Make the dinging start again

Ti Kan ti at
Fri Dec 13 12:37:07 EST 2002

Cade Carvell writes:
>   I have replaced my radio in my car, and it no longer dings when it is
> left on, and the car is off.  It still dings when the Headlights are
> still on.  How do I make it ding again when the Radio is on.

There is a white wire in the 4Kq radio wiring that goes to the
warning chime relay pin 9.

If your radio is the type where the power antenna lead is always up
when it's on (as opposed to those that only raises the antenna when
in FM/AM mode), then you can tie the power antenna trigger lead on the
radio to that white wire, and it will accomplish what you want.  In fact
the original Audi Rothenburg radio is wired this way.  If your radio
only raises the antenna when in FM/AM mode, then it won't trigger the
chime when you're playing CD or tape.

>   Also, Is there a way to make it ding if I install fog lights and
> leave them on when it is keyed off.

Yes, you can also tie the fog light power to the chime relay, but
if you connect multiple sources to that line you must use diodes.
E.g., (ascii art best illustrated with fixed-width font):

      radio antenna trigger ----->|-----+---- to chime relay pin 9
			       diode    |
   switched fog light power ----->|-----+

You can use the commonly-available 1N400x series diodes (e.g., 1N4001).
Do not use Zener diodes.  Note the polarity.

2003 A4 1.8T multitronic
2001 S4 biturbo 6-sp
1984 5000S turbo
1980 4000 2.0 5-sp
    ///  Ti Kan                Vorsprung durch Technik
   ///   AMB Laboratories, Sunnyvale, CA. USA
  ///    ti at

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