I'm trying to install subwoofer in to my 2018 Octavia without canton. I just couldn't find the correct speaker cables to connect. Someone said that red/black and brown/block would be the correct ones for the left rear door but there wasn't wires that color going to that door. The bass speaker had red/white and brown/white but those colors didn't come out of the door. 

 

Should I try to get the signal behind the radio head unit? I found some wiring diagrams for Skoda Octavia 3 but I believe those were for Pre-FL. I believe I have MIB 2.5 Bolero. 

 

How do I found the correct wires?

 

 

Factory wiring diagram suggests the following:

 

It's also got the pin numbers which may help track them down

14 minutes ago, langers2k said:

Factory wiring diagram suggests the following:

 

It's also got the pin numbers which may help track them down

It says that red/white and brown/white are for the left rear speaker which is correct. However, I did not found those wires outside the rear door. The trim next to the driver's seat does not have those colors. I'm pretty sure though that speaker cables are there but they just have different color.

 

 

And by the way I have steering wheel on the left. I don't know if it makes a difference.

Please look at the diagram again.

 

For the left rear door, the cables are only red/white and brown/white inside the door. They change at the connector at the door pillar...

 

That suggests 1.5mm brown/black and 1.5mm red/black between the headunit and door pillar connector.

5 hours ago, langers2k said:

Please look at the diagram again.

 

For the left rear door, the cables are only red/white and brown/white inside the door. They change at the connector at the door pillar...

 

That suggests 1.5mm brown/black and 1.5mm red/black between the headunit and door pillar connector.

Okay, thanks!

 

Someone actually told that red/black and brown/black would be the correct ones. It seemed like that those wires were going to the boot but I need to double check that.