Why the cigarette lighter does not work in the ŠKODA Octavia Tour: diagnostics and repair

Cigarette lighter in ŠKODA Octavia Tour - one of the most popular interior elements, especially if you actively use gadgets, a navigator or chargers. Its sudden failure can cause a lot of inconvenience: from the inability to recharge the phone to problems with the operation of the DVR. But before you go to the service center, you should figure out the possible causes yourself - in 80% of cases, the malfunction is eliminated without complex repairs.

In this article we will look at all possible reasons, due to which the cigarette lighter stops working: from a banal fuse blown to hidden problems with the wiring. You will learn how diagnose a malfunction using a multimeter, where is the fuse box in Octavia Tour different generations, and what to do if the socket gets knocked out when connecting devices. We will pay special attention a typical problem for 2015–2019 models - oxidation of contacts in the cigarette lighter connector due to moisture entering through the ventilation holes.

1. First steps: checking the fuse

Start with the simplest thing - checking the fuse. B ŠKODA Octavia Tour (including restyled versions A7 and A8) the cigarette lighter is protected by a separate fuse, which may blow due to a power surge or short circuit. Its denomination is usually 15–20 A, but the exact data depends on the year of manufacture.

Where to look for the fuse box?

• 🔧 Octavia Tour A5 (2004–2013): the block is located to the left of the steering column, behind the plastic cover. Cigarette lighter fuse - S27 (15 A).
• 🔧 Octavia Tour A7 (2013–2020): The unit is hidden under the glove compartment (open it and remove the cover). The fuse you are looking for is SC20 (20 A).
• 🔧 Octavia Tour A8 (2020–present): The unit is located in the niche of the front panel on the driver's side. Fuse - SB35 (15 A).

How to check a fuse without a multimeter? It is enough to visually inspect it for metal thread breakage inside. If the thread is intact, but the cigarette lighter still does not work, the problem may lie in the socket itself or the wiring. Never replace a fuse with a stronger one. - this may cause a fire!

⚠️ Attention: If the new fuse immediately blows when the device is connected, this indicates a short circuit in the circuit. In this case, further diagnostics require professional equipment.

2. Diagnosis of the cigarette lighter socket: oxidation and mechanical damage

If the fuse is good, the next “weak link” is the cigarette lighter socket itself. B Octavia Tour it often fails due to:

• 💧 Oxidation of contacts (especially relevant for cars with mileage >100 thousand km).
• 🔌 Connector looseness due to frequent connections/disconnections of devices.
• 🔥 Burnt contacts when using powerful consumers (for example, car refrigerators).

How to check the socket?

1. Disconnect the negative terminal of the battery (required!).
2. Remove the decorative trim around the cigarette lighter (usually it is secured with latches).
3. Disconnect the power connector from the socket and inspect the contacts for darkening, green coating (oxide) or melting.
4. Test the circuit with a multimeter: the resistance between “+” and “ground” should be close to zero.

If the contacts are oxidized, they can be cleaned alcohol solution or special contact liquid (for example, Kontakt 60). In case of mechanical damage (cracks, melting), the socket must be replaced. The cost of a new original connector for Octavia Tour - from 800 to 1,500 rubles.

3. Wiring problems: open or short circuit

If the fuse and socket are good but the cigarette lighter still does not work, the culprit may be damaged wiring. B ŠKODA Octavia Tour The wires to the cigarette lighter run under the center console and often fray or break due to:

• 🚗 Inaccurate installation of additional equipment (for example, alarms or radios).
• 🔧 Moisture ingress through the ventilation holes (relevant for used cars).
• 🐭 Damage by rodents (if the car was parked on the street for a long time).

How to check the wiring?

1. Remove the center console (you will need a plastic spatula and a Phillips screwdriver).
2. Locate the wiring harness that goes to the cigarette lighter (usually marked red (+12V) and black (ground) wires).
3. Test the circuit with a multimeter in resistance test mode. Break will show endless resistance, short circuit - close to zero.

Typical “sore spots”:

Model	Weak spot	Reason
Octavia Tour A5	Wiring under the glove compartment	Rubbing against metal frame
Octavia Tour A7	Connector behind the cigarette lighter	Oxidation due to condensation
Octavia Tour A8	Harness under center console	Damage when installing wireless charging

⚠️ Attention: If when checking the wiring you find melted insulation, do not try to restore it with electrical tape! This is a temporary solution and may cause a fire. In this case, a complete replacement of the harness is required.

4. Problems with mass: why does the cigarette lighter work “every time”

If the cigarette lighter sometimes works, sometimes it doesn’t, or devices are connected only in a certain position, the problem may lie in poor contact with ground. B ŠKODA Octavia Tour The “mass” of the cigarette lighter is often attached to the body under the center console, and over time this compound weakens or oxidizes.

How do you check the mass?

1. Find the mass attachment point (usually a bolt on the body under a plastic lining).
2. Unscrew the bolt and clear the contact area sandpaper or metal brush.
3. Tighten the bolt with effort (but do not overdo it so as not to break the thread).
4. Check the voltage on the socket of the lighter when the ignition is turned on - it should be 12–14 V.

If after cleaning the contact the problem remained, perhaps the mass "went" to another section of the body. In this case, you will need to lay an additional mass wire from the socket of the cigarette lighter directly to the battery (wire cross-section - at least 1.5 mm2).

5. Failures in the body control unit (BCM)

In rare cases, the cause of a non-working cigarette lighter can be Failure in the body control unit (Body Control Module, BCM). This is relevant for Octavia Tour A7/A8where the lighter is controlled via a CAN bus. Signs of a BCM problem:

• 🚨 The cigarette lighter does not work, but the fuse and wiring are fine.
• 🔄 Other electrical functions of the cabin (for example, lighting or windows) also fail.
• 📛 Errors appear on the dashboard related to CAN bus or Bordnetz.

How to diagnose BCM?

This will require diagnostic scanner (for example, VCDS or OBDeleven). Connect it to the OBD-II connector and check for errors at the address 09 — Cent. Elect.. Typical fault codes:

• B114A - malfunction of the lighter chain.
• U1121 - loss of communication with the module.
• B105F - short circuit to ground.

If the errors are related to BCM, you will need to flash the block or replace it. It is not recommended to do this on your own - it is better to contact an official dealer. ŠKODA or a trusted service with experience with MQB platform.

What if the scanner can’t see BCM?

If the diagnostic scanner does not detect the body control unit, this may indicate a CAN bus break or a complete failure of the BCM. In this case, a check of the power supply of the unit (fuse) is required S10 in Octavia A7) and the integrity of the wiring to the BCM connector (usually located behind the dashboard).

6. External devices as a cause of malfunction

Often the culprit of a non-working cigarette lighter becomes plug-inEspecially cheap or powerful. V ŠKODA Octavia Tour typical "pests":

• 🔌 Car refrigerators (consuming up to 60 watts, can cause voltage drawdown).
• 📱 Fast chargers with a current >2.4 A (overheating the socket contacts).
• 🎵 Sound amplifiers (Can create a short circuit in poor insulation).
• 🚗 Video recorders with unstable PD (causes tension surges).

How to check?

Disconnect all devices from the lighter and check its operation with knowingly good consumer (e.g., the standard charger from ŠKODA). If the lighter has earned - the problem is in one of the external gadgets. To identify the “culprit”, connect the devices one by one and monitor the reaction.

If you use powerful consumers frequently (such as a car vacuum cleaner), consider installing a car. extra socket of the lighter with a separate fuse. This will reduce the load on the standard chain and prolong the life of the original connector.

7. When to contact the service: difficult cases

If you have tried all the above methods, but the lighter still does not work, it is time to contact the professionals. Here are some signs that the problem is more serious than it seems:

• 🔥 The fuse blows immediately after replacement (short circuit in the circuit).
• 📉 Tension in the nest "floating" 10 to 14 V is a sign of problems with the generator or battery.
• 🚗 Other electrical components are not working. (e.g., seat heating or audio system)
• 🔧 The cigarette lighter sparkles or warms even without load.

The service will carry out full diagnostics using an oscilloscope, check the integrity of the CAN bus and, if necessary, replace damaged wiring sections or the BCM unit. Average cost of diagnosis in official services ŠKODA — from 1,500 to 3,000 rubles.

If your Octavia Tour As a guarantee, do not try to repair the lighter yourself! Opening the panel or replacing the fuse is not according to the regulations can deprive you of warranty service.

FAQ: Frequently asked questions about the cigarette lighter in the ŠKODA Octavia Tour

Can I use the cigarette lighter to connect the compressor?

Yes, but with reservations. Tyre pumping compressors typically consume 120-150 watts, which is close to the maximum load on the cigarette lighter chain. Do not use the compressor for longer than 10-15 minutes in a rowTo avoid overheating. It is better to connect it directly to the battery through the "crocodiles".

Why does the cigarette lighter only work when the ignition is on?

This is normal behavior for Octavia Tour. In most modern cars, the lighter is powered from the chain IGN (ignition) not from a constant +B. Thus, the manufacturer reduces the risk of battery discharge. If you need the socket to work always, you can reconnect it to a permanent plus, but that requires modification of the wiring.

Which fuse is responsible for the lighter on the 2018 Octavia Tour?

B ŠKODA Octavia Tour A7 2018 release for the lighter is responsible for the fuse SC20 20 A. nominal. It is located in the safety lock box under the glove compartment (position 20).

Is it possible to install a second cigarette lighter in the trunk?

Yes, but this will require a separate line from the battery through the fuse (15-20 A) and relay (if you need control from the ignition). Use a wire cross section of at least 2.5 mm2. In the trunk. Octavia Tour Combi It is convenient to place the nest in the niche behind the back of the rear seat.

Why does the lighter switch off when you connect the phone?

This is a sign voltage sags Due to a weak battery or poor mass. Check the voltage at the battery terminals with the engine running - it should be 13.8-14.4 V. If below, a battery replacement or generator diagnosis is required. It could also be a cause. substandard USB adapter High-current initiation.