looking for s4 wiring diagrams

Richard van der Hoff quattro at rvanderhoff.org.uk
Sun Aug 5 19:56:22 EDT 2007

Mark R wrote:
> European cars have manual (electric) adjusters.  I don't have diagrams or
> part numbers, though.

This one (UK-spec 1999 B5 S4) doesn't...

Without actually going out in the cold and checking, I'd say that by far 
the most likely thing for the control signal to be doing is a simple 
voltage range, where (say) 0V would be maximum downward adjustment and 
12V would be maximum upward. Of course, these may be reversed, and it 
may be that the whole range isn't used. So you could easily replicate 
this with a variable resistor.

One word of warning though - I'm pretty sure that, in the UK at least, 
halogen headlights *must* adjust themselves automatically - you might 
want to check the deal in your jurisdiction.



> Good luck!  Sounds like a DIY guide in the works!
> Mark Rosenkrantz
> On 8/3/07, thejimrose <thejimrose at gmail.com> wrote:
>>well mark r has come thru for me in minutes. thanks mark!!
>>thanks to anyone else that was GOING to help but isn't as quick on the
>>'ol pdf-er-izer.
>>so it looks like the headlight leveling system consists of F+R level
>>sensors, a controller doohickey, and the adjusters servo's, which  use
>>a power, ground and some kid of reference. i guess i need to find a
>>car to play with to see what that reference signal looks like? then
>>figure out how to replicate it?
>>if there are any bored EE's out there who might have some input on how
>>to replicate what would be coming out of the control doohickey i'd
>>love some input. i'm crap with electrics and wouldn't even know if
>>what i'm thinking is feasible / possible. what i'd like to do is add
>>some kind of switch / controller to manually adjust the adjusters
>>[well, electrically/manually, not like, actually manually].
>>thanks all.
>>ps ECS sells the adjusters for 35$ each 'for vw's only' but the part #
>>matches the b5 audi s4 part #. dealer gets $75.
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