Nissan Sunny FB15 (1990–1994) is a legendary Japanese car that is still in use in many countries. Like any car of considerable age, it requires careful attention to electrics. One common problem is blown fuses, which can damage headlights, windshield wipers, or even the ignition system. In this article you will find full fuse diagram for Nissan Sunny FB15, their location, the purpose of each element and practical diagnostic tips.
Feature FB15 — the presence of two mounting blocks: the main one (in the cabin) and the additional one (in the engine compartment). Many owners confuse them or do not know where to look for one or another fuse. We will analyze both blocks and indicate fuse ratings and provide visual diagrams for convenience. You will also learn how to properly check and replace fuses to avoid damaging your vehicle's electrical system.
Where are the fuses located in the Nissan Sunny FB15?
B Nissan Sunny FB15 fuses are distributed over two main blocks:
- 🔧 Main mounting block — located under the dashboard on the driver's side. To access it, open the driver's door and remove the unit cover (it is secured with latches).
- 🚗 Additional block in the engine compartment — located next to the battery, under the plastic cover. High power fuses are located here (for example, for a radiator fan or generator).
Important: in some modifications FB15 (for example, with a diesel engine CD20) the diagram may differ slightly. If your car is equipped with air conditioning or power windows, there will be additional fuses in the blocks.
Before proceeding with replacement, be sure to turn off the ignition and remove the negative terminal from the battery. This will prevent short circuits and damage to the electronics.
- Main (in the cabin)
- Additional (in the engine compartment)
- Both are about the same
- I don't know where they are
Diagram of the main mounting block (interior)
Main fuse block in Nissan Sunny FB15 contains elements responsible for lighting, dashboard, audio system and other consumers. Below is a table with a breakdown of each fuse (the numbers correspond to the markings on the block cover).
| Fuse no. | Denomination (A) | Purpose | Notes |
|---|---|---|---|
| 1 | 10 | Side light bulbs (left side) | Also responsible for the license plate illumination |
| 2 | 10 | Side light bulbs (right side) | If the lamps burn out, check the lamps - they are often the cause |
| 3 | 10 | Low beam (left headlight) | If the fuse blows frequently, check the headlight wiring |
| 4 | 10 | Low beam (right headlight) | — |
| 15 | 15 | Windshield wipers and washers | When replacing this fuse, check the wiper relay (located nearby) |
You can download the complete diagram of all 20 fuses of the main unit at link at the end of the article. Please note: fuses No. 7 (10A) And No. 8 (10A) are responsible for the cigarette lighter and radio. They are most often knocked out due to the use of powerful devices (for example, compressors for inflating tires).
⚠️ Attention: Never install fuses with a rating higher than specified! For example, instead of 10A you cannot use 15A - this may lead to a fire in the wiring.
Additional fuse box in the engine compartment
In the engine compartment Nissan Sunny FB15 There is a block with fuses and high power relays. He is responsible for critical systems:
- ⚡ Generator (fuse
30Aor40A, depending on modification). - 🔥 Radiator fan (fuse
20A+ relay). - 🔋 Fuel pump (fuse
15A, often fails when the fuel level is low). - 💡 Driving lights (fuses
10Afor left and right headlights).
To access this block:
- Open the hood and locate the plastic cover next to the battery (usually black).
- Unclip the clips and remove the cover.
- Refer to the diagram on the inside of the cover or our table below.
| Fuse no. | Denomination (A) | Purpose |
|---|---|---|
| A | 30 | Generator circuit |
| B | 20 | Radiator fan |
| C | 15 | Fuel pump |
| D | 10 | High beam (left headlight) |
| E | 10 | High beam (right headlight) |
If the fuse B (20A) burns out regularly, this may indicate a malfunction of the radiator fan or thermostat. Don't ignore this problem - overheating of the engine will lead to serious repairs.
Before replacing the fuel pump fuse (15A) check the fuel level. If the gas tank is almost empty, the pump works harder, which can cause frequent burnouts.
How to check the fuse in Nissan Sunny FB15?
Checking fuses is a simple procedure that does not require special tools. You will need:
- 🔍 Flashlight (for inspecting the unit in the cabin).
- 🛠️ Tweezers or small pliers (for removing fuses).
- 🔋 Multimeter (optional, for accurate checking).
Verification algorithm:
- Visual inspection: Remove the fuse and look at its metal bridge. If she torn or melted - the fuse has blown.
- Checking with a multimeter: put the device in continuity mode and touch the fuse contacts with the probes. If there is no sound signal, the fuse is faulty.
- Replacement: Install a new fuse same denomination. If it burns out immediately, look for a short in the circuit.
Visually inspect the fuse for melting|
Check with a multimeter in dial mode |
Make sure the new fuse is the same rating|
After replacement, check the operation of the circuit (for example, turn on the headlights) -->
If the fuse blows again, do not rush to install the next one. The reason may lie in:
- 🔌 Short circuit in the wiring (often found in lighting circuits).
- 💡 Consumer malfunctions (for example, windshield wiper motor or fan).
- 🔋 Problems with weight (poor contact on the body).
⚠️ Attention: If traces of melted plastic or burnt contacts are found in the fuse block, do not limit yourself to replacing the fuse. Contact an auto electrician for diagnosis - this is a sign of serious problems in the electrical network.
Frequent problems with fuses in FB15 and their solutions
Owners Nissan Sunny FB15 often encounter typical faults related to fuses. Let's look at the most common cases and ways to eliminate them.
1. The cigarette lighter fuse blows (No. 7 or No. 8, 10A)
Reasons:
- 🔌 Use of powerful devices (compressors, inverters) without an adapter.
- 🔋 Short circuit in the cigarette lighter socket (often due to metal objects).
Solution: Check the cigarette lighter socket for foreign objects. If the problem persists, replace the socket or use a fused power strip.
2. Wiper fuse (No. 15, 15A) crashes when turned on
Reasons:
- 🌧️ Jamming of the windshield wiper mechanism (rust, dirt).
- 🔌 Motor or relay malfunction.
Solution: Remove the plastic protection under the windshield and check the wiper mechanism. Lubricate moving parts. If the motor is faulty, replace it.
3. Radiator fan fuse (20A) burns out in the heat
Reasons:
- 🔥 Thermostat or temperature sensor is faulty.
- 🚗 Short circuit in the fan winding.
Solution: Check the operation of the fan by applying voltage to it directly (12V). If it doesn't spin, replace it. Also check the coolant temperature sensor.
What to do if the generator fuse (30A) burns out immediately after replacement?
This is a serious malfunction that may indicate:
- Breakdown of the diode bridge in the generator.
- Short circuit in the battery charging circuit.
- Malfunction of the voltage regulator relay.
Actions:1. Disconnect the generator from the on-board network and check the fuse - if it does not blow, the problem is in the generator.
2. If the fuse blows again, look for a short in the wiring from the alternator to the battery.
3. Do not operate a vehicle with such a malfunction - it may cause a fire!
Where can I download the complete fuse diagram for Nissan Sunny FB15?
Complete fuse diagram for Nissan Sunny FB15 You can download in high resolution from the links below. We have prepared two options:
- 📄 Scheme in Russian (with decoding and colors of wires).
- 📄 Original diagram in English (from the factory manual).
We also recommend saving the diagram to your phone or printing it out - this will help you quickly find your way in case of a breakdown on the road. If you have a modification with a diesel engine CD20 or an automatic transmission, there will be additional fuses in the circuit (for example, for automatic transmission solenoids).
For convenience, we have placed the diagram in the format PDF And JPG. If you need a diagram for a specific configuration (for example, with an air conditioner), specify this in the comments - we will help you find the current version.
Always keep a spare set of fuses of different ratings (10A, 15A, 20A, 30A) in the glove compartment. This will save time and stress on the road, especially if the fuel pump or generator fuse blows.
FAQ: Frequently asked questions about Nissan Sunny FB15 fuses
Is it possible to replace a fuse with a different rating if you don’t have the right one at hand?
No, this is strictly prohibited! Installing a fuse with a higher rating (for example, 20A instead of 10A) can lead to melted wiring or even a fire. As a last resort, you can temporarily use a fuse with smaller rated (for example, 10A instead of 15A), but replace it with the correct one as soon as possible.
Why does the headlight fuse only blow when the high beams are turned on?
This indicates a problem in the high beam circuit. Most often the culprits are:
- Short circuit in the lamp (check for melting).
- Damage to the wiring from the light switch to the headlight.
- Malfunction of the high beam relay (located in the main unit).
Start by checking the lamps - this is the most common reason.
Where is the starter relay located in Nissan Sunny FB15?
Starter relay in FB15 located in the main mounting block (interior) and is usually marked ST or Starter. It is responsible for supplying voltage to the starter when the key is turned. If you hear clicking noises when starting the engine, but the starter does not turn, check this relay and fuse No. 10 (10A) in the main block.
How can you tell if a relay has blown and not a fuse?
A relay and a fuse have different functions. If the fuse is blown, it can be seen visually (the jumper is broken). The relay is checked like this:
- Remove the relay from the block.
- Shake it - if something rattles inside, the contacts are probably burnt.
- Check the resistance between the contacts with a multimeter
85And86(should be ~50–120 Ohms).
If the relay is faulty, replace it with a known working one (you can temporarily take it from another circuit, for example, windshield wipers).
Is it possible to repair fuses (soldering or twisting)?
Absolutely not! The fuses are designed to blow once when the current is exceeded. Any attempt to “restore” them (by twisting, soldering, foil) will lead to:
- Lack of circuit overload protection.
- Risk of fire in wiring.
- Failure of expensive components (for example, ECU).
Always use only original fuses or high-quality analogues (for example, Littlefuse).