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Discussion Starter #1 (Edited)
I've completed the first steps of the project successfully. I'm just waiting on the tail lamp to arrive to finish up.

I have a 2018 SE built in 11/2017, after they stopped installing front fog lights on all S and SE models.

First check was to see if there was a front fog light trigger wire in my headlight switch harness (pin 5), and there was. That saved running the trigger wire from the switch to the BCM.




I then swapped out my stock NAR headlight switch to a euro one. The part I got off eBay DE is 5G0941431BD. It has stops for both front and rear fogs. To be clean, I should have gotten the one for rear fogs only (5G0941431BE - no front, rear fog stop only) but I got this one just in case I want to add front fogs at some point.




I followed the MK7 Golf (MQB) coding instructions for the BCM using VCDS:

Select: 09 - Cent. Elect
Select: Security Access -16
Enter the Access Code: 31347, then “Do it!”
Select: Adaptation - 10
Search: Außenlicht_uebergreifend-LDS_mit_Nebel_Schlusslicht
Select: New Value "Yes", then click “Do it!” (This tells the BCM that a light switch with rear fog function is installed)
Search:Leuchte28RFL LC11-Lichtfunktion A28
Select: New Value "Nebelschlusslicht wenn kein Anhaenger gesteckt", then click “Do it!” (This tells the BCM that the vehicle is to use a rear fog in that lamp position, formerly the reverse light)


The light on the dash came on (yay)




And here's how it looked at the rear (obviously not red - yet)



Everything has gone to plan so far. The last step is to install the inner-left tail lamp which has the rear fog light (lights red) instead of the reverse light (lights white). I got it off eBay DE and it should arrive in a week or so. The part number I bought is 5NA945093F.




Unknowns:

I may have to move a PIN on the lamp harness connector, depending on whether or not the new lamp uses the same A28 light position. Of course I'm hoping for plug and play - fingers crossed - though I could run into issues with the connector shape too.

I'm hoping the lamp color is the same as the others. VW has so many reds (red, dark red, cherry red) that it can be hard to tell until they're held up against the existing lamps.
 

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Discussion Starter #5 (Edited)
While I wait on the tail lamp to arrive, I started getting into the wiring and pin locations at the lamp.

EDITED to remove assumptions: The car-side connector has three wires going into the lamp, which are ground (#1 brown - customary) / standing/tail/running/parking (#2 blue-grey striped) / reverse (#4 green striped).

NAR car-side lamp harness:




What's interesting is the stock NAR lamp has four pins. From what I can tell from the pics of the euro one I bought, it has four pins (and wiring) too. Makes me wonder what they have going on (designed) in the lamp...

NAR lamp connector:

 

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.....What's interesting is the stock NAR lamp has four pins. From what I can tell from the pics of the euro one I bought, it has four pins (and wiring) too. Makes me wonder what they have going on (designed) in the lamp.......
They don't make a special connector body for every application. They chose to make a five slot body so it could be used for a lot of applications.
 

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lazy design by VW using a reverse light position as the rear fog lights, as the PQ35 has separate rear fogs, as well as the MK7 Golf/GTI/Sportwagen that retain both reverse lights
 

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lazy design by VW using a reverse light position as the rear fog lights, as the PQ35 has separate rear fogs, as well as the MK7 Golf/GTI/Sportwagen that retain both reverse lights
That is because these are the base model tail lights on European models. In Europe these tail lights also have halogen amber turn signals below the brake light (where the white rectangle lens is - not functional on NAR vehicles)

The higher trim models in Europe get full led cherry red tail lights that have led amber turn signals and led reverse lights placed directly below the turn signals on the outside tail lamps.


Sent from my SM-G965U using Tapatalk
 

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That is because these are the base model tail lights on European models. In Europe these tail lights also have halogen amber turn signals below the brake light (where the white rectangle lens is - not functional on NAR vehicles)

The higher trim models in Europe get full led cherry red tail lights that have led amber turn signals and led reverse lights placed directly below the turn signals on the outside tail lamps.


Sent from my SM-G965U using Tapatalk
It's still lazy design to use a reverse light as a rear fog light, especially with the available wasted space on the MQB Tiguan inner housing, that they could have designed in a rear fog below the reverse light.




On the MK7, all trims have separate rear fogs, retaining both reverse lights, whether it's incandescent or LED tails
 

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It's still lazy design to use a reverse light as a rear fog light, especially with the available wasted space on the MQB Tiguan inner housing, that they could have designed in a rear fog below the reverse light.




On the MK7, all trims have separate rear fogs, retaining both reverse lights, whether it's incandescent or LED tails
I agree with you 100%. They easily could've put a rear fog light below the reverse light. but like I said - only base models have these tail lights on RoW models. So it probably wasn't worth it for VW to take the extra time to make it that way since most people ordering the car will select the full led tail light option anyway.

But in all seriousness, it's not that big of a deal imo. Most people won't even notice that there's a reverse light missing.

Sent from my SM-G965U using Tapatalk
 

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I agree with you 100%. They easily could've put a rear fog light below the reverse light. but like I said - only base models have these tail lights on RoW models. So it probably wasn't worth it for VW to take the extra time to make it that way since most people ordering the car will select the full led tail light option anyway.

But in all seriousness, it's not that big of a deal imo. Most people won't even notice that there's a reverse light missing.

Sent from my SM-G965U using Tapatalk
Actually, you get a lot of random people commenting that one of your reverse lights is out, or something is wrong with your brake light. I've had that happen on my 08 Passat.
 

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Discussion Starter #15
On your euro switch, does it allow you to run fog lights with just the DRL LEDs on?
I'm not sure. On the switch I got I can pull it out to the front fog light position when it's turned to the auto setting. So if it was not dark, then I'd assume yes, the LEDs would be DRL-bright and the fogs would be on. I don't have front fogs so I can't tell you for certain. There may be some logic that turns on the lights (and dims the DRLs) if fogs are switch on, even in auto. Of course when the switch is set to parking/standing or the on setting, the LED DRLs would be dimmed.
 

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Discussion Starter #16
Status update - I'm pretty sure DHL loaded the tail lamp onto a canoe. It's been 14 days since the tracking showed any movement. Urgh.
 

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Discussion Starter #17
Update - DHL's canoe landed! I got the tail lamp today. First issue I see is that the connector has the channel block on the bottom. You can see it on the top left of the connector - the plastic is built up at the bottom. The black connector is the euro.




Compare that to the NAR female tail lamp connector (different color - I'm colorblind so I'm not about to guess what color that is), you see the channel block is at the top.





As shown in many DIYs switching to a euro tail light over the years here on the Vortex, you can just carve/dremel out the block with no negative effects. I'm going to do that because 1) it'll be easier to test fit the lamp to see if it's plug and play without having to switch any wire pin positions and 2) I prefer to work from the euro (new) tail lamp side to make it easier to go back to stock. You'll see in the pic I could just shave off the block on the car-side male connector, but then it's harder to go back to stock.

I'll do that and then report back if it was plug and play (after shaving the block).
 

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Discussion Starter #19 (Edited)
I'll start off with the celebration - HYFR! Shot after the install:





Shot while testing before installing:




Shot showing the lamp is a color match:



It's NOT plug and play. After shaving off the channel block, you will have to move some wires around. As I said, I like to work from the tail lamp side to make it quick to go back to stock. Working from the light-side you have to move 4 to 3 and then 3 to 4. Or, if you want to work from the car-side, you could just move 4 to 3. 3 is the rear fog light (lamp) and 4 (car) is the reverse light.

I'll clean this thread up and do a DIY in the next few days.
 
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