Peter Bell wrote:

>> Yup Wolfgang is correct, you do have a switched live, just reverse
>> the red/yellow had to do it on both my A4's
> Careful! This was certainly true on older cars, but the more recent
> Audis do, as Glenn suggests, only have a permanent live to the radio
> and use CAN bus signals for the power up/down commands. This change
> occurred, I believe, when the Concert II/Symphony II range of radios
> was introduced. Without referring to the workshop manuals, I
> wouldn't be certain as to what to expect on a 2001 B6 A4, but suspect
> that it will use CAN bus control.

There's no wire going into the ISO plug for the switched live feed, so
it definitely uses CAN-bus. It had the Concert II head unit (single CD
player) fitted when I got it. I've had to join the red and yellow wires
together and attach them to the permanent 12v feed on the ISO plug.

My previous car (a 1999 A3) had a Chorus radio-cassette with separate
6-disc CD changer, and did have the switched feed on the ISO plug, but
it was a little unreliable - I think this may have used CAN-bus. When I
fitted my Sony kit in there I had to modify the adaptor harness a little.

> On my car (a 2003 RS6), I found a row of relays behind the panel
> below the steering wheel, with threaded studs to which you can easily
> add additional connections. One of these has a switched output, the
> rest seem to be permanent live.

You have an RS6? You jammy git! I want to drive it!

A bit of prodding with a multimeter has revealed a 12v ignition switched
feed on fuseway 5, which is the one for the factory phone hands-free
kit. As I have a Bluetooth kit taking its power from the ISO connector
on the head unit I don't think drawing a tiny switching current off this
will be a problem. (The Bluetooth kit runs through a line-level
adaptor that switches the front speakers over to telephone when a call
comes in, with the head unit muting the rears and sub.)

I'm holding off doing this for the time being though, as my new head
unit (Sony MEX-1HD) requires that I rip all my CDs onto its internal
hard drive. So for the last few days I've been leaving the car on the
drive with the head unit powered up, going out every few minutes and
changing the CD over. What I'm considering doing now is taking both a
permanent and switched 12v feed to a toggle switch mounted behind the
fuse panel so I can have the option of running the audio without the key
in the ignition, but normally leave it on ignition switched mode. That
way the music starts and my Bluetooth kit connects automatically.

--
Glenn Richards Tel: (01453) 845735
Squirrel Solutions http://www.squirrelsolutions.co.uk/

IT consultancy, hardware and software support, broadband installation

 

Peter Bell wrote:

>> Yup Wolfgang is correct, you do have a switched live, just reverse
>> the red/yellow had to do it on both my A4's
> Careful! This was certainly true on older cars, but the more recent
> Audis do, as Glenn suggests, only have a permanent live to the radio
> and use CAN bus signals for the power up/down commands. This change
> occurred, I believe, when the Concert II/Symphony II range of radios
> was introduced. Without referring to the workshop manuals, I
> wouldn't be certain as to what to expect on a 2001 B6 A4, but suspect
> that it will use CAN bus control.

There's no wire going into the ISO plug for the switched live feed, so
it definitely uses CAN-bus. It had the Concert II head unit (single CD
player) fitted when I got it. I've had to join the red and yellow wires
together and attach them to the permanent 12v feed on the ISO plug.

My previous car (a 1999 A3) had a Chorus radio-cassette with separate
6-disc CD changer, and did have the switched feed on the ISO plug, but
it was a little unreliable - I think this may have used CAN-bus. When I
fitted my Sony kit in there I had to modify the adaptor harness a little.

> On my car (a 2003 RS6), I found a row of relays behind the panel
> below the steering wheel, with threaded studs to which you can easily
> add additional connections. One of these has a switched output, the
> rest seem to be permanent live.

You have an RS6? You jammy git! I want to drive it!

A bit of prodding with a multimeter has revealed a 12v ignition switched
feed on fuseway 5, which is the one for the factory phone hands-free
kit. As I have a Bluetooth kit taking its power from the ISO connector
on the head unit I don't think drawing a tiny switching current off this
will be a problem. (The Bluetooth kit runs through a line-level
adaptor that switches the front speakers over to telephone when a call
comes in, with the head unit muting the rears and sub.)

I'm holding off doing this for the time being though, as my new head
unit (Sony MEX-1HD) requires that I rip all my CDs onto its internal
hard drive. So for the last few days I've been leaving the car on the
drive with the head unit powered up, going out every few minutes and
changing the CD over. What I'm considering doing now is taking both a
permanent and switched 12v feed to a toggle switch mounted behind the
fuse panel so I can have the option of running the audio without the key
in the ignition, but normally leave it on ignition switched mode. That
way the music starts and my Bluetooth kit connects automatically.

--
Glenn Richards Tel: (01453) 845735
Squirrel Solutions http://www.squirrelsolutions.co.uk/

IT consultancy, hardware and software support, broadband installation

 

Peter Bell wrote:

>> Yup Wolfgang is correct, you do have a switched live, just reverse
>> the red/yellow had to do it on both my A4's
> Careful! This was certainly true on older cars, but the more recent
> Audis do, as Glenn suggests, only have a permanent live to the radio
> and use CAN bus signals for the power up/down commands. This change
> occurred, I believe, when the Concert II/Symphony II range of radios
> was introduced. Without referring to the workshop manuals, I
> wouldn't be certain as to what to expect on a 2001 B6 A4, but suspect
> that it will use CAN bus control.

There's no wire going into the ISO plug for the switched live feed, so
it definitely uses CAN-bus. It had the Concert II head unit (single CD
player) fitted when I got it. I've had to join the red and yellow wires
together and attach them to the permanent 12v feed on the ISO plug.

My previous car (a 1999 A3) had a Chorus radio-cassette with separate
6-disc CD changer, and did have the switched feed on the ISO plug, but
it was a little unreliable - I think this may have used CAN-bus. When I
fitted my Sony kit in there I had to modify the adaptor harness a little.

> On my car (a 2003 RS6), I found a row of relays behind the panel
> below the steering wheel, with threaded studs to which you can easily
> add additional connections. One of these has a switched output, the
> rest seem to be permanent live.

You have an RS6? You jammy git! I want to drive it!

A bit of prodding with a multimeter has revealed a 12v ignition switched
feed on fuseway 5, which is the one for the factory phone hands-free
kit. As I have a Bluetooth kit taking its power from the ISO connector
on the head unit I don't think drawing a tiny switching current off this
will be a problem. (The Bluetooth kit runs through a line-level
adaptor that switches the front speakers over to telephone when a call
comes in, with the head unit muting the rears and sub.)

I'm holding off doing this for the time being though, as my new head
unit (Sony MEX-1HD) requires that I rip all my CDs onto its internal
hard drive. So for the last few days I've been leaving the car on the
drive with the head unit powered up, going out every few minutes and
changing the CD over. What I'm considering doing now is taking both a
permanent and switched 12v feed to a toggle switch mounted behind the
fuse panel so I can have the option of running the audio without the key
in the ignition, but normally leave it on ignition switched mode. That
way the music starts and my Bluetooth kit connects automatically.

--
Glenn Richards Tel: (01453) 845735
Squirrel Solutions http://www.squirrelsolutions.co.uk/

IT consultancy, hardware and software support, broadband installation