Adding Rear Speakers to OEM Headunit and enabling Fade

[DrewT]

Just google quadlock pinout and you will see
Theres a 8 pin block in the back of the unit that makes up part of the larger quadlock plug, you will already have 4 wires in there for the front speakers and your rears will fill the other four empty slots

Brilliant Thankyou going to have a go tomorrow

 

[marksmithuk]

I can't work out where to install my speakers after a conversion with kitchen and rock and roll bed

 

[Jonnyboy217]

Yes on the standard setup on vans & kombis, there are four speaker inputs on the back of the stereos - front left/right which are used & rear left/right which are empty
You need to install additional wires to new speaker location, remove stereo and fit new cables into the empty terminals on the existing quadlock connector on rear
Heres the connector before i added my rear speakers
View attachment 379
and heres one of the wires with pin connected on end ready to insert into plug assembly
View attachment 380

Its worth noting that after connecting additional speakers in they will work but to function properly the radio will need to be coded with VCDS (vagcom) to accept new speakers and this will activate the fader/balance menu in the radio to give you additional adjustments

@shylock i have VCDS if you would like speakers coded

Hi,

where do you buy the pin connectors from please? Also what’s the best cable routs from the back of the van to the head unit? Thanks

 

[SteveJones001]

Hi, I want to use allow four speakers and the have the fader active, I have been told I need to enable VCDS. Does the unit do this automatically, I think it might but will lose it when an amp is connected in place of speakers?

 

[BognorMotors]

Yes you can use VCDS to enable the fader on a T6. Not yet on a T6.1 though

 

[SteveJones001]

Thanks, does it need enabling, or just comes up when I connect a load? Sorry labour the point

 

[BognorMotors]

Enabling

 

[The Van Cave]

Thanks, does it need enabling, or just comes up when I connect a load? Sorry labour the point

VCDS is a software that runs on a PC, connected to your van via a cable into the diagnostic port on the dash. It isn't something that exists in the head unit itself.

You would need to connect the rear speakers to the head unit, then use the VCDS to enable the rear speakers.

 

[Pauly]

Rear speakers will work when connected you just wont have the fader option in the menu until enabled

 

[andys]

I think you’re at cross purposes here, VCDS isn’t a mode on your head unit, it’s software running on a PC with a proprietary cable connected to your OBD2 port. You then use this software to activate things like the rear speaker fader enable.

 

[SteveJones001]

VCDS is a software that runs on a PC, connected to your van via a cable into the diagnostic port on the dash. It isn't something that exists in the head unit itself.

You would need to connect the rear speakers to the head unit, then use the VCDS to enable the rear speakers.

Thank you

 

[Edmeista]

Yes on the standard setup on vans & kombis, there are four speaker inputs on the back of the stereos - front left/right which are used & rear left/right which are empty
You need to install additional wires to new speaker location, remove stereo and fit new cables into the empty terminals on the existing quadlock connector on rear
Heres the connector before i added my rear speakers
View attachment 379
and heres one of the wires with pin connected on end ready to insert into plug assembly
View attachment 380

Its worth noting that after connecting additional speakers in they will work but to function properly the radio will need to be coded with VCDS (vagcom) to accept new speakers and this will activate the fader/balance menu in the radio to give you additional adjustments

@shylock i have VCDS if you would like speakers coded

Hi Pauly

Seen this thread which is an awesome guide. My mate has vagcom and I'm about to add rear speakers. Can you tell under which section the feature to enable the fader/balance is please? Many thanks. Ed

 

[Deaky]

Module 5F byte 4. Change it from 2 channels/4 speakers to 4 channels/ 6 speakers.

 

[Edmeista]

Module 5F byte 4. Change it from 2 channels/4 speakers to 4 channels/ 6 speakers.

Awesome thanks. Is there any way I can fit an amp to the existing loom, I was thinking of adding a sub. Cheers

 

[Deaky]

Awesome thanks. Is there any way I can fit an amp to the existing loom, I was thinking of adding a sub. Cheers

Yes, it needs to be line level input, you can either splice into the existing speaker wires or purchase a pass through quadlock loom

 

[Edmeista]

Sweet so I can just spur off one of the rears to a high input amp? Thanks for the advice

 

[Deaky]

Sweet so I can just spur off one of the rears to a high input amp? Thanks for the advice

Yes, but the head unit won’t recognise the amp as a load, so it won’t enable the fader option.

 

[Edmeista]

Nice one. Thanks for the help

 

[JamieJGObass]

Hello guys,

I've just had some rear speaker from SCA installed in the rear of my T6 panel van which has been converted to a Kombi.
I'd already had and fitted a 5F 'Discover' Nav unit which was working fine.

The head unit was connected up to add the new rears as per connectors that came with the speakers and now only getting audio via one speaker in the rear - they've been swapped about so both drivers are working, but only one at a time.
When checking on the multimeter, it's showing +5v coming down the cable of the side which no audio is coming out.

Help please!

 

[Deaky]

Have you connected the speakers directly to the quadlock connector or have you used a pass through patch lead?