Fogs on with parking lights...SOLVED!!!

FatAuto · 02-20-2006, 07:46 PM

So as for as I know I'm the first to get this to work and I share it freely with all of the AW community. I ask that you keep my work intact and provide a link to this post or send it to the Tech Archives. This mod was performed on a 2004 Audi S4 and may not work on your vehicle, but if you have a B6 and maybe a B7 I think your golden. That being said...Its simple.

Tools:

VAG-COM tool
Wire cutters
Wire strippers
Some way to make an electrical connection (solder, tape)

Fist VAG the car to RDW (Rest of world). This enables the ECU to let the fogs work with the parking lights but we still need the power. See Ross Tech for more directions. Side note, I also found that RDW sets the parking light markers that come on when the blinkers are engaged without the key to work for each side independently rather then all 4 at once like mine used to when set to USA.

Now remove the headlight switch, to do so push the selector IN then turn clockwise about 10 degrees then pull the entire unit out towards you. GO EASY, it will come. Once removed you will see an electrical connector attached to the back of the switch. Remove this connector by pressing the two tabs on each side of the connector in and pull the connector off.

The electrical connector is marked with numbers for each of the wires. Our goal is to cut wire #2 and jump it to wire #1 IMPORTANT: THE WIRE FROM THE CONNECTOR HAS TO BE JUMPED TO #1 NOT THE WIRE THAT COMES FROM THE WIRE HARNESS. See picture below for my kick ass diagram.

Here is an explanation of why we do this. Pin #2 feeds the internal switches of the headlight switch 12V to tell the ECU when to fire the front and rear fogs. On our US cars pin 2 is only powered with 12V when the headlights are on. So we steal 12V from the main 12V supply for the switch (pin #1) and feed it to pin #2 all the time. If you don't cut the wire to the ECU from pin #2 it back feeds 12V to the ECU and lights flicker and go crazy! So make sure its cut BEFORE you connect pin #2 to pin#1

THATS IT!!! I had my entire headlight switch apart so I jumpered my pins internally, but I still cut the #2 wire. See pic above. Send me E-mails with questions and comments or post here. Hope it works for everyone. Adam R.

Shooter McGavin · 02-20-2006, 07:49 PM

NYC_S · 02-20-2006, 07:58 PM

FatAuto · 02-20-2006, 08:01 PM

jpc-S4 · 02-20-2006, 08:14 PM

This is almost too easy... sounds like I'll be busy this Saturday.

Your "kick-ass diagram" reminds me of something that happened a number of years ago where I worked. A co-worker sketched out a similarly crude schematic on paper, and handed it to an older engineer who originally hailed from Russia. He said to the guy who sketched it, in his strong Russian accent, "What did you do? Draw it with your PRICK?" I nearly pissed my pants...

Anyhow...

-JPC

SCJ · 02-20-2006, 08:15 PM

FatAuto · 02-20-2006, 08:16 PM

FatAuto · 02-20-2006, 08:20 PM

808S4DRVR · 02-20-2006, 11:30 PM

mjb2333 · 02-20-2006, 11:38 PM

02-20-2006, 07:58 PM	#3
NYC_S Member Account #: 66954 Join Date: Dec 2003 Posts: 2,033	Thats great!! can you use the parking lights without the fogs with this mod? __________________ _____________________ 01.5 Audi Avant (Wife) 03.5 M3 Coupe (Mine)

02-20-2006, 08:01 PM	#4
FatAuto Junior Member Account #: 49079 Join Date: Jan 2003 Posts: 360	YES...switch works just like it should, pull it out fogs go on __________________ --'04 Imola S4-- 18" Sportec H&R Springs H-Sways Stratmosphere SS Milltek Full-back Hyperflow E-Codes

02-20-2006, 08:14 PM	#5
jpc-S4 AudiWorld Super User Account #: 73014 Join Date: Mar 2004 Posts: 12,064	Great job... This is almost too easy... sounds like I'll be busy this Saturday. Your "kick-ass diagram" reminds me of something that happened a number of years ago where I worked. A co-worker sketched out a similarly crude schematic on paper, and handed it to an older engineer who originally hailed from Russia. He said to the guy who sketched it, in his strong Russian accent, "What did you do? Draw it with your PRICK?" I nearly pissed my pants... Anyhow... -JPC __________________ 2004 S4 6MT Moro Blue/Ebony

02-20-2006, 08:15 PM	#6
SCJ New Member Account #: 1453 Join Date: Mar 2000 Posts: 296	Why???

02-20-2006, 08:16 PM	#7
FatAuto Junior Member Account #: 49079 Join Date: Jan 2003 Posts: 360	Becasue a lot of people think it looks cool, thats why __________________ --'04 Imola S4-- 18" Sportec H&R Springs H-Sways Stratmosphere SS Milltek Full-back Hyperflow E-Codes

02-20-2006, 07:46 PM	#1
FatAuto Junior Member Account #: 49079 Join Date: Jan 2003 Posts: 360	Fogs on with parking lights...SOLVED!!! So as for as I know I'm the first to get this to work and I share it freely with all of the AW community. I ask that you keep my work intact and provide a link to this post or send it to the Tech Archives. This mod was performed on a 2004 Audi S4 and may not work on your vehicle, but if you have a B6 and maybe a B7 I think your golden. That being said...Its simple. Tools: VAG-COM tool Wire cutters Wire strippers Some way to make an electrical connection (solder, tape) Fist VAG the car to RDW (Rest of world). This enables the ECU to let the fogs work with the parking lights but we still need the power. See Ross Tech for more directions. Side note, I also found that RDW sets the parking light markers that come on when the blinkers are engaged without the key to work for each side independently rather then all 4 at once like mine used to when set to USA. Now remove the headlight switch, to do so push the selector IN then turn clockwise about 10 degrees then pull the entire unit out towards you. GO EASY, it will come. Once removed you will see an electrical connector attached to the back of the switch. Remove this connector by pressing the two tabs on each side of the connector in and pull the connector off. The electrical connector is marked with numbers for each of the wires. Our goal is to cut wire #2 and jump it to wire #1 IMPORTANT: THE WIRE FROM THE CONNECTOR HAS TO BE JUMPED TO #1 NOT THE WIRE THAT COMES FROM THE WIRE HARNESS. See picture below for my kick ass diagram. Here is an explanation of why we do this. Pin #2 feeds the internal switches of the headlight switch 12V to tell the ECU when to fire the front and rear fogs. On our US cars pin 2 is only powered with 12V when the headlights are on. So we steal 12V from the main 12V supply for the switch (pin #1) and feed it to pin #2 all the time. If you don't cut the wire to the ECU from pin #2 it back feeds 12V to the ECU and lights flicker and go crazy! So make sure its cut BEFORE you connect pin #2 to pin#1 THATS IT!!! I had my entire headlight switch apart so I jumpered my pins internally, but I still cut the #2 wire. See pic above. Send me E-mails with questions and comments or post here. Hope it works for everyone. Adam R. __________________ --'04 Imola S4-- 18" Sportec H&R Springs H-Sways Stratmosphere SS Milltek Full-back Hyperflow E-Codes

02-20-2006, 07:49 PM	#2
Shooter McGavin Junior Member Account #: 94021 Join Date: Jul 2005 Posts: 1,329	great job __________________ GONE BUT NOT FORGOTTEN 04 S4 6MT Moro Blue "All that Premium jazz" Hyperflow V8*4 Milltek Non-Res Cat-back S-Line Aluminum Trim Hardwired V1 Osir Zero Red Brake Calipers Hoen Xenonmatch Fogs LLumar 30% Stealth Tint Attention: By reading this post, you agree that content herein can not be used against myself or any other A.W. member Milltek Non-Res Exhaust and Hyperflow Clip \| 2 \| More Clips

02-20-2006, 08:20 PM	#8
FatAuto Junior Member Account #: 49079 Join Date: Jan 2003 Posts: 360	its too easy now, but it took 3 hours and this to get there... __________________ --'04 Imola S4-- 18" Sportec H&R Springs H-Sways Stratmosphere SS Milltek Full-back Hyperflow E-Codes

02-20-2006, 11:30 PM	#9
808S4DRVR New Member Account #: 84769 Join Date: Dec 2004 Posts: 405	Awesome! Thanks!

02-20-2006, 11:38 PM	#10
mjb2333 Member Account #: 50376 Join Date: Jan 2003 Posts: 2,829	2nd __________________ 05 S4 Moro Blue/Silver AWE Non-Res/ Hyperflow S5 On Order

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