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Discussion Starter · #1 ·
I have installed the European OEM LED tail lights in my GTI. Lacking specific instructions and a DIY, I had to figure out how to do it using information on the 'Tex, my Bentley manual, and some help from Rich at Oempl.us.
Since a specific DIY does not yet exist, I thought I would share the information I used to install my taillights. The installation can be divided into three parts. The first is removal and installation of the new lights. The second is wiring and the third is coding using VAG-Com. Please note that I removed the rear fog light lens and did not enable the rear fog function.
Removal of the Old and Installation of the New
There is no need to reinvent the wheel. My lights came with instructions from Oempl.us that were more than adequate.
Wiring
The European wiring harness has 4 wires (Turn, Brake, Parking, Return/Common) running from the central electronics control module (J519) to each of the taillights. The US wiring harness only has 3 wires (Turn, Brake, Return/Common). To get the LED's to function properly, you need to provide a signal to the 4th pin. I know of two ways to do this. One results in a "bulb out" message on the MFD and the other (adding a 4th wire) does not. I'll cover both below:
The pin configurations at the taillights are:
Stock Left (Driver's side)
1. Not used
2. Black/white (turn signal)
3. Black/red (brake light)
4. Brown (common/return)
Stock Right (Passenger side)
1. Brown (common/return)
2. Black/purple (brake light)
3. Black/green (turn signal)
4. Not used
The wires need to be moved in the connector using the method described in the Jetta LED DIY instructions (Thanks to those who wrote the Jetta DIY http://****************.com/smile/emthup.gif )
LED Left (Driver's side)
1. Black/white (turn signal)
2. Black/red (brake light)
3. New Wire (Parking light)
4. Brown (common/return)
LED Right (Passenger side)
1. Brown (common/return)
2. New Wire (Parking light)
3. Black/purple (brake light)
4. Black/green (turn signal)
The new wire should be VW part 000 979 141 (I have been told that wire 000 979 151 works better, but I have not verified this). This VW wire has a connector on each end. This allows you to cut the wire in half to have a pigtail for each side.
The two new wires need a signal to activate the parking lights. The first choice is to splice wires 2 and 3 together as shown in the R32 taillight DIY. The lights will work just fine if you do this (after VAG-Com changes), but you will have an error message in the MFD that you won't be able to clear.
The second method is to run two new wires, one to each side, from the central electronics controller (J519) to the taillights. To do this, you need access to the central electronics controller. I found the Jetta rear foglight DIY to have better instructions than my Bentley manual. To connect the wires to the central electronics controller, you will need VW part 000 979 025. This wire works just like the one for the taillights. Cut this wire in half and install the wire for the left (Driver's) side to connector C, terminal 10. Install the wire for the right (passenger's) side to connector B, terminal 9. (Thanks to oripaamoni for this information http://****************.com/smile/emthup.gif )
You must then run wires from these pigtails to the pigtails in the back. One suggestion for routing the wires is to read the GTI sub DIY for routing ideas. I used the instructions in my Bentley manual for removing the trim, as I thought they were a little better.
VAG-Com Instructions
Once you have connected wires to all four pins and reinstalled the connectors into the taillight housing you are ready to recode your central electronics module. This coding appears all over the Jetta LED threads, so I don't know who to credit for this information. Using a VAG-Com, you need to make the following changes to the Central Electronics Module (09).
Change Bytes 9 through 13 from 14 00 00 00 14 to 0A 00 00 0F 00
Change Byte 18 by unchecking the cold diagnostic bits 1, 3 and 5
Change Byte 19 by unchecking the cold diagnostics bits 2 and 3
Hopefully this helps, but as always YMMV.


Modified by jimb at 12:58 PM 1-9-2009
 

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Discussion Starter · #3 ·
Re: OEM LED Installation (rickerbr)

I ran both wires down the driver's side of the car. I did this because I thought it would be easier than going through the dash.
There are already wires running down the driver's side of the car, so I just followed the existing wire bundle. In addition to the door sills and back seat cushion, I had to remove the two pieces of trim along the sides of the rear seat. This allowed me to take the exact same path as the factory wiring for the driver's side taillight. For the passenger's side, I routed the wire from the left to the right side in the area under and behind the rear seat cushion. I then routed my wire along the same path as the factory wiring to the passenger side taillight.
 

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Discussion Starter · #9 ·
Re: (barnstee)

Quote, originally posted by barnstee »
Forgive my ignorance, jimb, as I'm in Europe and not familiar with the internals of the US light cluster.
So what I'd like to understand is which signal is used in the US light cluster (i.e. the circuit board the light bulbs are housed in) for normal running lights, i.e. when the light switched is tuned on. Maybe someone can disassemble the US light cluster and take a picture? Is the brake light signal also used for normal running lights, just at a lower voltage, so the "red circle" gets brighter when the brakes are applied? I ask because I'd like to find out if there is a way to get the LED lights working in a US legal way WITHOUT getting the fault code for "bulb out" on the MFD and WITHOUT having to run the extra two wires. Maybe a resistor could be wired in parallel to reduce the resistance (the cause for the "bulb out" light coming on?).

I'm not sure if I'm going to be able to answer the question your asking, but here goes. The US spec. outer taillamp assembly only has two bulbs, where as the European spec. assembly has three bulbs. The clear center circle in the US assembly is just there for show and there is no bulb holder behind it even if you wanted to make it active. The remaining two bulbs each light up half of the large red outer circle. The outer half is used as a parking light, turn signal and brake light. The inner half is a parking light and brake light. The computer sends a low voltage signal to both bulbs as parking lights and higher voltage signals when the bulbs are used as brake lights or turn signal lights.
If you are in Dublin, Ireland; your car should already have the proper wiring. You still need to disable the cold diagnostics with a VAG-Com, but otherwise the lights should be plug and play on a European spec GTI. If you are in Ireland, the red fog lamp will be on the left side instead of the right side.
If you are in Dublin, Ohio; then yes you will need to run a new wire to each LED. I've spent hours trying, but was not able to come up with a VAG-Com change that fixes the problem. I do know that the bulb-out warning is not caused by the cold diagnostics. You get the error as soon as you turn on your headlights. The computer expects the rear parking lights to come on, but since they are not connected to the CEM the computer generates an error.
 

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Discussion Starter · #12 ·
Re: (Buran)

Quote, originally posted by Buran »
Is the error message mentioned above actually what the poster above me suggests, the bulb-out warning? I imagine that it probably is due to LEDs not having the resistance that tungsten filaments do. If this is so, I recall that when a friend modified my car to UK region and changed a few other things for me, there was more than one bulb-out diagnostic check that could be disabled. Does anyone recall if it is possible to just disable those for taillights, front marker lights, and turn signals separately? If so, I plan to just disable the checks for the places I'll install LEDs. LEDs, after all, very rarely fail. I'd rather not run the additional wires.

It is a bulb out warning that comes on only after you turn on the headlights. I have tried, but so far have not found a way to disable it with a VAG-Com. You are correct that you can disable individual cold diagnostic functions for each light, but there is not a way to disable the active diagnostic function.
You should be able to just plug the LED's into your GTI without making any wiring changes and they should work. I suppose if you disable all of the cold diagnostic functions, you won't get any errors as well. The only drawback to this method is that your turn signals won't blink amber when they are activated. Since I wanted my lights to blink amber, I never tried this.
 

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Discussion Starter · #13 ·
Re: (Buran)

Quote, originally posted by Buran »

Hey Jim, GTG at Schneithorst's tonight, I'm going to show the new car to the club.
In Ireland, the rear fog is on the RIGHT side as England/Ireland/Scotland are RHD countries.

I was going to be at the GTG tonight as well. In my haste to post, I didn't give a decent explanation. For whatever reason, the OEM style LED's are only available with the fog on the left side. The supplier has not (yet?) released a version for the U.K. with the fog on the right.
 

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Discussion Starter · #16 ·
Re: OEM LED Installation (gti luver)

With the wiring modification, both the inner and outer circles light up as parking and brake lights (brighter of course). When I use my turn signals, the outer ring blinks amber. If the parking lights or brake lights are on, the LED's in the outer circle change from red to amber to red to amber.... Which I think is kind of cool, but then again it does not take much to impress me.
 

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Discussion Starter · #21 ·
Re: OEM LED Installation (gti luver)

Quote, originally posted by gti luver »
what I did is just kept the common in place and moved the other 2 pins one slot down, if I remember right on the left it was 2 to 3 and 3 to 4, and on the right it was 3 to 2 and 2 to 1, plus I used the coding that I found on the vortex to disable cold diagnostics and activate rear fog and the amber turn signal, if you need more details IM me

This is what I started with, but since I wanted both rings to light up as parking and brake lights I added a wire. Even when I had my car wired like yours, I still had a bulb-out error. I am curious as to what your long coding for bytes 9 throuh 13 is. Thanks.
 

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Discussion Starter · #23 ·
Re: (barnstee)

Quote, originally posted by barnstee »

Thanks very much jimb for your explanation! I understand it now. I've just never seen the US spec real light from the inside.

I'm actually in Dublin, Ireland.


I originally assumed you were in Ireland, but had second thoughts so I included that blurb about Dublin, OH. If I had read your profile, the '07 R32 would have given your location away. Just out of curiosity, what are you trying to make your taillights do?
 

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Discussion Starter · #45 ·
Re: (r32-1163)

Quote, originally posted by r32-1163 »
Does anyone know if it's possible to do the install without having to run any additional wires? It won't blink amber without the wires right? but will the blinkers still work?
Does anyone know of a really good DIY? The ones I've seen are "ok" but doesn't explain everything to a degree that I would be 100% confident doing the install. I really don't want to F*ck up on my Brand New R32!
I saw someone selling ECS Tuning Harnesses for MKV Jetta Led installs, I was thinking to buy these and switch the pinouts to match what's required for the Golf/GTI/R32 LEDs. This way if I need to change back the tails, it's much more of a plug and play job.
I got a VAG-COM to USB cable off ebay for cheap. Still worried about changing stuff on my New Car tho.
I'm a Honda guy, only used to work on Acuras/Hondas, this is the first time I bought a European car.
Picked up the oem Ipod kit, monster mats and trunk mat from 1stvwparts.com gonna put those in this weekend.

Some people have to add wires, some do not. There does not seem to be any rhyme or reason for this. I would post a question in the R32 forum and see if anybody has installed LED tails and ask if they had to add wires.
Regardless, you are still going to have to move wires in the tail light connectors and do the VAG-Com changes. This really isn't that hard to do, but I understand that you are new to VW's.
What type of VAG-Com cable did you buy on EBay? Because the old VAG-Com cables will not work on your car.
If you want, I will install your taillights for you and make the appropriate VAG-Com changes; however, it will cost you two round trip tickets from St. Louis to Honolulu.
 

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Discussion Starter · #56 ·
Re: (nugj)

Quote, originally posted by nugj »
Guys I never saw any follow ups indicating whether or not these harnesses form ECS Tuning actually could be used to make the pin conversions to install the OEM (or other) LED Taillights on the 08 R32 or not. Did they work? Did you still have to run extra wires back to the LED lights from the Euro switch in order to get them to work properly or did using these harnesses allow you to make the pin conversions without adding an extra wire on each side. I could not figure out from the postings if these harnesses were intended to make the pin conversions AND eliminate the need to run a fourth wire in order to prevent an error message that could not be cleared or if these were used WITH a fourth wire to make the pin conversions AND keep from instigating an error message that could not be cleared.

Sorry for the rambling questions, Obviously these rear taillight conversions are more complicated than they look. Even asking a question about them gets complicated.
Anyway I hate the idea of hacking into a harness and will do just about anything to make this job easier requiring less invasiveness with regard to the existing wiring.
Any additional info from folks that have done this job and used these harnesses on the R32 would be much appreciated.

You are correct in that installing European spec. taillights on a U.S. spec. car is not a straight forward proposition. You need to be able to perform electrical work, mechanical work, and you need to have access to a VAG-Com. These requirements make the installation difficult for almost everyone.
First, I have no idea about whether the ECS harnesses work or not on an R32 or GTI. I do know that they work on the Jetta because it already has 4 wires running to each light. Having a harness that changes pin configuration is a no brainer and allows somebody to install European LED's without having to move wires.
From what I've read on the R32 forum, the taillights are wired exactly like those on the GTI. This means that you have three wires running to each taillight. This is fine for the U.S. spec. lights, but you still need to get a signal to three pins (4th is common) on the European spec. LED lights. I did try to do this by splitting one of the wires and using it on pins 2 and 3, but I could not get rid of the bulb out error.
So even if a pre-fabricated harness splits the signal, you won't be able to get rid of the bulb out error. It would be a better solution for a prefabricated harness to include a pigtail to be connected to the 4th wire you have to run to each light. Even if that was done, one has to wonder if that would actually make the installation any easier.
I would hardly describe adding a 4th wire as "hacking". You use new VW pins that are designed to be inserted into the connectors and then run a wire from the front to the back. I realize this is over-simplifying the work, but it is also an exaggeration to say you are hacking the wiring harness. In 5 years, I will let all of you know how the LED's on my GTI are doing. I'm willing to bet that my wiring modifications will be fine, but that there will be plenty of other gremlins driving me crazy.
 

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Discussion Starter · #60 ·
Re: OEM LED Installation (MotherTucker)

Quote, originally posted by MotherTucker »

I have a US spec '07 GTI, and installed the Hella LEDs from OEMPl.us. I rewired the connectors on the lamps as specified, and used a vag-com to set the bytes properly, and got it all working.... with the exception of the side light bulb out errors. I added the 2 wires as instructed at the beginning of this thread, and it did not fix it. I was hopefull for a while that it would fix it, but it didn't.
Just wanted to chime in with this. I'll keep watching here, hope to get a fix for it at some point.

By adding wires, did you run a wire from the CEM to each tail light or did you splice a wire to send the same signal to pins 2 and 3? Next, what is your long coding, and did you disable the cold bulb diagnostics? Let me know, and I'll try to help you.
 

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Discussion Starter · #61 ·
Re: OEM LED Installation (Pelican18TQA4)

Quote, originally posted by Pelican18TQA4 »

Please clarify this. If I don't run any additional wires and leave the ground wire in place but move the other two wires, I will get the center lights as parking/brake, the outer lights as parking/amber turnsignal? The extra wires are only needed if I want to have both the inner and outer circles light up for brake? Thanks.

If you do not send a signal to the three pins and leave the ground in place, the center will function as the brake and parking light. The outer ring will serve only as a turn signal. This is assuming that you made the required VAG-Com changes. You will most likely have multiple bulb out error messages in your MFD, but those can be ignored.
I do need to reword my original post. When I spliced the wires to send the same signal to pins 2 and 3, the inner and outer circles functioned as parking and brake lights. Once I added the 4th wire from the CEM to each tail light, the center ring functions as a parking light and brake light. The outer ring functions as a parking light and a turn signal, but not a brake light.
 

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Discussion Starter · #65 ·
Re: OEM LED Installation (Pelican18TQA4)

Quote, originally posted by Pelican18TQA4 »
Got the LED tails yesterday but the wires won't be here for a few days. Is it possible to install these without doing any rewiring at the moment? I know that they won't function completely normal and I will get bulb out errors, but will they at least function (i.e. parking/brake/turn) if I install without doing any rewiring for the time being?

I too was impatient and installed my tail lights before I received the wires. If you move the wires in the tail light connectors and make the VAG-Com changes, all of your lights will work except that the outer ring will not light up red when the parking lights or head lights are turned on. You will also have errors, but once you run the wires from the CEM to each of the tail lights, the errors will disappear.


Modified by jimb at 8:05 PM 11-14-2007
 

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Discussion Starter · #73 ·
Re: OEM LED Installation (MotherTucker)

Quote, originally posted by MotherTucker »

I ran 2 new wires from the CEM as instructed at the beginning of this thread. Here's my setup:
Driver's side lamp wiring:
Brn
New wire
Blk/Red
Blk/Wht
Passenger's side lamp wiring:
Brn
New wire
Purple
Blk/Grn
Cent. Elec. Module 9 long encoding:
07 8F 8F 27 00 04 15 00 00 0A 00 00 0F 00 00 00 00 08 55 03 5C 00 00
I do have the euro rear fog light option configured and working. The lights work 100% properly, but are throwing the Rear Side Light Bulb Out errors, which comes on when I turn on the parking lights after clearing the error codes. Yes, I attempted to disable all cold diagnostics that have anything to do with the rear lights.
Thank mucho for your help!
mt

The side bulb-out errors I had were related to the parking lights (red lights in outer ring). When you turn on your headlights, do the outer rings light up red?
If not, you may have run the wires to the wrong pins on the CEM. The pins are not individually labeled, but rather there is a 7 and 12 on the corners above the top row. You then have to count over to pin 10 on connector C and pin 9 on connector B. You may also have a loose connection between the CEM and the tail lights.
Other than that, your coding looks fine.
 

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Discussion Starter · #74 ·
Re: OEM LED Installation (Pelican18TQA4)

Quote, originally posted by Pelican18TQA4 »
Installed the OEM LED tails today and I'm lovin' them! jimb's DIY is spot on and helped tremendously. Total time was about 1 hour including rewiring and VAG-COM work. I still have to install the additional two wires; UPS should deliver them tomorrow.

You are very welcome. I wish I could take decent close-up photos with my digital camera, because that would make my instructions easier to understand.
 

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Discussion Starter · #77 ·
Re: (Buran)

Quote, originally posted by Buran »
If we manage to meet up again we could get some good pictures- I've got a tripod, a shutter release cable, and a Micro-nikkor "macro" lens.
I wonder if that 08 update is available in the USA...

I wouldn't mind setting something up for a Saturday. I also had another really simple idea, we could take one of your rear lights and just plug it into my connector and see if I get a bulb out error. If not, we'll know that adding the wire clears the error for the Hella lights as well. If I get an error, it's time to start over...
 

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Discussion Starter · #84 ·
Re: OEM LED Installation (MotherTucker)

Quote, originally posted by MotherTucker »
Buran -
My lights are working fine. I have only the rear side light bulb out errors happening. Please let us know if the 08 software upgrade fixes it for you.

I have had the headlight recall performed on my car and I'm not sure if they updated my software. I checked and do know that my long coding was not changed. So if the software was updated, it was transparent to me.
As far as coding changes, this is what I did to Buran's car (Hella LED's) and mine (OEM LED's):
Byte 09 - This controls the brightness of the brake lights when they are used as parking lights. I set mine to 10% from the 20% factory setting. I have set mine at 0% for a test and only the outer rings light up (no errors!), but have since returned it to 10%.
Byte 12 - This activates the parking lights after the 4th wire has been installed from the CEM to the tail lights. I have mine set at 20%. I have tried other settings and know that a 0% setting with the 4th wires installed results in bulb out errors on my car.
Byte 13 - This is set from the factory at 20% on U.S. spec. cars to allow for the turn signals to function as parking lights. If you do not set this to 0%, the outer rings of the LED's will light up amber when you turn the headlights on.
I do wonder if leaving this Byte at 20% would clear the error w/o adding the wires to your LED's. Of course your amber lights would be on whenever your headlights are turned on, and I doubt you want that. It could be set to 1%, but again your amber lights would be on all of the time (although at a very dim setting).
Byte 18 - Bits 1, 3, 5, and 7 are turned off so that the computer would not perform cold diagnostic testing on the LED's.
Byte 19 - Bits 2 and 3 are turned off so that the computer would not perform cold diagnostic testing on the LED's.
I know we did not install the 4th wires on Buran's car, and I think that adding them will clear the error codes. We could see if changing Byte 12 and Byte 13 helps, but I don't think we will be able to clear the errors w/o the wires. Then again, maybe VW has a software fix.


Modified by jimb at 11:42 PM 11-19-2007
 

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Discussion Starter · #113 ·
Re: OEM LED Installation (ktreg)

Quote, originally posted by ktreg »
i got around to this diy last night; not quite done... removing the wires from the tail harness was ridiculously hard for me (yes removed the pink lock) and i was still unable to remove one wire from the right one, despite everybody's advise above. will have to do some cutting and splicing w/ 83caddy18v on that one... it's funny, it took minimal effort, almost blind luck, on the wires i was able to remove.
question: i obtained the wire part # 000 979 141 per jimb's instructions -- the connector felt loose in the tail harness; in fact, i could just pull it out w/o using the paper clip tool. it stays in once the pink lock is on but did you guys experience this? the general shape of the connector seems similar to the harness port, but i wouldn't put it past the dealership to order me the wrong part.
the front ecem connectors clicked in and stayed there like i'd expect.
i should have taken pics of the wiring process but all you would've seen was me sweating and putzing around w/ a hundred paper clips
re: front-back wiring, it is neat to see all the wires running from front to back along the door sills; great for the hands to take apart the plastic trim sections, too
. unlike jimb, i didn't mess w/ snaking the new wires through the side of the trunk from the back seat. i just went under the back seat and dug them down as far as they could go w/o getting in the way of any hinges or seatbelts. front left to right tail i went under the trim on the bottom of the hatch opening.
well there's my experience so far http://****************.com/smile/emthup.gif

Modified by ktreg at 3:13 PM 3-9-2008

First, thanks for PM'ing me. For some reason I was not being notified that there were new posts in this thread.
As far as the repair wires go, the one I used in the taillight connectors did fit loosely but was held in correctly by the purple clip. I was worried at first, but have not had any problems in 8 months of use. I may have received the wrong part too, but it does work.
 

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Discussion Starter · #137 ·
Re: inner fixture in Valeo / VW LED tail lamp set (r32-1163)

Quote, originally posted by r32-1163 »

bummer, though, what I would do is buy the left inner lap from someone over in England. Since they are RHD there, their left inner lamp should be clear http://****************.com/smile/emthup.gif
Only problem now is finding a hookup to do it.
I get wheezy thinking about cutting and re-welding the plastic, just to remove one red lens.

There is not yet a version of the OEM LED's for the Golf/GTI/R32 for England or any other country where they drive on the left side of the road. In those countries they take apart both lights and swap the red lens from the left side to the right side.
In all honesty, I was one of the first people to do this mod and it is not very difficult to remove the red lens. The only thing that I failed to do was take pictures. You don't need to weld plastic, because super glue works just fine. If you do use glue, be careful not to let it run down inside of the tail light.
 
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