RE: Radio swap wiring.

["Buchholz, Steven" <Steven.Buchholz@kla-tencor.com>]

... actually it is more likely to be the dimmer for the faceplate
illumination based on the color you state.  

Most stereos I've installed (which in the majority of the cases have been
Sony) have at least one auxiliary output for controlling the antenna.  The
deck I recently installed in the 4kSQ (Sony) has two controlled output
signals, one for the antenna and the other for an external power amp.  I
actually used the one for the external amp to drive the antenna control just
for the reason you gave ... by using the antenna control line and if the
stereo was left on playing a tape the chime wouldn't ring when the door was
opened.  Now the antenna goes up when the tape is on as well, but I'll bet
that's exactly the way the Audi deck worked ... check the Bentley to find
the color of the wire that is connected to the antenna/chime ... perhaps it
is the one you listed ...

HTH!
Steve Buchholz
San Jose, CA (USA)

BTW, you can use the switch in the ignition lock that makes the chime ring
to provide the switched power to the deck (I actually use this contact to
drive a relay to switch power to the deck).  This makes it so that all you
need to enable the deck is any key installed in the ignition.  With this
technique you can leave the deck on all the time, you don't have to figure
out how to disable the faceplate illumination, and the door chime will still
work if you attempt to leave the car with the key in place ...

> ----------
> I installed a Sony deck in place of the OEM radio in 
> an '84 5KS.  There was a "spare" wire left over on
> the original connector.(light blue/whitish)  I'm
> assuming this wire receives some sort of signal from
> the OEM radio when the radio is on to trigger the 
> "you left your radio on" beep.  Is there a way to 
> hook up an aftermarket radio to perform the beep
> function when left on?  I don't want to wire the
> radio through the ignition switch, I've owned Audi's
> too long to get used to that again.
>