[V6-12v] Euro headlights

Roger M. Woodbury rmwoodbury at downeast.net
Thu Nov 25 07:52:04 EST 2004

Yup. There are several "fixes" archived on the V8 list, including installing 
a jumper to bypass the circuit.  That will disable the Autocheck system for 
the headlights, which I don't mind, but still doesn't explain why I have no 
trouble with the V8 and do with the 100.  I am wonder if there is something 
that is different with the system in the later car than in the Type 44 cars?


----- Original Message ----- 
From: "The CyberPoet" <thecyberpoet at cyberpoet.net>
To: "Roger M. Woodbury" <rmwoodbury at downeast.net>
Cc: <v6-12v at audifans.com>
Sent: Thursday, November 25, 2004 7:24 AM
Subject: Re: [V6-12v] Euro headlights

> There are two issues with the headlights that come to mind.
> The first is the bulb out warning -- the system checks the resistance on 
> the circuit on each side and compares them; if they are more than a 
> certain amount off of each other, it assumes the bulb is out. Using 
> identical bulbs from the same manufacturer usually rectifies this.
> The second issue is a relay-related issue on the driving lights (i.e. - 
> fog lights) and switching from lowbeam to highbeam or visa-versa, where 
> the driving lights fail to turn on or off. I don't remember the exact fix, 
> but it had to do with adding a ground circuit somewhere in the system. I'd 
> check the V8/quattro list archeives to find it.
> Cheers
> =-= Marc Glasgow
> On Thursday, November 25, 2004, at 07:17  AM, Roger M. Woodbury wrote:
>> We have just had European headlights (H-4 bulbs) installed in our '94 100 
>> Avant.  The headlight low beams trigger the "headlamp out" signal on the 
>> Autocheck system.  I know that there have been posts about this on this 
>> and other lists, and wonder if anyone remembers what the "fix" is for 
>> this problem?
>> Interesting enough, high beams do not register on the Auto check system, 
>> and the ikon goes out when high beams are selected.  I have not checked 
>> with the mechanic yet concerning whether or not he relayed both high and 
>> low beams separately, as that might make a difference.
>> I have European headlights in my V8 and had them in my 200 Quattro Avant 
>> (1989), and the Autocheck system didn't go haywire with them, so it is 
>> something with this particular installation, or something unique to this 
>> later body style's Autocheck system.
>> Any ideas?
>> Roger
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