Fuse box <em>Nissan Cefiro A32</em>: complete diagram, assignment and replacement

Nissan Cefiro A32 (1994–2003) - a legendary business class sedan that is still in demand due to its reliability and comfort. However, even these machines develop electrical problems over time, and most often the fuse box is to blame. If your headlights stop working, the radio does not turn on, or the power window fails, the first thing you need to check is fuses and relays in the mounting block.

In this article you will find detailed fuse box diagram for Cefiro A32 with a breakdown of each element, step-by-step replacement instructions, as well as tips for diagnosing typical faults. We will look at where the block is located, how to properly remove fuses without damage, and what to look for when buying new ones. We will pay special attention fuel pump relay and main ignition circuit fuse - their failure most often leads to the inability to start the engine.

Where is the fuse box located in Nissan Cefiro A32

B Cefiro A32 There are two main fuse blocks installed:

• 🔧 Main unit — located under the hood, next to the battery (driver's side). It is protected by a plastic cover with the inscription FUSE & RELAY BOX.
• 🚗 Additional block — located in the cabin, under the instrument panel on the driver’s side. To access it, you need to unscrew two screws and remove the plastic cover.

The main block contains fuses and relays, responsible for engine operation, lighting and basic electrical circuits. Additional - for comfortable functions (window lifters, radio, cigarette lighter). On some modifications Cefiro A32 (for example, with an engine VQ25DE) a third unit can be installed under the rear seat, but this is rare.

To avoid confusion, remember a simple rule: if the problem is related to ignition, headlights or cooling fan — look for the reason in the main unit under the hood. If they don't work Power windows, heated seats or cigarette lighter — check the interior unit.

Fuse box diagram Nissan Cefiro A32 with transcript

Below is a table with the purpose of each fuse and relay in main block (under the hood). Please note that on different modifications Cefiro A32 (for example, with engines RB20E, RB25DE or VQ25DE) the location may differ slightly, but the general logic remains the same.

Designation	Denomination (A)	Purpose	Symptoms of a problem
F1	10	Engine control circuit (ECU)	Engine does not start, errors P0600-P0606
F2	15	Fuel pump, injectors	Engine stalls, won't start, no fuel pressure
F7	10	Low beam (left headlight)	Low beam on one side does not work
F10	15	Radiator cooling fan	Engine overheating, fan does not turn on
F15	20	Cigarette lighter, 12V socket	The cigarette lighter does not work, it is activated when a load is connected

A complete diagram showing all fuses and relays can be found in repair manual for your modification Cefiro A32. If you don’t have a manual, it doesn’t matter: there is usually a diagram with symbols on the inside of the block cover. However, it will wear off over time, so we recommend printing this chart and keeping it in your glove compartment.

How to check a fuse without a tester?

If you don’t have a multimeter at hand, you can visually inspect the fuse using light: a blown fuse will have a broken thread inside. You can also use the “replacement method” - temporarily install a known-good fuse with the same rating from another circuit (for example, from a radio).

How to check and replace the fuse in Nissan Cefiro A32

Replacing a fuse is a simple procedure, but there are several nuances that will help you avoid mistakes. Here are the step-by-step instructions:

1. Turn off the ignition and remove the negative terminal from the battery (this is mandatory to avoid a short circuit!).
2. Remove the fuse box cover. In the main unit it is secured with two latches; in the interior unit, it may be necessary to unscrew the screws.
3. Find the faulty fuse using the diagram or visually (melted body, broken thread).
4. Remove the fuse with special tweezers (usually attached to the block cover). If you don't have tweezers, you can carefully pry them off with a flat-head screwdriver.
5. Install a new fuse same denomination. Never use bugs or high amperage fuses - this may cause a fire!

If after replacement the fuse blows again, this means that there is short circuit. In this case, you need to check the wiring for damage or contact an auto electrician. This happens especially often with chains. cigarette lighter And window lifters — their wires fray in the doorways.

Typical faults and their causes

Owners Nissan Cefiro A32 often encounter several common problems related to the fuse box. Here are the most common ones:

• ⚡ The fuel pump fuse is blown (F2) - usually the pump itself is to blame (wear of the brushes) or a short circuit in the wiring to it. Also check the fuel pump relay (it's located next to the fuse).
• 💡 Low/high beam does not work - fuses are most often to blame F7 (left headlight) and F8 (right headlight). If the fuses are intact, check the lamps and light relays (R3).
• 🔥 Cigarette lighter fuse (F15) burns out when charging is connected - This is a sign of a faulty 12V outlet. Often the contacts inside it oxidize or short out.
• 🚪 Power windows don't work - check the fuse F20 (20A) in the cabin unit. If it is intact, the problem may be in the motor or power window control unit.

Please note cooling fan relay (R5). If it fails, the engine begins to overheat and the fan does not turn on even at high temperatures. This is one of the most dangerous malfunctions, as it can lead to overheating and deformation of the cylinder head.

What fuses and relays to buy for Cefiro A32

When selecting fuses and relays for Nissan Cefiro A32 It is important to consider several points:

• 🔌 Fuse type - in Cefiro A32 standard blade fuses are used ATO/ATC (mini size). Don't confuse them with MAXI- fuses that are installed in some American cars.
• 📏 Denomination - always take a fuse with the same amperage as the original. For example, if it burned F10 (15A), do not set 20A - it may cause a fire!
• 🔄 Relay - it’s better to buy original ones Nissan (articles are indicated in the manual) or high-quality analogues from Bosch, Hella. Cheap Chinese relays often fail.

Good reviews from brand fuses: Littlefuse, Bussmann, Eaton. They are distinguished by stable quality and reliable contact. Budget options you can consider SAT or ERA, but their resource is lower.

If you are buying a relay, pay attention to it marking. For example, fan relay (R5) should be on 30/40A with normally open contacts. For fuel pump (R2) fits the relay to 20A with delay.

What to do if fuses keep blowing

If you are faced with a situation where fuses in the same circuit blow over and over again, this is a sign of a serious problem. Here is the algorithm of actions:

1. Check consumers in this chain. For example, if the cigarette lighter fuse is constantly on (F15), turn off all devices (chargers, DVRs) and check the socket for a short circuit.
2. Inspect the wiring. Wires often fray at bending points (for example, in door openings for power windows or under the hood near the battery). Use the multimeter in test mode to find the short.
3. Check with the consumer himself. For example, if the fuel pump fuse blows, the pump itself may be stuck and drawing too much current.
4. Contact an auto electrician, if you couldn’t find the reason yourself. In some cases, the problem may be in the control unit (for example, in ECU or comfort block).

It is especially dangerous to ignore the constant blowing of fuses in circuits associated with ignition or fuel system. This can lead not only to damage, but also to a fire. For example, if there is a short circuit in the fuel pump circuit, a spark can ignite gasoline vapors.

Tips for Preventing Fuse Box Problems

To avoid problems with fuses and relays in Nissan Cefiro A32, follow these guidelines:

• 🔋 Check the status of your contacts regularly in the fuse block. Oxidation or corrosion can lead to poor contact and overheating. Clean the contacts with a special liquid (for example, Contact Cleaner).
• 🌧️ Protect the unit from moisture. If the unit cover is damaged, replace it. Water getting on the contacts causes corrosion and short circuits.
• 🔌 Don't overload the circuits. For example, do not connect high-power devices (such as a compressor or inverter) to the cigarette lighter unless it is designed to handle the load.
• 🔍 Check fuses periodically for melting or darkening. Even if they do not burn out, such signs indicate increased load.

If your Cefiro A32 often stands in a damp garage or on the street, it makes sense to treat the contacts of the fuse box dielectric grease. This will prevent oxidation and extend the life of the elements.

We also recommend keeping it in your car. set of spare fuses different ratings (10A, 15A, 20A, 25A). This will help you quickly solve the problem on the road. For convenience, you can use a special plastic box, which is sold in auto stores.

FAQ: Frequently asked questions about the fuse box Nissan Cefiro A32

🔧 Which fuse is responsible for the radio in Cefiro A32?

The fuse controls the radio F25 (10A) in the cabin block. If after replacing it the radio does not work, also check the fuse F30 (15A), which is responsible for the memory circuit (clock, settings).

⚡ Why doesn’t the car start after replacing the fuel pump fuse?

If the fuse is intact, but the fuel pump does not work, check:

• Fuel pump relay (R2) — it should click when you turn on the ignition.
• Power to the pump (check the wiring from the relay to the pump).
• The pump itself may have failed (check the fuel pressure).

💡 Is it possible to install a fuse of a higher rating if it constantly blows?

No, this is extremely dangerous! The fuse is designed for a certain current, and if you set, for example, 20A instead of 10A, this can lead to melted wiring or even a fire. Instead, find and eliminate the cause of the increased current (short circuit or faulty consumer).

🔋 Where is the starter relay located in Cefiro A32?

Starter relay (R1) is located in the main block under the hood. It is responsible for supplying power to the starter solenoid relay. If you hear clicks when you turn the key, but the starter does not turn, check this relay and the contacts on it.

🚗 Why don’t the power windows work on the driver’s side, but work on the passenger side?

This is a typical problem Cefiro A32, connected to the power window control unit. Most often the fuse is to blame F20 (20A) or the unit itself is faulty (located in the driver’s door). Also check the contacts in the connectors - they often oxidize.