disabling autocheck bulb-out indicator

Eric_R_Kissell at email.whirlpool.com Eric_R_Kissell at email.whirlpool.com
Tue Oct 3 21:16:23 EDT 2000

On Tue, 03 Oct 2000, Steve Barber <steveb at cme.nist.gov> wrote:

>I'll be doing the relay thing to the Audi and want to make 
>sure I disable the autocheck indicator at the same time.

I found three entries in my archive. 
The last one is the one I used successfully:

Date: Sun, 20 Feb 2000 21:06:50 -0800 (PST
From: Ti Kan <ti at amb.org
Subject: Re: headlight out warning light with blau harness
Check Scott Mockry's write up on thisSubject on his web site: 

Date: Mon, 21 Feb 2000 00:11:43 -050
From: Shaun Folkerts <fiatlancia at earthlink.net
Subject: Re: headlight out warning light with blau harness
Try: http://members.aol.com/c1j1miller/body.html#Disabling the 
Autocheck headlight monitor 

Date: Mon, 21 Feb 2000 22:42:53 -070
From: apowell at ezlink.co
Subject: Headlight Warning Defeat 
Here's the headlight warning defeat cookbook post...from my 
archives. Also available at: 
http://www.ezlink.com/~powells/AUDIFAQ.HTML Thanks to 
information supplied by the Hon. Igor Kessel, I came up with a 
low-tech way to defeat the headlight warning which is a nuisance 
when using a wiring harness to power european lights. Note that 
this information applies to a 1990 200. (Igor's car is the same 
model, one year different...) Igor clued me in on finding the 
unit which provides the warning. That information is as follows: 
> The unit in question is located in the auxillary relay panel, 
under > the dash. Middle row, second from the right, looks like 
a standard > Hella relay. It is not. It's is a logic controller, 
P/N 443 919 > 469B, built around a single chip. The chip listens 
to the current > that flows through two very low reference 
resistors, comprised out > of two 15mm wires no less than 1mm in 
dia, probably Ag (they are > silver colour and have a very low 
resistance). The circuit listens > to the impedances of the low 
beams filaments and throws a red flag > (6v on terminal "K", 
goes to a thin grey wire, that is connected to > the kompooter) 
if either of two conditions are met: > 1. At least one filament 
is blown (R=infinity) or > 2. R of one filament significantly 
differs from R of another one. Igor made an elegant fix by using 
a non-functional relay which fit the hole, and by hardwiring it 
internally, then plugging it in. Pretty, but I didn't have such 
a spare relay body.... I did it the easy way by pulling the 
logic controller and making two short (3") jumper cables of 
14-ga. wire, with a male spade bit (blue code) on each end. I 
then inserted the spade bits into the relay connections to 
jumper both headlight circuits. NOTE: You cannot defeat the 
warning just by pulling the logic controller and leaving it out 
of the circuit. If you do this, the low beams **do not** come on 
- only the "city lights". The high beams do work, however. 
Igor's directions tell you where to jumper: > For now I can 
suggest my non-destructive method. You want to shunt > those 
calibrated reference wires. You need to connect 56bR to 56bR1 > 
and connect 56bL to 56bL1. This is VERY easy to do, as the pins 
on the logic controller are labeled exactly as Igor says. Just 
pull the controller and CAREFULLY make a diagram of the contacts 
on the relay panel (which is a mirror image of the relay - so 
don't screw it up...) and you will know exactly which 
connections to jumper. Double-check this before inserting the 
jumpers - it's easy to screw up!! Hope this non-detructive 
method helps others turn off that #%&&*$ headlight warning.


Eric R. Kissell
1989 200q Avant, needs 1.8 bar upgrade
1986 5000cstq, 1.8 bar, k24, Fuchs at next tire change
1987 VW GTI 16v, 1984cc, Euro Intake Camshaft, Techtonics SS exhaust, etc.

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