[A4] Partial High Beam voltage?!

Tyson Varosyan tyson at up-times.com
Mon Aug 13 11:45:34 EDT 2007

Rich, I could not get my mind wrapped around what was going yesterday. I
have been playing with DC electrical stuff since before I could talk and I
could not make sense of what was happening. I figured on the switch also,
but the thing is, the high beam light did not do this before I cut into it.
I went through and re-ran the grounds also thinking that maybe the stock
grounds were bad and were back-flowing somehow, but that didn’t fix it. 

At the end of the day, I put everything back together the way it was and
behold, the high beam indicator and the beams themselves started working
properly! However, since the HID install, I have been having exactly what
you describe – flicker and non-start of bulbs, plus a click sound that I can
hear through my speaker, which turns off my music when I turn on the lights.
Power cycling the radio fixes the problem, but it’s annoying. 

I also noticed that all 3 times that I had lighting issues, it has been very
hot (when I traveled inland). I also figured on heat resistance and thus
decided to do relays

Anyway, I still cannot figure out what I did wrong – this is a simple relay
install – I have done it on all of my Audis (5)
 I found that my car indeed
has a low beam relay under the dash. I could not find a high beam relay.
Rich, when you did your relays, did you do the high beams as well? Maybe I
should only do my low? If so, did you use the grounds in the harness for
your lights, or did you run new grounds? And which light did you use as the
“sender” for the relay? (Driver or passenger?) 

BTW, this is on a 98 A4q 2.8

Tyson Varosyan
Technical Manager, Uptime Technical Solutions LLC.
tyson at up-times.com
206-715-TECH (8324)
From: Richard Andrews [mailto:richard.j.andrews at gmail.com] 
Sent: Monday, August 13, 2007 4:01 AM
To: tyson at up-times.com
Subject: Re: [A4] Partial High Beam voltage?!

sounds like a partially cooked switch, i relayed my hid's for that reason.
I was getting the flicker and non-start of my bulbs when it got hot outside.

On 8/12/07, Tyson Varosyan <tyson at up-times.com> wrote: 
Hi guys, I got a weird one!

When I got the car about 6 months ago, I installed new lenses and HID low 
beam setup. It was a direct plug and play setup and worked more or less OK.

The last few weeks I have been having problems though. My passenger side low
beam stopped working, then the other one cut out, I cleaned the fuses on the

HID setup and got my driver side working again. I figured that as every Audi
that I owned the load on the headlight switch was too much and decided to do
the classic relay mod. However, now things have gone from bad to worse and I

cant figure out WTF.

When I turn on my low beams, my high beams wire starts showing 8-9 volts
(how?). With the high beams on, it shows 13-14 as it should. With all lights
off it shows 0. With just low beams on, the high beam indicator on my dash 
is dimly lit whereas under high beams it is brightly lit (as normal).

The question is, how and why am I getting partial voltage on the high beam
wire? How is that even possible?

Tyson Varosyan
Technical Manager, Uptime Technical Solutions LLC. 
tyson at up-times.com
206-715-TECH (8324)

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Richard J. Andrews
richard.j.andrews at gmail.com 

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