4 resistors and 3 capacitors, looks like.  Has anyone ever run a frequency
response test on this thing?  Bet it rolls off at about 2 or 3 Hz, moderately
hard, but not too hard, not enough there.  2 caps are probably bypass, 2
resistors are probably for current limiting or bias, so 2R 1C active filter
circuit.  Maybe 3R 2C, but I doubt it.  I'm obviously guessing a bit here, but
it should be very easy to make a circuit that does the same thing and  better.
I'd love to do that.  Used to make rack mount bi-amp crossovers for pro use
among other things.  This should be much simpler.  And a ton cheaper than VW's
price, whatever it is.

tom

On 29 Jul 2003 at 18:07, G. Lee wrote:

> If you ever wanted to know what is inside the VW factory AFM harness I've
> posted some pictures on my web site.
> As everyone knows, this harness was sold by Volkswagen to address what we
> refer to as "Vanagon Syndrome".
> VW part number is 025 906 302.
> It is an active device consisting of an op-amp and some resistors.  The
> "Capacitor Fix" seems to work for some people, although it is passive in
> operation.
> See
> http://www.telusplanet.net/public/gary2a/rack/afmharness/afmharness.htm
>
> Gary Lee
> http://www.telusplanet.net/public/gary2a/rack/vanagonrack.htm
>

------
Tom Ring K0TAR, ex-WA2PHW  EN34hx
85 Westphalia GL Albert
96 Jetta GL The Intimidator
taring@taring.org

"It is better to go into a turn slow, and come out fast, than to go into a turn fast
and come out dead." Stirling Moss