matee
New Member
Posts: 4
|
Post by matee on May 15, 2024 12:57:58 GMT
Hi there,
I need help with connecting and coding the rear fog lamp on my 2018 GTI.
I bought a set of new European factory lamps at a good price with installation, and I managed to get everything up and running, coded except for the fog light.
According to the instructions, the wire should be connected to pin A72, but in my case, the wire from the front side position lights is plugged in there. Is there any other option besides unplugging that wire and inserting a new one for the fog lights? Maybe someone among you has already solved this issue. I am using OBDEleven.
Have a great day.
|
|
|
|
Post by dv52 (Australia) on May 15, 2024 21:01:03 GMT
matee : Hi. Hmm......... Ain't nowhere enough information provided about this car to make sense of this problem!!
What exactly is meant by "I bought a set of new European factory lamps"? Your literal words imply that you replaced the "factory lamps" in the tail-lights - is this so? If yes - did you change from incandescent to LED lamps? If yes, please provide details of the new lamps (a URL link).
Or maybe you meant that you changed the entire tail-light fittings? If this is what you meant- which version tail lights were factory installed in this car (incandescent, or LED)? The answer to this question determines how many wires were factory installed in the tail-light loom. And, if the answer is that you retrofitted Euro LED tail-light fittings to a "Yankee" car that was built with incandescent tail-lights, then you would have also needed to ALSO install a cross-wiring harness, This means that the tail-light installation is now non-OEM - which means that there are many different possibilities regarding how the tail-lights are wired and coded dependent on the manufacturer of the non-OEM new fittings. So. you need to provide URL links to the new tail-lights and the cross-wiring harness.
And finally, I'm sure that you will appreciate that because I live in the very, very deep south - my understanding of North America Region (NAR) Golfs is not good! However and IIRC, VW America made a change to NAR model Golfs in the middle of MY2015 in which the wiring on the central electrics module was altered for the rear tail-lights. Again IIRC - the change switched the rear "side-marker" lamp (which I understand is an American term for the lamp that I call "Public Lighting Lamp") from pin #72, socket A to pin #6, Socket C. Because this is a MY18 car, I suspect that this might be the problem - but I'm guessing because I simply have insufficient information about this problem
Don
|
|
matee
New Member
Posts: 4
|
Post by matee on May 16, 2024 6:30:36 GMT
Hi, Sorry, but I just noticed that I posted this in the wrong forum section! The car is a Golf GTI 7.5 from 2018, originally equipped with LED lamps, like the ones in the picture:  and I installed these: www.ebay.com/itm/296434708640?itmmeta=01HY019Q8EV65SFYRERT87WXQJand everything is working well, except for the fog light. Additionally, I've added an extra wire for the fog light, and here I need help because I'm not sure where exactly to connect it to the BCM and how to code it. |
|
matee
New Member
Posts: 4
|
Post by matee on May 16, 2024 9:44:34 GMT
So, is it possible to connect the rear fog lamp wire to the BCM in any available slot and code it as a rear fog light? Or is the only option to pull out the occupied pin A72 and replace it?
|
|
|
|
Post by dv52 (Australia) on May 16, 2024 10:42:42 GMT
Yes you did post in the wrong forum section - never mind, it's a misdemeanor that maybe will go unnoticed!! As I said in my first reply - this car is now non-OEM! There are literally hundreds of third-party manufacturers of these type of non-OEM fittings and each seller has a different design which means different wiring, different harness and different coding. Alas, I have not seen these particular tail-lights or this seller before. Are the coding/wiring instructions in a digital form that can be posted-up? So, is it possible to connect the rear fog lamp wire to the BCM in any available slot and code it as a rear fog light? Or is the only option to pull out the occupied pin A72 and replace it? hmm........ short answer is that it depends on how the BCM was factory coded originally and how it was built! Here is a picture of the BCM motherboard - this module is NOT a "Yankee" BCM, it's from an Aussie car which is installed in our Rest-of-world (RoW) models. I've included the 3 x socket designations on my picture for reference - notice that lots of pin positions are NOT populated! This will be your problem with simply using an unassigned Leuchte-set for the fog-light operation.
To explain: your BCM contains 35 x Leuchte-sets of which a hand-full are normally not used. The dormant Leuchte-sets vary with the BCM hardware/software part numbers but often (albeit, not always) when a Leuchte-set is factory disabled, the physical electronic components that are controlled by that Leucthe-set are not installed on the motherboard and also the pin is absent!!
So - if you are tempted to run the manufacturer's fog-light wire to the BCM and use a disabled Leuchte-set - I suggest that you first eyeball the socket and confirm that the mating pin on the BCM housing is populated!
BUT - didn't this car have a fog-light on the original factory installed LED tail-lights? If so, what happened to the factory fog-light wire and the factory Leuchte-set that controlled the fog -light? Did the Schwarz harness use the factory fog light wire for another purpose? If so, are there any spare wires remaining in the factory loom from the BCM to the tail-light connector that are unused? If there is a spare wire on the car-side of the tail-light connector- then this option seems to be a far easier option than running a fog-light wire to the BCM (and activate a factory disabled Leuchte-set)
Don
|
|
matee
New Member
Posts: 4
|
Post by matee on May 16, 2024 11:44:28 GMT
Hi,
thank you very much for your response.
I bought the lamps from a local VW dealer, they have part number 5G1052200C and come with installation instructions and necessary wiring.
It's about the so-called "floating turn signal.
"The car comes from Miami and didn't have a factory-installed rear fog light.
Currently, I pulled out the factory wire from the front position lights from pin A72 and connected the wire from the rear fog lights there, which I added, and recoded it in OBDEleven - it works.
Thanks for the tip about the BCM board - indeed, it may be that there's no unused pin to utilize. I'll try to look into it further. If I don't find anything, it will remain without front position lights (although I really like them).
Have a nice day!
|
|
