a visual inspection. Most fuses are made of translucent plastic, through which you can see the condition of the fuse link. If the metal jumper inside is torn or shows signs of melting, the element must be replaced immediately. This is the simplest and most reliable method for identifying a blown fuse.
However, sometimes the tear may be microscopic and not visible to the naked eye. In such cases, an electrical tester comes to the rescue. Set the device to resistance measurement mode (continuity testing) and attach the probes to the metal contacts of the fuse. A beep or a reading close to zero means the circuit is intact.
⚠️ Warning: Never try to replace a blown fuse with a metal wire or bug. This completely compromises the safety of the electrical system and can lead to a fire in the cabin or engine compartment.
If you find a burnt element, do not rush to immediately insert a new one. First you need to understand the cause of burnout. Often, overload occurs due to a short circuit in the wiring or failure of the device itself (for example, a jammed window lift motor). By simply replacing a fuse, you risk experiencing repeated failure within a few minutes.
During the inspection, also check the condition of the sockets themselves in the block. Over time, the contacts can oxidize or weaken, resulting in poor contact and heating. If the sockets have traces of thermal effects, they must be cleaned or the entire unit replaced, as this is a sign of critical overload.
Replacement procedure and required tools
To replace fuses with Nissan Murano Z51 you will need a minimum set of tools. The car usually comes with a special plastic clamp (tweezers), which is attached to the engine compartment cover or in a special compartment in the passenger compartment. If the tweezers are lost, regular pliers or tweezers can be used, but with metal parts you must be extremely careful not to short out adjacent contacts.
The replacement process begins with removing the faulty element. Take tweezers, grasp the fuse housing and carefully pull it straight up vertically. Do not use excessive force to avoid breaking the plastic feet. After removal, visually check the integrity of the insert to confirm the diagnosis.
☑️ Replacement tools
The new fuse must have exactly the same current rating and color as the failed one. The color coding is standardized: red - 10A, blue - 15A, yellow - 20A and so on. Installing an element with a different color may result in incorrect operation of the electronics or damage to the circuit.
Insert the new fuse into the socket until it clicks. Make sure it fits snugly and doesn't wobble. After this, turn on the ignition and check the operation of the device that did not function previously. If everything is in order, you can close the unit cover and continue operating the vehicle.
If after replacement the fuse blows again instantly, the problem is not in the element itself, but in a short circuit in the wiring. In this case, further independent actions can be dangerous, and professional diagnostics at a specialized stand is required.
Table of main fuses and their purpose
Below is a table with the most commonly used fuses in the passenger compartment and under the hood. This information will help you quickly figure out which element is responsible for which function of your Nissan Murano.
| Number | Denomination (A) | Purpose | Location |
|---|---|---|---|
| 15 | 10 | Audio system, Multimedia | Salon |
| 23 | 20 | Cigarette lighter, 12V socket | Salon |
| 10 | 30 | Power windows | Salon |
| 4 | 40 | Cooling fan | Under the hood |
| 7 | 15 | Generator, Sensors | Under the hood |
Please note that numbering may vary depending on the vehicle year and trim level. Richer versions may have additional fuses for active safety systems, heated seats and mirrors. Always check the current diagram specifically for your VIN.
⚠️ Attention: When replacing the cigarette lighter fuse, make sure that there are no foreign objects (such as chargers) in the outlet that could cause a short circuit when turned on.
For owners who frequently use external electronics, it is especially important to monitor the condition of the fuses in the 12V outlet circuit. Frequent overloads from powerful compressors or heating devices can lead to degradation of contacts and burnout of even a serviceable element.
- For every breakdown
- Once every six months
- Only when changing oil
- I never check
Typical problems and their solutions
One of the most common problems of owners Nissan Murano Z51 is a failure of the cigarette lighter or 12V socket. This is because these circuits are often used to power high-power devices that exceed the fuse rating. If you have connected a compressor or a powerful inverter, tripping the protection is a normal reaction of the system.
Another common problem is the failure of power windows. In this case, a blown fuse may indicate a jammed window lift mechanism or worn out motor. If, after replacing the fuse, the window does not rise again, and the fuse burns out again, it is necessary to check the mechanics of the window lifter.
- 🔧 🔌 Check the condition of the contacts in the cigarette lighter socket for the presence of oxides or soot.
- 🔋 🔋 If the audio system fails, check not only the fuse, but also the ground (grounding) of the device.
- 💡 🔦 If the headlights fail, check not only the fuse, but also the incandescent lamps themselves, since their burnout often causes a surge in current.
Sometimes the problem may be that the fuse is not seated tightly against the contacts due to vibration. In such cases, additional fixation or replacement of the socket helps. If you notice that the fuse is constantly falling out of the block, you need to check the latches on the block cover itself.
Before purchasing a new fuse or relay box, take a photo of the old circuit and the location of the elements on your phone so as not to confuse them during installation.
In rare cases, the fuse may spontaneously ignite without any visible load. This indicates a malfunction of the element itself (defect) or a hidden short circuit in the wiring going to the protected device. In such situations, a complete wiring inspection by a professional electrician is required.
Prevention and maintenance of the electrical system
To minimize the risk of fuse failure, you must follow a few simple operating rules. Do not use devices with a current consumption exceeding 10-15 Amps in a 12V outlet, unless this is provided for by the design of the vehicle. For high-power appliances, use separate wiring with its own fuse.
Inspect the engine compartment regularly for signs of moisture or corrosion. Moisture can get inside the unit through leaks in the lid or due to damage to the seals. Corrosion of the contacts leads to their heating and subsequent burnout of the circuit even under normal load.
Keep a spare set of fuses in the glove compartment or glove box. This will allow you to quickly fix the problem on the road. It is advisable to have a set that includes elements of the main denominations: 5A, 10A, 15A, 20A, 25A and 30A.
What to do if there is no spare fuse of the required rating?
As a last resort, you can temporarily use a lower rated fuse, but it may burn out faster. Using a fuse of a higher rating is strictly prohibited - this is dangerous for the wiring.
If you plan to install additional equipment (alarm system, DVR, parking sensors), be sure to connect it through a separate fuse, and do not “crawl” into existing circuits. This will preserve the car's standard electrical system and simplify diagnostics in the future.
Final Recommendations
Working with fuses on Nissan Murano Z51 does not require deep knowledge of electrical engineering, but requires care and accuracy. Correct diagnosis and timely replacement of burnt out elements will help avoid serious breakdowns and costly repairs. Remember that the electrical system of a car is a single organism, where each element plays an important role.
If you are faced with a complex malfunction that cannot be resolved by replacing the fuse, do not delay in contacting specialists. Modern cars are equipped with many sensors and controllers, and ignoring problems can lead to the failure of important safety systems.
⚠️ Attention: Never use a fuse with a rating higher than that specified in the diagram, even if this seems to be the only way to restore the device. This is a gross violation of operating rules that can cost you your car.
Regular inspection of the electrical system, compliance with the manufacturer's recommendations and the use of high-quality spare parts are the key to long and reliable operation of your Nissan Murano. Take care of your car, and it will serve you faithfully for many years.
Where is the main fuse box located in the Nissan Murano Z51?
There are two main units in the Nissan Murano Z51: one is located in the engine compartment to the right of the engine, the second is in the cabin to the left of the steering column behind the removable panel.
How to identify a blown fuse without a multimeter?
Most fuses have a transparent housing. Visually inspect the metal jumper inside: if it is torn or melted, the element has burned out.
Is it possible to replace the fuse with an analogue one with a different color?
No, the color corresponds to the rated current. Replacing with a fuse of a different color (of a different rating) may lead to overheating of the wiring and a fire.
What should I do if the new fuse immediately blows?
This indicates a short circuit or device malfunction. It is necessary to stop operation and contact an auto electrician to diagnose the wiring.
What tools are needed for replacement?
Usually, the plastic tweezers that come with the car and are attached to the fuse box cover are sufficient. You can also use regular tweezers or forceps.