What to do if the cigarette lighter fuse is blown


All modern cars are equipped with this device. Even non-smoking car owners use it. The cigarette lighter socket is used to connect additional devices, i.e. like a 12-volt outlet. Install into the connector:
  • charger for mobile phones, tablets, laptop;
  • additional fan;
  • electric compressor for inflating tires;
  • GPS navigator;
  • DVR.

Failure of the cigarette lighter is fraught with operational inconvenience. Often the cause of failure is the protective element. You can find out why the fuse for the cigarette lighter blows, how to replace it and find out where it is located, where the mounting block is located.

Cigarette lighter fuse

Car protective elements come in different designs.

  1. Cylindrical. Out-of-service cars from the Soviet Union era were equipped with fuses, which are called so. The denomination of the product is engraved on a thin metal bridge.
  2. Strip fuses. They are a metal plate with holes for bolts at the ends. The inconvenience is the complex installation scheme, when it is necessary to tighten each individual element.
  3. Thermal fuses. Reusable elements that operate on the principle of a circuit breaker located in a household network. When the current exceeds, it simply snaps off. In order to restore the network, you should press the corresponding button.
  4. Knife (see photo). The most common fuses for the cigarette lighter, installed on many Russian VAZ models and foreign cars (Focus, Corolla, etc.). Such elements are used in the vast majority of cars.

There are several standards for the size of blade automotive fuses:

  • mini – width 16 mm;
  • midi – 19 mm;
  • maxi – 34 mm.

The element values ​​differ. Each fuse is painted in a corresponding color. There is a unified system of standards:

ColorHow many amperes
Black1
Dark grey2
Lilac3
Pink4
Cream5
Brown7,5
Red10
Light blue15
Yellow20
White25
Green30
Violet35
Orange40
Scarlet50
Blue60
Dark brown70
Citric80
Dark lilac100

How to replace

Replacement of a technical device is carried out using the following tools:

  • a set of screwdrivers of different diameters for self-tapping screws;
  • soldering iron with solder;
  • pliers;
  • gloves;
  • insulating tape;
  • autoelectric drill;
  • new part;
  • additional wiring selected with a suitable cross-sectional diameter;
  • side cutters;
  • a set of drills for working on metal;
  • rosin;
  • files;
  • metal crown;
  • solder;
  • wiring;
  • switch;
  • splitters;
  • pliers;
  • tweezers, etc.

A blown fuse should be replaced. You need to find an element that is suitable in terms of power for the car. For cars of different brands, different protective elements are fixed to the cigarette lighter. Installing components that are not suitable for the vehicle may cause the device to burn out. Then you need to identify the socket and remove the damaged element using pliers.

The element is changed by performing step-by-step actions:

  1. It is necessary to turn off the ignition, then open the hood slightly, remove the minus terminal from the battery pack.
  2. Then you need to remove the cover to view the internal elements responsible for the functioning of the electrical circuit.
  3. The layout of the power supply networks and the location of the fuse are first studied.
  4. Using pliers or special pliers, remove the fuse.
  5. A broken fuse is replaced with an element of the same power.
  6. The device is fixed in the socket.
  7. The lid of the unit is closed, the device is connected to the battery.
  8. The device's performance is then checked.

Why is the Ford Focus 2 restyling cigarette lighter fuse one of the most common causes of car electronics malfunctions? How to check and replace it yourself.

Why does the fuse blow?

The protective element can fail for various reasons. The most common.

  1. Network overvoltage. When connecting one or more powerful devices to the cigarette lighter socket, the current strength of this section of the circuit exceeds the maximum permissible values. To protect the wires from burnout and fire, the cigarette lighter fuse simply blows. The maximum power of connected devices should not exceed the value calculated by the formula P=I*U. Here I is the nominal value, and U is the network voltage (12 volts). The fuse rating for the cigarette lighter is usually from 10 to 25 amperes. This means that the total power of the devices fluctuates between 120-300 watts.
  2. Short circuit. Due to exposed wires, poor contact in the cigarette lighter or other reasons, a short circuit occurs in the network. Because of this, the protective element burns out. If, after replacing the fuse with a new one, a similar breakdown occurs again, then it is worth checking the cables for short circuits.

Replacing the cigarette lighter fuse

Before repairing, you should verify the cause of the breakdown. The fuse responsible for the cigarette lighter is a protective element for other devices. On the Priora it is responsible for the heater fan. In other VAZ models, there is illumination of the glove box or dimensions. If any other devices fail, the protection needs to be replaced.

Changing the cigarette lighter fuse is easy - just get to the mounting block. In each car it is located differently, as a rule, its place is in the cabin, behind the decorative panels, to the right or left of the steering column.

  1. Turn off the engine, open the hood, and remove the negative terminal from the battery. This will open the circuit and prevent a short circuit.
  2. We remove the facing panel, gaining access to the mounting block with fuses and additional relays.
  3. There is a diagram on the back of the cover. Let's find out which fuse goes directly to the cigarette lighter.
  4. We pull it out using tweezers, also located on the mounting block. If you don't have one, you can use small pliers.
  5. We carry out the replacement by installing a new fuse in the mounting block.
  6. We connect the negative contact, turn on the ignition and check the functionality of the device.
  7. We close the mounting block and install the decorative panels back.

How to make a replacement yourself

When the car enthusiast has decided on the location of the fuse, you can move on to the question of how to replace the cigarette lighter fuse yourself. It is worth noting that the procedure does not take much time and the task can be completed without outside help. Even if the car enthusiast does not have professional knowledge and experience in working with the internal structure of the car.

It is enough to follow the following instructions step by step:

First you need to turn off the ignition. Open the hood and remove the negative terminal from the battery;

Having the opportunity to work with the block, determine where the fuse is located. Unscrew the bolts and remove the cover to gain access to the internal elements of the system, which ensure uninterrupted operation of electrical equipment;

On the inside of the cover there is a diagram that will be needed to quickly and efficiently change the PCB. Before starting work, it is recommended to study the circuit as much as possible so as not to cause serious damage to important elements and to understand which design is responsible for the operation of the devices;

Then you can begin to dismantle the PP. Therefore, it is recommended to prepare special tweezers located in the body of the working unit in advance. As an alternative, it is acceptable to use pliers;

when it is necessary to change the PP, it is important to use only blocks that have the same rating. Accordingly, the parts must be marked “20”, which means a voltage rating of 20 Amperes. A fuse operating at this voltage is the most common. However, there are cases when a different indicator is indicated. It is important to comply with this condition in order to avoid malfunctions and difficulties;

First you need to decide whether the software works. If an element fails, this can be seen with the naked eye. The fusible thread will become charred black or broken. Sometimes the plastic casing begins to melt. If such signs are noticed, then in the near future we should expect that the element will stop working. As a rule, when the case begins to melt, this indicates the occurrence of sudden voltage surges or a short circuit. To identify the problem, you need to call the wiring. Typically, the problem most often diagnosed is a broken wire;

install a new part in place of the blown fuse. It doesn’t matter which side is installed, the main thing is to put it in an identical socket;

close the cover of the mounting section, connect the battery. Turn on the ignition and test how well the new element works after installation. If all manipulations are performed correctly, the cigarette lighter will work in the proper order. In the case where the fault was hidden not in the operation of the PP, but, for example, in the wiring, it is recommended to carry out a full diagnosis.

At this point, the task of changing the fuse can be considered completed.

Video help on finding the right fuse

The location of the mounting block and the number of the protective element are different on all models. The video will help you find where the fuse for the cigarette lighter is located. Below is a table with common cars and information on where the mounting block is located.

ModelBlock locationFuse number
KalinaMounting block to the left of the steering column, behind the headlight control panel.F20 (15A)
PrioraBlock on the bottom left. Located at the driver's left foot. To access the block, you need to rotate three locks 90 degrees. F13 (15A)
NivaBlock behind decorative cover. Located near the driver's door. To access the block, unscrew two screws and then slide the cover up. F6 (15A)
FocusBlock under the glove box. It is necessary to pull down the two latches and remove the protective cover. F38 (20A)
CorollaThe block is behind the decorative trim, under the dashboard.F23 (15A)

Block in the cabin

On cars of all years of production, it is located near the driver’s left foot and is covered with a plastic panel.


Appearance

The diagrams and their explanation are given below. The LADA Granta cigarette lighter fuse is designated as follows:

  • 2011-2014 in: F20;
  • 2015: F18;
  • 2016, 2022: F27;
  • 2018 - present v.: F25

For cars assembled in 2011-2014

Circuit breakers

DesignationDenomination, AProtected element
F115Controller; Cooling fan; Ignition coil; Injectors
F230Power window motors
F315Alarm
F420Windshield wiper, airbags
F57.5Ignition switch (pin 15)
F67.5Reversing lamp in the right rear lamp
F77.5Canister purge valve; Sensors: mass air flow, vehicle speed, oxygen concentration
F825Rear window heating element
F95Side lights (right side)
F105Side lights (left side); Illumination of the instrument cluster and switches on the instrument panel
F115Fog lamp in the left rear light
F127.5Low beam headlights, right headlight
F137.5Low beam headlights, left headlight
F1410High beam headlights, right headlight
F1510High beam headlights, left headlight
F16Not used (until 2013)
10PTF right (since 2013)
F17Not used (until 2013)
10PTF left (since 2013)
F18Not used (until 2013)
15Heated seats (since 2013)
F19Not used (until 2013)
10ABS/ESC
F2015Sound signal; Instrument cluster; Cigarette lighter; Diagnostic connector; Electric trunk lock
F2115Fuel pump
F2215central locking
F2310Daytime Running Lights
F24Not used (reserve)
F2510Main and additional brake lights; Interior lighting
F26Not used (reserve)
F27 - F30Spare fuse
F31Not used (reserve)
F3230Heater fan motor and electric power steering control circuits

Relay

DesignationProtected element
K1Cooling fan motor
K2Power window motors
K3Starter
K4Low and high beam headlights; Daytime Running Lights; Heated rear window; Heater fan motor; Windshield cleaner and washer
K5Turn signal lamps
K6Windshield wiper motor
K7High beam headlights
K8Sound signal
K9dipped headlights
K10Heated rear window
K11Engine ECU
K12Fuel pump

For cars assembled in 2015

In 2015, there were 2 versions of the interior fuse box in the LADA Granta: from ABAR and Delphi. Their diagrams and explanations are given below.


AVAR block diagram


Delphi block diagram

Circuit breakers

DesignationDenomination, AProtected Circuits
F115Ignition coils; Injectors; Engine Control System Controller
F25(1)Daytime Running Lights
25(2)Central body electronics unit; Driver door module
F310(1)Alarm
10(2)Automatic transmission control controller; Automatic gearbox control drive
F410Airbag system controller
F57.5Terminal 15 devices
F67.5(1)Reversing light; Direction indicators
7,5(2)Reversing light; Automatic transmission control controller; Safe parking system control unit
F77.5Canister purge valve; Sensors: mass air flow/pressure, phases, oxygen concentration
F825Heated rear window(1) Heated rear window and outside mirrors(2)
F95Side lights (right side)
F105Side lights (left side); Illumination of instruments and keys; License plate lights; Luggage and glove box lighting
F115Rear fog lights
F1210Low beam (right headlight); Electrical corrector for right headlight
F1310Low beam (left headlight); Left headlight electric corrector
F1410High beam (right headlight)
F1510High beam (left headlight)
F1610Fog lights, right(2)
F1710Fog lights, left(2)
F1820Front seat heaters; Cigarette lighter
F1915Door locking motors(1)
5ABS(2)
F2015Sound signal
F2110Fuel pump
F2215(1)Washers, windshield and rear window cleaners;
25(2)Central body electronics unit;
F2225(2)Central body electronics unit; Washer, rear window cleaner
F235Instrument cluster; Diagnostic connector
F247.5(2)Air conditioning compressor clutch; Automatic climate control system controller
F257.5(1)Brake signals; Interior lighting
7,5(2)Brake signals
F2610(2)Central body electronics unit
F31 (for the pre-function block AVAR) F27 (for the pre-function block Delphi)30Power windows for front doors(1)
25ABS(2)
F32 (for the pre-function block AVAR) F28 (for the pre-function block Delphi)30(1)Electric heater fan
30(2)Electric heater fan; Automatic climate control system controller

Relay

DesignationProtected Circuits
K1Electric radiator cooling fans
K2Power windows(1) Electric radiator cooling fans(2)
K3Additional starter relay
K4Ignition switch unloading relay
K5Turn signals and hazard warning lights(1)
K6Windshield wiper(1) Heated seats(2)
K7High beam headlights
K8Sound signal
K9dipped headlights
K10Heated rear window; Heated exterior mirrors(2)
K11Engine ECU
K12Fuel pump
K13Additional hazard warning lights(1) Reversing lights(2)
K14Additional hazard warning lights(1) Electric radiator cooling fans(2)
K15Heated windshield(2)
K16
K17A/C electromagnetic clutch(2)

Note to the table:

  • (1): “Standard” package;
  • (2): “Norma”, “Lux” configurations.

For cars assembled in 2016, 2022

Circuit breakers

DesignationDenomination, AProtected Circuits
F115Ignition coils; Injectors; Engine Control System Controller
F230Central body electronics unit(3)
F315(1),(2)Alarm
10(3)Central body electronics unit; Light switch
F420(1),(2)Windshield washer and wiper
15(3)Airbags; Rain sensor
F57.5Terminal 15 devices
F67.5(1),(2)Reversing light; Direction indicators
7.5(3)Reversing light; Safe parking system
F77.5Canister purge valve; Sensors: mass air flow/pressure, phases, oxygen concentration; Tire pressure monitoring system(2),(3)
F8Reserve
F95Side lights (right side)
F105Side lights (left side); Illumination of instruments and keys; License plate lights; Trunk lighting; Glove compartment lighting(2),(3)
F115Rear fog lights
F1210Low beam headlights (right headlight)
F1310Low beam headlights (left headlight)
F1415Cartridge for connecting additional devices in the trunk
F1510Rear window wiper and washer (optional)
F165Driver door module(3)
F17-F20Reserve
F2110High beam headlights (left headlight)
F2210High beam headlights (right headlight)
F2310Fog lamp (right)
F2410Fog lamp (left)
F2515Heated front seats(2),(3)
F265ABS/ECS
F2715Cigarette lighter
F2815Fuel pump
F2915Motor gearboxes for locking doors and trunk(1),(2)
20Central body electronics unit; windshield cleaner and washer(3)
F3010Daytime running lights(1),(2)
F317.5A/C compressor clutch(2),(3)
F327.5Brake signal; Automatic transmission control controller(2),(3); Interior lighting(1),(2)
F3325ABS/ECS
F345Instrument cluster; Diagnostic connector
F3515Airbags(1),(2)
F3610Sound signal
F3710Multimedia system
F38-F40Reserve
F4150Heated windshield(2),(3)
F4230Power windows for front doors(2)
F4350Robotic gearbox control controller
F4430Electric heater fan; Air conditioning control system controller(2),(3)
F4525Heated rear window Heated outside mirrors(2),(3)
F46Reserve

Relay

DesignationProtected Circuits
K1Ignition switch unloading relay
K2Starter
K3Windshield wiper(1),(2); Radiator cooling fan(3)
K4Electric radiator cooling fan; Turn signals and hazard warning lights(1),(2)
K5A/C compressor clutch(3)
K6Front power windows(2) Heated rear window and outside mirrors(3)
K7High beam headlights
K8Sound signal
K9dipped headlights
K10Reversing light(2),(3)
K11Engine ECU
K12Fuel pump
K13Heated seats(2),(3)
K14Heated windshield(2),(3)
K15Heated rear window and exterior mirrors(1),(2)
K16A/C compressor clutch(2)
K17Reserve
K18Radiator cooling fan(2)

Note on tables:

  • (1): “Standard” package;
  • (2): “Norma” package;
  • (3): “Lux” package.

For cars assembled from 2022

Circuit breakers

DesignationDenomination, AProtected element
F115Electric radiator fan (minimum speed) (version with air conditioning or climate control system); Electric radiator fan (maximum speed); Air conditioning compressor clutch (cars with air conditioning or climate control); Engine ECU; Injectors; Ignition coils 2×2 (for 8-valve internal combustion engines); Ignition coils (for 16-valve internal combustion engines)
F27.5Intake pipe damper valve (for engine 21127); Canister purge valve; Oxygen, phase sensors (for 16-valve engines), mass air flow (for 8-valve internal combustion engines or 16-valve engines 21126); AMT selector (version with AMT controller); Tire pressure monitoring system
F35ABS/ECS
F415Airbags
F57.5Automatic Transmission Starter/Controller; Ignition switch unloading relay; Heated windshield and rear window; Seat heating; Fuel pump; ECU for electrically heated windshield; Engine ECU; Audio system; Electric power steering ECU; Wiper switch; Central body electronics unit; Terminal block "ERA-GLONASS"; Clutch pedal switch (for manual transmission); Brake pedal switch; Instrument cluster; Door lock system; Driver's door lock switch; Air conditioner switch; Automatic transmission speed sensor; Automatic transmission mode switch; AMT controller; Tire pressure monitoring system
F67.5Reversing light; Direction indicators; Parking system ECU
F710High beam (right)
F810High beam (left
F95Side lights (right side)
F105Side lights (left side); License plate lights; Trunk light; Illumination of instruments and keys
F115Rear fog lights
F1210Low beam (right); Electric headlight corrector
F1310Low beam (left); Electric headlight corrector
F1420ACentral body electronics unit; Cleaner, windshield washer; Steering column wiper switch
F1510Cleaner, rear window washer
F165Audio system; Ignition switch unloading relay
F175Door lock system
F185Heated mirrors
F19, F20Reserve
F2115Fuel pump
F227.5Brake light switch
F227.5Main and additional brake lights; ABS/ECS; AMT controller
F235Instrument cluster; Diagnostic connector
F2410Sound signal
F2515Cartridge for connecting additional consumers in the passenger compartment/Cigarette lighter
F265Terminal block "ERA-GLONASS"
F2710Fog lamp (right)
F2810Fog lamp (left)
F2915Heated front seats
F3010Audio system
F3110Direction indicators; Power supply for body electronics unit; Daytime Running Lights
F3230Central body electronics unit: electric windows; Door and trunk locks; Rain sensor; Interior, glove box and trunk lighting
F335Driver door module
F347.5Air conditioning compressor clutch (version with air conditioning or climate control system); Automatic climate control system controller
F3515Automatic transmission controller; Automatic transmission control drive
F3615Alarm
F3715Trunk lock actuator switch; Trunk lock actuator control relay; Trunk lighting; Door lock control unit
5Trunk lock actuator switch; Trunk lighting
25Trunk lock actuator switch; Trunk lock actuator control relay; Trunk lighting; Door lock control unit
F3810Daytime Running Lights
F3915Cartridge for connecting additional consumers in the trunk
F4010Trailer
F4150Heated windshield
F4230Heated rear window and exterior mirrors
F4350AMT controller
F4430Electric heater fan; Automatic climate control system controller
F4530Power windows for front doors; Exterior mirror control
F46Reserve

Relay

No. on the diagramDenomination, APurpose
K150AIgnition switch unloading relay
K230AStarter
K330AWindshield wiper; Autostart (optional)
K430AElectric radiator fan of maximum speed (optional)
K530ATurns and hazard warning lights; K15A (autostart) (in variant version)
K630AHeated rear window
K720AHigh beam headlights
K820ASound signal
K920Adipped headlights
K1020AAir conditioning compressor clutch (version with air conditioning or climate control)
K1120AECM main relay
K1220AFuel pump
K1320AHeated seats (optional)
K1470AHeated windshield (optional)
K1520ATurning on the alarm
K1630AAlarm power supply; Turning on the reverse lamp (optional)
K1730AElectric windows; Radiator fan in autostart mode (optional)
K1830AMinimum speed radiator fan (optional)

Other causes of cigarette lighter failure

There are other factors besides a blown fuse. Common.

  1. Burnt out heating coil. Inside the metal cigarette lighter socket there is a nichrome spiral that is exposed to heat. Due to age, she burns out. The breakdown can be corrected by purchasing and installing a new part.
  2. Bad contacts. As they age, they develop plaque or rust. Because of this, the circuit remains open. Repairs are carried out using a needle file. After disassembling the device, it is necessary to clean all contact points, ridding them of traces of plaque or rust.
  3. Short circuit. Broken cigarette lighter wires, broken or fallen solders, or burnt insulation can lead to a short circuit and failure. All cables should be inspected for external damage, use a multitester to test the wires.
  4. Burnt out cigarette lighter light bulb. A light filter is installed around the nest for easy searching in the dark. The bulb inside may burn out with age. In this case, it is necessary to disassemble the device and replace the light bulb with a new one.

What fuse goes to the cigarette lighter?

A hint that it is the protective element that has burned out will be the failure of a number of adjacent devices. The cigarette lighter fuse on many models is also responsible for the signal, side light or heater fan. If several devices fail, then the protective element must be replaced.

The instruction manual or the back cover of the mounting block will help you determine which fuse is responsible for the cigarette lighter. There are pictograms here, as well as the value of the element. It is important to purchase and install a fuse rated for the specified amperage. Otherwise, there is a high risk of a short circuit, melting of the wire insulation, and a fire.

Let's sum it up

Repairing a car's electrical system is the most complex procedure, which often forces car owners to spend a lot of money. It is often very difficult even for electricians to find any solutions to the problem. Given the complexity of the interconnections, virtually any fuse can affect the operation of a specific device in the electrical system.

However, you should approach this issue taking into account the manufacturer's requirements, without performing overly complex repair processes yourself. Otherwise, you may make problems worse and increase the cost of resolving them. Even if the fuses are selected correctly, this may not solve the problem, but only delay the time for its elimination. If you have had problems with the fuse box in your car, please describe them in the comments.

Why does the cigarette lighter not work after replacing the fuse?

If the protective element is working, but the device is not functioning, then you should look at other aspects. Initially, you need to check the reliability of the cigarette lighter in the socket, as well as the presence of oxides on the contacts. They should be bent and cleaned.

It is important to check the serviceability and integrity of the cigarette lighter wires. The connection diagram is implemented as follows. There are three wires going to the cigarette lighter.

  1. Red. Constant plus. Connected via a fuse directly to the battery.
  2. Yellow. Constant plus. Responsible for the backlight lamp of the device.
  3. Black. Negative, coming to the body of the product. The second end is the mass going to the car body.

Using a tester, you should check the integrity of all wires.

Other reasons:

  1. Burnt out spiral. Such a malfunction can be diagnosed with the naked eye. Fixed by replacing the device.
  2. Short circuit. Measure the battery voltage with the ignition off. Turn it on and try again. If there is a drop of more than 0.5 volts, then you should look for a breakdown using a multitester.

Checking the cigarette lighter wiring

It is necessary to check the integrity of the cigarette lighter wiring. First of all, pay attention to the connectors located near the passenger’s left leg; they should be inserted tightly. Then make sure that the connector on the cigarette lighter itself is not disconnected.

Also make sure that the mounting block is in good condition. Based on the results of the check, the wiring to the cigarette lighter can be connected from Ш5-3 mounting block to the +12V connector of the cigarette lighter.


If the wiring is intact, and the fault lies in the cigarette lighter itself (for example, it shorts out), then only replacing it with a new one will help.

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