BMP taillight coding help!

[r3alm]

I need help with my BMP Illuminator Taillights!

I've installed the taillights along with the included harness and almost everything functions as it should. The amber signals do their movement correctly but for some reason my outer brake lights still function as signal lights as well.

I have been in touch with BMP and they can't figure out what the problem is but we have confirmed that the issue is due to coding in my car but I cannot figure out what setting it is. I've gone over the coding guide from BMP ensuring that all the stock settings are correct as well as following their coding changes and still the behavior persists.

Please help me, you're my only hope!

I've included a link to a video of the problem below

1drv.ms/v/s!AqbQcMIVnAuzhZRFlT_4s0Ch-ym5DA?e=tLy1YP

[dv52 (Australia)]

r3alm : Hi.

hmm......... your video link doesn't work and you have provided no information about this car!! My hunch is that this is a "Yankee" model mk7 - but I'm guessing.

Based on very little information - please post-up screenshots of your coding for Leuchte20BR LA71 and Leuchte21BR RC8. To be clear, I need to see ALL 19 x channels for each Leuchte-set in your screenshots

Don

[r3alm]

Welp this is awkward..sorry about that. I assume by "Yankee" you mean North American in which case you would be correct. It is a 2016 MK7 Golf R.

I have attached the screenshots below. Hopefully they post better than my link did.

If you copy and paste the link it should work for the video. if you wanted to take a look. I've included it below I hope

HTTPS://1drv.ms/v/s!AqbQcMIVnAuzhZRFlT_4s0Ch-ym5DA?e=tLy1YP

[dv52 (Australia)]

hmm....... Yes "Yankee"= NAR (North America Region) model

OK, the problem with your video link is that video isn't on a platform that is compatible with the forum (when you click on the tab at the top of the post screen, you will see a list of the acceptable video platforms)

Anyhow - when you said in your first post that the "outer brake lights still function as signal lights as well" - I assumed that when you pressed the brake pedal, the brake light blinked ON/OFF. However, on your video, it appears that when the brake pedal is pressed, ALL the lights on the tail-light fittings on both car-sides blink ON/OFF! This is a very different dynamic!!

Let's commence by both acknowledging that the parts in your retrofit exercise are by definition non-OEM. This means that it's anyone's guess how the internal circuitry and electrical components in these "third-party" tail-lights are designed. 

The 2 x Leuchte-sets in your last post control the left/right side brake lamps - they are programmed to operate incandescent lamps at full illumination when the brake-pedal is pressed and at 10% illumination when the low-beam lights are turned-ON. Importantly in this case - neither Leuchte-set is programmed to operate as a turn-signal lamp. The lamps on your new tails are LED - but I must assume that in these non-OEM fittings, the mismatch in lamp-type is OK (by design)!

So, how to proceed? Well, notwithstanding your words "I have been in touch with BMP and they can't figure out what the problem is but we have confirmed that the issue is due to coding in my car" - I'm not so sure that this is a coding issue! Of course, my contention is based on very limited information

My hunch (maybe "guess " is a better descriptor) is based on the fact that it appears from your video that multiple lamps are involved this odd problem! If I'm correct, it doesn't make sense that this is a coding matter because coding generally affects individual lamps!!

Again, my guess is that this is a wiring problem because it impacts multiple lights on both car-sides. Now, I have no idea about the exact  likely cause of the error because both the tail-light fittings AND the cross-wiring harness are non-OEM. However, if this was my car, I would confirm the aspects of the retrofit project that are common to ALL lamps - namely the earth and battery-rail connections (I assume that battery volts are provided to the tail-light fittings via a Leuchte-set)

If you post-up copy of the the installation instructions (including the coding details) - I'm more than happy to make further suggestions

Don

[r3alm]

Thank you for your response and I appreciate all your help Don.

Let me try to explain this better.

The issue I am asking for help with has to do with the brake lights flashing when  using the signal lights. 

The intended function is that when I signal, only the amber light flashes.

The function the car is presenting is that the amber light flashes and the brake light flashes along with it. All other functionality is otherwise correct.

The reason I suspect that the issue is coding related is that I mailed the outer lights to BMP and they functioned on their mk7 as intended (only amber lights flashing when signaling). However I believe it  is a NAR MK7 GTI so I'm not sure if that is relevant but I'll reach out and ask for details.




I am not home at the moment so I cannot get files for the installation and coding guide but I will when I get home.

Hopefully this clears it up a bit. Thank you  in advance for all your help.

[dv52 (Australia)]

r3alm : Hmm..... I suspect that we are both talking about the same thing - but from different perspectives. Meaning that you seem to be looking at this problem as the brake-light causing the the turn-signals to operate -whereas my contention is that the turn-signals are being activated independently of the Leuchte-set coding on the Brake lights!

Anyhow, when you return home - maybe try the following coding change on the central electrics module:

You have said that this is a MY16 Golf! I'm not sure about NAR model Golfs - but in "Rest-of-world" model mk7s, a fundamental change happened around 2016 in that the central electrics module lost its long-code string and the software switches in long-code on previous modules were transferred to adaptation channels. 

Depending on which version central electrics module is installed in this car:

• If this car has a central electrics module with an active long-code string (meaning a non-zero long-code) - change the following:
  • Byte 06, Bit 7=0

• If this car has a central electrics module with an inactive long-code string (meaning a zero long-code) - change the following adaptation channel:
  • Aussenlicht_Heck-Bremslicht_ist_auch_Blinklicht (Exterior light_rear brake light_is_also_flashing light) > not active

Don

[r3alm]

Don

Based on your reply I looked at the long coding and it seems I still have the long coding capable central electrics module.
I was able to go in to byte06 and turned off the setting that says "Brake light is also flashing light" but it did not change anything.

I also looked in adaptations and searched for "Aussenlicht_Heck-Bremslicht_ist_auch_Blinklicht" which I could not find.

Unfortunately this didn't change anything about my lights behavior so I decided to disconnect the harness that was used for the signal lights in order to see what behavior my outer taillights present.

This resulted in no change in behavior of the brake lights blinking as signal lights.

Based on the coding, should the lights still function as signal lights when directly connected to the vehicle harness?

I would also like to mention that I am using an OBDEleven device but also have a VAGCOM cable if that would be the better method for coding in this troubleshoooting.

Thanks in advance.

[dv52 (Australia)]

As I have already said, the coding in Leuchte20BR LA71 and Leuchte21BR RC8 which drive the brake-lights do NOT have the turn-signal Leuchte-command.

Look at your screenshots that you posted earlier to confirm my assertion:

Notice that:

• Lichtfunktion A = Bremslicht = Brake-light
• Lichtfunktion C = Standlicht allgemein (Schlusslicht; Positionslicht; Begrenzungslicht) = Parking Light ("position lights" in USA speak)
  
• ALL other "Lichtfunktion" channels = nicht aktiv
  

This means that there are ONLY 2 x active light functions programmed onto the outer lamps on this car. Importantly, there is a complete absence of any turn-signal light-command on both Leuchte-sets. The Leuchte-commands for the turn-signal = Blinken links Hellphase (left-side) and Blinken rechts Hellphase (right-side).

So, with the caveat that I know nothing about these non-OEM tail-lights and with the programming of the Leuchte-sets for the brake-lights as per your previous post - there should be NO blinker signal coming from the central-electrics module when the brake-pedal is pressed!!

Again, I know nothing about these non-OEM tail-lights - but if you have disconnected the harness which you say "was used for the signal lights and the outer brake-lights still operated as turn-signals" - then if there is NO blinker signal coming from the central electrics module, the obvious remaining area to investigate is either the fittings themselves AND/OR the local wiring arrangement post-retrofit.

Remote diagnosis via a forum like this is far from an ideal medium - nevertheless, I suggest the way forward here is a process of elimination!!  Your test removing the harness is a good first step towards this method - but maybe you need to take a few additional steps? 

If this was my car I would try disconnecting one of the outer brake-light fittings and plug-in the original fitting into the factory tail-light connector (i.e. without ANY BPM wiring connected to the original tail-light). I assume that there was NO modification made to the outer factory tail-light connector for this project - meaning that none of the original factory wire positions were changed/de-pinned on the 4 x pin factory connector

With the old fitting connected to the factory tail-light connector and without any BMP wiring -my hypothesis about NO blinker signal to the brake light from the central electrics module can be confirmed.

Don

[r3alm]

dv52 (Australia)

I do appreciate all of your help.

To clarify: I did plug the outer taillights directly into the vehicle harness and they still blinked as signal lights when using the turn signals. 

I also plugged the factory halogen taillights in without changing any coding and they also behaved as signal lights when using the turn signals.

Do you think this may be a wiring issue on the vehicle side harness? I have not modified the vehicle harness in any way while I've owned the vehicle.

I do apologize I did not catch it sooner but the issue I am seeking help with, is related to using the turn signals in the vehicle and not the brake pedal. The brake lights are functioning as expected.

I hope this adds some clarity.

John.

[dv52 (Australia)]

John: I'm still not sure of the complete environment with your tests, but - if you want to confirm whether this is a coding problem - then do this:

1. COMPLETELY unplug the harness from one car-side.
2. Insert the outer and inner factory tail-light connectors (i.e the factory wiring loom) into the original incandescent tail-light fittings.

With this set-up the tail-lights on one car-side use the original factory equipment ONLY and the other side uses the modified BMP set-up. 

With the BMP coding and with the physical arrangement as above:

• If the odd blinker behavior persists on the tail-lights on both car-sides, this is a coding problem
• If the odd blinker behavior occurs ONLY on the car-side with the harness (and the BMP fitting), this is NOT a coding issue

Don

[r3alm]

dv52 (Australia)

I left the left side as is and on the right side I reconnected the factory taillights to the factory harness directly. The factory taillights both behaved as signal lights when using the turn signals.

Assuming I didn't mix up the instructions you provided, it seems that the issue is coding related as the odd turn signal functionality persists on both sides when connected as you recommended.

Please let me know what you suggest I look in to next. I have also attached the coding guide from BMP in case you wanted to look it over.

Attachments:

bec-led-eds-mk7-5-tail-lights-coding-guide 1.pdf (256.71 KB)

[dv52 (Australia)]

This is the wiring set-up for these tail-lights:

You say "on the right side I reconnected the factory taillights to the factory harness directly". 

Look at the "FACTORY NAR WIRING" part of the diagram (i.e. the top row). Notice the wire connections from the tail-light socket to the central electrics module for the right-side like this:

• INNER RIGHT:
  • A65=reverse light
    
  • A64=turn-signal
  • GND=earth
    
• OUTER RIGHT
  • C8=Brake-light
  • C6=Parking-light/Position-light
  • GND=earth
    

Note: I've added the lighting function that will result from the BEC instructions for each wire above

So, with the following set-up on the right-side:

• The factory incandescent tail-lights plugged into the factory wiring loom connector (i.e. NO "BMC harness")
  
• The Leuchte-sets coded as per the "BEC instructions" attachment in your last post
  
• The right-side turn-signal activated and no other tail-light lighting-function activated
  

I would expect the following

• INNER RIGHT: flashing turn-signal on the lamp that previously was factory coded as a Parking-Light lamp
  
• OUTER RIGHT: NO lamps illuminated

If the OUTER RIGHT fitting flashes with the se-up above - which of the previously factory coded lamp positions flash (the Brake, or Public-light lamp)? If it's the lamp that was factory coded as the Brake light, switch-OFF the turn-signal and press the Brake pedal - what happens to the lamps on the right-side inner/outer fittings?

Don

[dzannnn]

Hello, i got obd nextgen and my friend got Audii A8 2019, i dont know why tail lights dont working, i spend 100cr and dont work. Please help me and tell what to do]

[dzannnn]

Hello, my friend has an audi a8 2019. I bought OBD Ultimate and tried to open the tail light animation, I don't know why and what is the problem. Please help me to solve the problem because I can't unlock the animation of the rear lights. Nice and thank you

[dv52 (Australia)]

dzannnn : Not sure why you have posted here. This part of the forum is for VW Golf Mk7s which have a MQB platform build. I'm not certain - but I suspect that a MY19 Audi A8 is a type D5, which has a MLB-evo platform.

I suggest that you ask your question on the Audi A8 part of the forum

Don

[r3alm]

dv52 (Australia)

I confirmed that the wiring on the right side matches the wiring diagram you posted.

I also confirmed the coding is correct

With this setup:


The factory incandescent tail-lights plugged into the factory wiring loom connector (i.e. NO "BMC harness")

The Leuchte-sets coded as per the "BEC instructions" attachment in your last post

The right-side turn-signal activated and no other tail-light lighting-function activated

The outer right light flashes when the signal is activated with no other tail light lighting function activated.

[dv52 (Australia)]

If the outer right light flashes (and no other light flashes) - it means that something is wrong with your coding.

Post up Leuchte24SL HRA65 and Leuchte21BR RC8

[r3alm]

dv52 (Australia) My apologies, the inner light also flashes as well as the outer light when signaling.

[dv52 (Australia)]

yes - that's better, It just didn't make sense that the inner fitting didn't flash. However, the outer fitting should NOT flash with the BMP coding

Leuchte21BR RC8 looks OK - check the coding on Leuchte27NSL RC6

[r3alm]

dv52 (Australia)




Let me know what else I can do.

John

[dv52 (Australia)]

John - this just doesn't make sense!! You said that both the outer and inner right-side tail-light fittings flashed when you conducted the test,

I can understand the inner fitting flashing because the coding on Leuchte24SL HRA65 has Lichtfunktion A 24= Blinken rechts Hellphase.

However it doesn't make sense that the outer fitting flashes. Look at my wiring diagram above - notice that the outer right-side fitting has only 2 x wires labelled C8 and C6. Then look through Leuchte21BR RC8 and Leuchte27NSL RC6 that you posted. There ain't any Blinken rechts Hellphase in either of these Leuchte-sets. How can the outer right-side flash?

I really don't understand !!! Just to be absolutely sure - please confirm that this is a North America Region model Golf. What is the history of this car? Did you purchase it new? Was the car factory fitted with incandescent tail-light lamps?

Don

[r3alm]

dv52 (Australia) I agree with you. I was beginning to think I was crazy tbh.

How do I see where the label is? I can't find any labels. I matched the colors of the wires to the diagram.

The vehicle is, as far as I know, is NAR. It was purchased in Florida then made it's way to California over it's lifespan. I purchased it used from Carmax last February.


No contact with PO to ask what was done but the vehicle did have factory incandescent tail-light lamps as it is a 2016 model year.

[dv52 (Australia)]

OK- I'm determined to get to the bottom of this problem!!
Repeat the same test as before and using a multi-meter, find out which of the pins on the outer fitting is providing the blinker signal. The blinker-signal can ONLY be either pin #1, or pin #3. My hunch is that for some unknown reason the wiring on the central electrics module is non-standard on this car (I have no idea why)

Then make a backup of the central electrics module and provide a copy in a post (use the attachment facility rather than dumping the data directly into the post because the backup will contains lots of data)!!

Don

[r3alm]

dv52 (Australia) I've attached what I think is my backup of my car's coding. Please let me know if it is correct. I still need to get around to testing the wires with a multimeter though.

Attachments:

history.txt (487.17 KB)

[r3alm]

dv52 (Australia)

I tested the outer harness (body side) for voltage and I get voltage when signaling as well as braking at pin#1. pin#3 provides no voltage unless the running lights are on.

[dv52 (Australia)]

Hmm......... very strange!! Your voltage test on pin #3 is OK - it's as expected!!

You said earlier "I believe it is a NAR MK7 GTI" and we have been proceeding in this thread on the belief that this is indeed a "Yankee" car. The other foundational assumption that has underpinned our discussion in this thread has been that this car had incandescent tail-light as factory installed.

So the wiring for this car that we have been using is:

But there is clearly something very odd with this car!!

From the back-up file in your latest post - these are the Leuchte-sets that have been programmed as turn-signal lights in the wiring loom that terminates onto the tail-light connectors:

Right-side:

• Leuchte24SL HRA65
• Leuchte19BLK HRC31:
• Leuchte17TFL R BLK SRB3TFL R BLK SR KC3:
  

Left-Side

• Leuchte23SL HLC10
• Leuchte18BLK HLA60:
• Leuchte16BLK SLB35BLK SL KC9:

Remember that the last 2 x digits in the Leuchte-set names identifies the socket/pin number that is controlled on the central electrics module. 

According to the wiring diagram above, your voltage checks and your your back-up data, the DCM harness is NOT compatible with the wiring arrangement on this car because pin#1 on the outer fittings should be the brake lights and they should be connected to A71 and C8 - so Leuchte20BR LA71 and Leuchte21BR RC8 should be the correct Leuchte-sets. Note as per our earlier discussion - neither of these Leuchte-sets is programmed with a turn-signal function

The harness is also incompatible because it assumes that the ONLY left/right pair of turn-signal pins on the tail-light connector for the inner fittings should be C10 and A65 (i.e. Leuchte23SL HLC10 and Leuchte24SL HRA65) - see the wiring diagram above. However, this car has 6 x Leuchte-sets dedicated to the turn-signals on the tail lights!

And, since the DMC wiring harness is incompatible - the coding instructions for the DMC harness is also incompatible!

Because you say that on this car pin #1 on the outer fittings is a turn-signal pin - it means that one of the 6 x Leuchte-sets listed above must be connected to this pin.

To find-out which the socket/pins on the central electrics module is connected to pin #1 on the outer fitting - try temporarily changing Lichtfunktion A on each of the Leuchte-sets listed above to nicht aktiv and activate the turn-signal for that car-side. Hopefully you will find that for one of the changed Leuchte-set, the turn-signal should be disabled on pin #1

Don

[r3alm]

Leuchte19BLK HRC31
Leuchte18BLK HLA60

Those two fixed my issue! I changed them to nicht aktiv and it got the brake lights to stop blinking on signal! I also tested and ensured that the brake lights still functioned as expected! THANK YOU SO MUCH!

Also, I did just realize based on your last post that we are operating as if my car is a GTI but i'm not sure if it matters but it is a Golf R. Does this fix mean that my vehicle may not originally be a NAR Golf?

[dv52 (Australia)]

r3alm : hmm........ well done for fixing the error!!!! 

Do you get any errors on the SCAN report?

The reason why I ask is because if Leuchte19BLK HRC31 and Leuchte18BLK HLA60 fixed the turn-signal problem - it means that pin#1 on the outer fittings on this car are connected to the central electrics module connectors like this:

• Left-side: pin #60, Socket A
• Right-side: pin #31, Socket C

Now, pin #1 on the outer fittings is meant to be the Brake-light and currently, neither of the 2 x Leuchte-sets that control this pin on each car-side are NOT programmed as a Brake-light. In fact, if you followed my instructions on Lichtfunkion A, these Leuchte-sets are effectively non-operable. 

Instead on this car, Leuchte20BR LA71 and Leuchte21BR RC8 have been coded as Brake-lights - I have absolutely no idea where the wires from pin #71, Socket A and pin#8, Socket C terminate on the tail-lights on this car!!

If there are NO errors on the SCAN report, then let's forget the matter - I guess!!

As for your question regrading the GTI versus the R version, I don't have many NAR cars in my database - but I have found the 2 x Leuchte-sets coded as per you car on a 2017 NAR Golf Alltrack SEL with Driver assist (which has incandescent tail-lights factory fitted)

Don