The light in the trunk of the ŠKODA Octavia A5 does not work: 7 reasons and how to fix it yourself

You opened the trunk ŠKODA Octavia A5 (2004–2013), but the light inside doesn't come on? The problem is familiar to many owners of this model - especially after 100,000 km. In most cases, the malfunction is associated with a banal burnout of a light bulb or oxidation of contacts, but sometimes more serious breakdowns are to blame: from a failed trunk lid position sensor until the wiring is damaged.

In this article we will look at all the possible reasons why the light in the trunk does not work. Octavia A5, - from the simplest to the rarest. You will learn how to check a fuse, replace a lamp, test a sensor, and even repair broken wiring without visiting a service center. For convenience, we present step-by-step instructions with photos, connection diagrams and lamp compatibility table. If you are not an auto electrician, don’t worry: 80% of breakdowns are solved in 15 minutes with a minimum set of tools.

1. Checking the light bulb is the first diagnostic step

Let's start with the most obvious: in 60% of cases the light is in the trunk. Octavia A5 does not work due to a burnt out lamp. This model uses a standard type lamp C5W (5 W) or its LED equivalent. To check its status:

1. Open the trunk and find the courtesy light (located on the left or center under the lid trim).
2. Carefully pry up the lampshade with a flat screwdriver or a plastic spatula - it is secured with latches.
3. Remove the lamp by pulling it towards you (in some versions you need to turn it counterclockwise).

Pay attention to the condition of the base: if there is a black coating or melted areas on it, the lamp has definitely burned out. Also check cartridge contacts - they often oxidize, resulting in a poor connection. To clean, use fine sandpaper or WD-40.

Prepare a new C5W lamp (or LED equivalent)

Flat screwdriver or plastic spatula

Gloves (to avoid leaving greasy marks on the lamp glass)

Multimeter (optional, for checking the circuit) -->

If the light still does not come on after replacing the lamp, proceed to checking the fuse. But before that, make sure that trunk lid is fully open — in Octavia A5 The response sensor sometimes “glitches” when opened incompletely.

2. Fuse F36: where is it located and how to check

For trunk lighting ŠKODA Octavia A5 fuse responds F36 (10 A), located in fuse box under the steering wheel. To get to it:

1. Open the fuse box cover (it is located to the left of the steering column, under the plastic panel).
2. Find the fuse F36 — its position is indicated on the back of the block cover.
3. Remove the fuse with tweezers or pliers and check it visually (a blown fuse will result in a broken thread) or with a multimeter.

If the fuse is good, but the light still does not work, check relay J317 (it is responsible for controlling the trunk lighting). The relay is located in the same block, but its malfunction is extremely rare. More often than not, the problem lies in oxidation of fuse or relay contacts - they need to be cleaned and treated with contact lubricant.

element	Denomination	Location	Symptoms of a problem
Fuse F36	10 A	Block under the steering wheel	Burns out during short circuit or voltage surges
Relay J317	—	Block under the steering wheel	Clicks but the light doesn't turn on
C5W lamp	5 W	Lamp in the trunk	The filament is broken, the base is melted

I replaced the light bulb, but it didn’t help|Checked fuse F36|Removed the lampshade for diagnostics|Did nothing, looking for the cause|Another option-->

3. Trunk lid position sensor: how it works and why it breaks

B Octavia A5 responsible for turning on the light in the trunk limit switch (sensor), which is triggered when the lid is opened. It is located on right side of the body (when viewed from behind) and is a small button with a spring. When the lid is closed, the sensor is pressed; when opened, it opens, closing the lighting circuit.

Typical sensor problems:

• 🔧 Oxidation of contacts - due to moisture or dirt.
• 🔧 Mechanical wear — the spring loses its elasticity, the button cannot be pressed.
• 🔧 Broken wiring — the wires to the sensor often rub against the body.
• 🔧 Water ingress - leads to corrosion and short circuit.

To check the sensor:

1. Open the trunk and find the sensor (it is attached to the body with one bolt).
2. Disconnect the connector and check the resistance with a multimeter: when the button is pressed, there should be 0 ohm, when released - infinity.
3. If the sensor is faulty, replace it (original part number: 1K0 945 507).

How to temporarily fool the sensor so that the light is always on?

If you urgently need to use the trunk, and the sensor is broken, you can close its contacts in the connector with a piece of wire. However, this will lead to constant operation of the lamp and drain the battery!

If the sensor is working, but the light still does not turn on, the problem may be wiring or comfort block (we'll talk about it later).

4. Wiring and connectors: where to look for a cliff or corrosion

Wiring to trunk light in Octavia A5 passes through corrugated hose between the body and the cover. Over time, the wires fray and the connectors oxidize - especially if the machine is often used in wet weather. Here's how to test the circuit:

Step 1. Checking the voltage on the lampshade

• Remove the lampshade (as described in the first section).
• Turn on the ignition and open the trunk.
• Using a multimeter, measure the voltage at the lamp contacts: it should be 12 V.

If there is no voltage, the problem is in the wiring. If there is voltage, but the lamp does not light, the lamp itself is faulty (for example, the contact inside has come loose).

Step 2. Finding a cliff

Breaks most often occur in two places:

1. In the corrugation between the body and the trunk lid (the wires fray when opening/closing).
2. In the connector of the cover position sensor (oxidation or rotting of contacts).

For repair:

• 🔧 Strip and insulate damaged wires.
• 🔧 Replace the sensor connector (part number: 8E0 973 703).
• 🔧 Use heat shrink tubing to protect connections.

5. Comfort unit (J393): when the electronics are at fault

If all the previous steps failed, the problem may lie in comfort block (J393). This module controls interior lighting, trunk lighting, central locking and other functions. B Octavia A5 it is located behind the dashboard, to the left of the steering column.

Signs of a malfunctioning comfort unit:

• 🚨 Not only does the light in the trunk not work, but also the interior lighting.
• 🚨 The central locking is delayed or does not work.
• 🚨 Fuse F36 regularly blows for no apparent reason.

It is difficult to repair the comfort unit yourself - diagnostics with a scanner is required (for example, VCDS) and soldering of microcircuits. However, you can try:

1. Reset unit errors by disconnecting the battery for 10 minutes.
2. Check the unit connectors for oxidation (they often collect condensation).
3. Contact the service to reflash or replace the unit (the original costs ~15,000 rubles, analogs - from 5,000 rubles).

6. Replacing the trunk light: step-by-step instructions

If the lampshade is faulty (for example, the contacts have melted or the glass has cracked), it must be replaced. B Octavia A5 Two types of lampshades are used:

• 💡 Standard (item: 1K0 947 415) - with one C5W lamp.
• 💡 With two lamps (item: 1K0 947 416) - in configurations with an enlarged trunk.

Replacement Tools:

• Flathead screwdriver or plastic spatula.
• New lampshade (cost ~800–1,500 rubles).
• Terminal block for disconnecting the connector (optional).

Step by step replacement:

1. Open the trunk and find the lamp (it is secured with two latches).
2. Carefully pry the lampshade from the side with a screwdriver and pull it towards you.
3. Disconnect the power connector (press the latch and pull down).
4. Install the new lamp in the reverse order.

After replacement, check the operation of the light: it should light up when the lid is opened and go out when closed. If the light does not turn on, check connection polarity — in some cases the connector may be connected incorrectly.

7. LED lamps instead of standard ones: pros and cons

Many owners Octavia A5 replace standard lamps C5W to LED analogues. This provides several advantages:

• ✅ Brightness — LED light is 2–3 times brighter, illuminating the trunk better.
• ✅ Durability — last 5–10 years (versus 1–2 years for incandescent lamps).
• ✅ Energy consumption — less load on the on-board network.

However, there are also disadvantages:

• ❌ Price — high-quality LED lamps cost from 500 rubles apiece.
• ❌ Polarity — if you confuse “+” and “–”, the lamp will not light up (unlike incandescent lamps).
• ❌ Flicker — cheap LEDs can flicker due to low quality drivers.

Recommended LED lamp models for Octavia A5:

Model	Type	Color temperature	Price (for 1 piece)
Osram LEDriving C5W	CAN-Bus	6000K (white)	~600 ₽
Philips X-tremeUltinon	CAN-Bus	6500K (cool white)	~800 ₽
Narva Range Power LED	Without CAN-Bus	5000K (warm white)	~400 ₽

When installing LED lamps, pay attention to CAN-Bus compatibility. If the comfort block is in your Octavia A5 gives an error when using LEDs, choose models with a built-in resistor (for example, Osram LEDriving).

Frequently asked questions about repairing the light in the trunk of the Octavia A5

🔧 Why does the trunk light stay on constantly even when the trunk lid is closed?

This is a sign of a problem cover position sensor (button stuck) or comfort block (false operation of the relay). Check the sensor with a multimeter: if the resistance is not infinity when the cover is closed, replace it. Also inspect the sensor connector for oxidation.

🔧 Is it possible to put a higher power lamp, for example C10W, in the trunk?

Not recommended. The wiring and fuse F36 (10 A) are rated for loads up to 5 W. Lamp C10W (10 W) may cause the socket to overheat or the fuse to blow. If you need bright light, it is better to install an LED analogue with a power of up to 5 W.

🔧 The light in the trunk is flickering or dimly lit - what is the reason?

Dim or flickering light is usually associated with:

• Poor contact in lamp socket (oxidation or weakening of springs).
• Low voltage in the on-board network (check the battery and generator).
• Low-quality LED lamp (cheap LEDs flicker due to a bad driver).

Start by cleaning the socket contacts and checking the voltage with a multimeter.

🔧 Where to buy an original light for the trunk of the Octavia A5?

Original lampshades can be ordered from official dealers ŠKODA or in online spare parts stores:

• Exist.ru (article 1K0 947 415).
• Autodoc.ru (analogues from Hella or Bosch).
• Groups on social networks for spare parts VW/ŠKODA.

The cost of the original is about 1,500 rubles, analogues - from 600 rubles.

🔧 Is it possible to turn off the trunk light completely?

Yes, but this will require intervention in the wiring. The easiest way:

1. Remove the trunk light.
2. Disconnect the power connector.
3. Insulate the contacts (for example, with heat shrink).

However, remember: turning off the lights deprives you of convenience when loading things in the dark. An alternative is to install a switch in a wire break (for example, a button on the trunk panel).

If after all checks the light in the trunk ŠKODA Octavia A5 did not work, the problem may lie in body control module (BCM) or ground fault. In this case, you cannot do without diagnostics with a scanner - contact an auto electrician with experience working with the platform PQ35 (on which it is built Octavia A5).