Autocheck follies

[Doug Johnson]

Thank Mike!

That's the indication I need to move forward with relaying each individual
filament.  I'm off to strip wires!

Again, thanks,

 ~ Doug


> -----Original Message-----
> From: quattro-admin at audifans.com [mailto:quattro-admin at audifans.com]On
> Behalf Of Mike Arman
> Sent: Saturday, September 20, 2003 8:42 AM
> To: quattro at audifans.com
> Subject: Autocheck follies
>
>
>
>
> The autocheck unit contains a pair of current sensors, and as long as both
> head or tail lights are drawing the same amount of current,
> autocheck is happy.
>
> If one bulb goes out, the autocheck detects the imbalance, and complains.
> It turns out to be pretty low-tech - a couple of (bimetallic?)
> flat plates,
> which appear to flex when the current is imbalanced.
>
> If you relay the headlights, you need to draw the same amount of
> current on
> each wire - it doesn't matter if the relay current is much
> smaller than the
> bulb current, just as long as the two match autocheck is happy.
>
> Same thing with tail lights - the problem with adding a trailer socket is
> that we tend to pull the US-style single-wire-works-both-brake-lights off
> ONE of the Audi brake light wires, and autocheck detects the
> imbalance. The
> other problem is that the Audi wires are very small, just barely adequate
> to light up the stock brake and tail lights, and when we add extra loads
> for the trailer lights, things tend to go poof, all the smoke comes out,
> and you've just toasted parts of your wiring harness.
>
>
> Best Regards,
>
> Mike Arman
>
>