Cars Nissan AD (12 body, 1989–2002) remain popular among owners due to their reliability and ease of maintenance. However, even in such cars, electrical problems periodically arise - from non-working headlights to cigarette lighter failure. In 90% of cases they are to blame blown fuses, which protect circuits from short circuits and overloads.

In this article you will find detailed fuse box diagram for Nissan AD (12 body), their location, the purpose of each element, as well as step-by-step instructions for diagnosis and replacement. We will analyze typical “symptoms” of faults associated with fuses and give advice on how to avoid mistakes during repairs. The information is relevant for all modifications, including sedans and station wagons with gasoline engines GA14, GA16, SR20 and diesel CD20.

Where are the fuses located in Nissan AD (12 body)?

B Nissan AD fuses are located in two main blocks:

  • 🔧 Main unit — located to the left of the steering column, under the instrument panel. Access to it opens after removing the decorative cover (attached with latches).
  • 🔋 Additional relay block — located next to the main unit or under the hood (depending on the year of manufacture). It contains relays for the ignition, starter, cooling fan and other powerful consumers.

On some modifications (for example, with air conditioning or power accessories) there may be third block - it is usually hidden behind the glove compartment or under the driver's seat. To avoid confusion, pay attention to cap markings: They are often marked with a diagram showing the fuse numbers and their purpose.

📊 Where is your additional relay unit located?
  • Under the hood
  • To the left of the steering wheel
  • Behind the glove compartment
  • I don't know
  • Another option

Important: on models after 1995, the fuse diagram may differ due to updated wiring. If your Nissan AD equipped ABS or climate control, check the presence of separate fuses for these systems - they are usually located in an additional unit.

Fuse diagram Nissan AD (12 body) with decoding

Below is basic diagram for most versions Nissan AD (12 body). Check the purpose of the fuses on the label on the unit cover - it may differ depending on the configuration.

Fuse no. Denomination (A) Purpose Symptoms of a problem
1 10 Side lights (left side), license plate light Left side lights do not light up, license plate illumination does not work
5 15 Low beam (right headlight), reverse lamp The low beam on the right does not work, the reverse lights do not light up
10 20 Cigarette lighter, 12V socket The cigarette lighter does not heat up, charging devices does not work
15 10 Audio system, antenna, clock The radio does not turn on, the time settings are lost
20 30 Electric radiator cooling fan Engine overheating, fan does not turn on

Attention: fuse No. 20 (30A) often fails due to a jammed fan or corrosion in the connectors. Before replacing, check the serviceability of the fan itself - if it does not rotate freely, the fuse will burn again.

Complete diagram for models with ABS

On vehicles with ABS, fuses No. 25 (10A) for the ABS unit and fuses No. 27 (15A) for the speed sensors have been added. Their failure may cause the ABS lamp on the dashboard to come on and cause system failure.

How to check the fuse in Nissan AD?

Diagnosing fuses does not require special skills. You will need:

  • 🔦 Flashlight (for inspecting the block in the dark).
  • 🛠️ Tweezers or plastic puller (usually included with the machine).
  • 🔌 Multimeter or test lamp (for an accurate check).

Verification algorithm:

  1. Turn off the ignition and remove the fuse box cover.
  2. Visually inspect the fuses - burnt out will have a broken thread or a melted body.
  3. If visually everything is normal, use the multimeter in dial mode: 
    1. Прикоснитесь щупами к контактам предохранителя.

    2. Если звукового сигнала нет — предохранитель неисправен.

☑️ Checking the fuse with a multimeter

Done: 0 / 5

⚠️ Attention: Never test fuses for sparks - this can damage the car's electronics. Also avoid using fuses with a rating different from that shown in the diagram. For example, installing a fuse on 20A instead of 10A will lead to a risk of fire in the wiring.

Typical faults and their causes

B Nissan AD (12 body) the most common problems associated with fuses are:

  • 💡 The cigarette lighter fuse blows (No. 10, 20A) - usually due to a short circuit in the socket or connection of powerful devices (for example, a compressor). Check the socket contacts for oxidation.
  • 🔥 Frequent blowing of the fan fuse (No. 20, 30A) - indicates a malfunction of the fan motor or relay. Test the circuit for a short circuit.
  • 🚗 Turn signals or hazard lights do not work — check fuse No. 7 (10A) and the turn relay (located in the main unit).
  • 🔊 The radio does not turn on - fuse No. 15 (10A) or problems with the wiring to the audio system are to blame.

If the fuse blows again after replacement, you can't just install a new one - this may cause a fire. It is necessary to find the cause of the short circuit. Common culprits:

  • 🔌 Exposed or frayed wires (especially in doorways).
  • 💦 Corrosion in connectors (for example, in the headlight harness block).
  • 🔋 Faulty consumers (fan, electric window motors).
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If a fuse blows when a specific device (such as headlights) is turned on, unplug that device and test it separately. Often the problem lies in lamps with a broken filament or oxidized socket contacts.

Step-by-step instructions for replacing the fuse

Replacing the fuse in Nissan AD takes no more than 5 minutes. Follow the instructions:

  1. Turn off the ignition and remove the key from the lock. This will prevent short circuits when manipulating the block.
  2. Remove the unit cover — it is attached with plastic latches. Pry it off with a flathead screwdriver if you can't do it with your hands.
  3. Find the faulty fuse according to the diagram (see section above) and remove it with tweezers. Don't pull the wires!
  4. Install a new fuse the same denomination. Do not use “bugs” (homemade jumpers) - this is dangerous.
  5. Check circuit operation. If the fuse blows again, look for a short circuit.

⚠️ Attention: On some Nissan AD after 1998 release, installed in the fuse box mini fuses (type ATO/ATC). They look similar to standard ones, but have a different size. Make sure you buy the right type!

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If the problem persists after replacing the fuse, check the relay on the appropriate circuit. For example, non-functioning headlights may be related not only to the fuse, but also to the low/high beam relay.

Where to buy fuses for Nissan AD?

Fuses for Nissan AD (12 body) are standard blade fuses (type ATO/ATC). You can buy them:

  • 🏬 In auto stores (for example, Autodoc, Exist, IXORA) - cost from 10 to 50 rubles per piece.
  • 🛒 At markets or at auto parts kiosks (usually sold in sets of 10–20 pieces).
  • 🌍 In online stores (AliExpress, Ozon, Wildberries) - convenient if you need a rare denomination (for example, 5A or 30A).

When purchasing, pay attention to:

  • 🔢 Denomination (must match the one indicated in the diagram).
  • 🔧 Housing type - standard (ATO) or mini (ATC).
  • 🏷️ Workmanship - cheap fuses may have a thin bridge that will quickly burn out.

Advice: buy fuse set with the most popular denominations (5A, 10A, 15A, 20A, 30A) - this will save time in the future. Keep them in your glove compartment along with your tweezers.

Frequently asked questions and errors when working with fuses

Even experienced car owners sometimes make mistakes when diagnosing fuses. Let's look at the most common ones:

  • ❌ Ignoring the cause of burnout. If you simply replace the fuse without troubleshooting, it will burn out again. For example, a blown fuse №10 (cigarette lighter) often indicates a short circuit in the socket.
  • ❌ Using bugs. Homemade jumpers made of wire or foil can cause a fire - they are not rated for the current specified for the circuit.
  • ❌ Checking the fuse is live. Always turn off the ignition before removing the fuse to avoid a short circuit.

If you encounter an unusual situation (for example, the fuse blows only when the high beams are on), check:

  • 🔦 Lamp condition — burnt out or low-quality lamps can cause current surges.
  • 🔌 Contacts in blocks - oxidized or burnt contacts increase resistance and heating.
  • 🔋 Relay - a faulty relay can cause voltage surges in the circuit.
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If the fuse blows when the ignition is turned on, the problem may lie in the starter or alternator. In this case, diagnostics at a service station is required.

FAQ: Answers to popular questions

Is it possible to use a fuse with a higher rating if you don’t have the right one on hand?

No! Installing a fuse with a higher rating (for example, 20A instead of 10A) will lead to the risk of overheating of the wiring and fire. If you urgently need to get to the store, temporarily use a fuse with smaller denomination (for example, 7.5A instead of 10A), but drive carefully to avoid putting stress on the faulty chain.

Why does the cigarette lighter fuse blow when the navigator is connected?

Most likely, the problem is in the navigator itself (short circuit in the power supply) or in the cigarette lighter socket (oxidized contacts). Try connecting another device - if the fuse blows again, check the socket for a short circuit with a multimeter. Also make sure that the power of the connected device does not exceed 120 W (maximum for a standard cigarette lighter).

How can you tell if a relay has blown and not a fuse?

The relay and fuse are responsible for the same circuit, but the symptoms of a malfunction are different:

  • If fuse burnt out - it can be seen visually (the thread is broken).
  • If relay faulty - the fuse is intact, but the circuit does not work. Test the relay by swapping it with a known good one (for example, the horn relay).

The cooling fan relay often fails - it can be diagnosed by the absence of a click when the ignition is turned on.

Where to find a fuse diagram for your modification Nissan AD?

The diagram may differ depending on the year of manufacture and configuration. Look for information:

  • 📖 B instruction manual (usually there is a section Fuses and Relays).
  • 🔧 On fuse box cover (the current diagram is often shown there).
  • 🌍 On owner forums (For example, Nissan Club Russia or Drive2).
  • 📱 B mobile applications type AutoData or Haynes Manual.

If there is no diagram, take a photo of the block cover and ask on specialized forums - owners AD They usually help quickly.

What to do if all the fuses are intact, but the circuit does not work?

If fuses and relays are good, check:

  • 🔌 Wiring — test the circuit with a multimeter for an open or short circuit.
  • 🔋 Mass — grounding points on the body often oxidize (especially under the battery).
  • 🔧 Switches - for example, non-working headlights may be associated with a faulty steering column switch.
  • 💡 Consumers - lamps, motors, etc. (for example, a burnt-out lamp can open the circuit).

To diagnose complex faults (for example, problems with ECU) it is better to contact a service station with an auto electrician.