VW Golf 5 brake light just as bright as tail light?
Hey guys, I have a technical problem with my Golf 5, model year 2006.
I took my car in for a general inspection (MÜV) a few days ago. They told me that my brake light was "defective." The list of defects stated: "Tail light faulty, unauthorized light source." Afterward, I took another look at my brake light, but at first I didn't know what the problem was, since my brake light and taillight were working perfectly. The "MÜV man" then explained to me that my brake light (the bulbs on the left and right outermost sides of the Golf) needed to be brighter than my taillight. He said they needed 21W bulbs. I then removed the taillight at home, but the brake light bulb was already a 21W bulb. I found a new 21W bulb in the basement and installed it, but nothing changed. The brake light was still just as bright as the taillight.
I have to present my Golf to the TÜV (German Technical Inspection Authority) without any defects by March 7, 2022 at the latest.
Does anyone have any idea what the problem could be? I would be very grateful if someone could help me.
Greetings Fati
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HERE you can see which lamp(strength) is specified
Just as I read: the brake lights have to shine more and more brightly than the back lights, clear case. Something like that is so unthinkable
Therefore, inadmissible flashback unit and if TÜV becomes more discernible, this is the way
Thanks for the first time, have just looked up, according to this website, 21w light bulbs are provided for the final light and brake light. But then it is clear that the brake light cannot be brighter than the final light?!
No car has backlights with 21W….5W or max. 10W, but then it's over.
Did you check the backlight bulbs?
Is it possible that the lighting unit has been changed and that does not correspond to the standard?
Yes, this can only be read out with the original tester if you specifically address this control device and read it out
Not all errors are stored in the error memory or not every non-original test device can also read out all errors
Yes, as far as I can remember correctly, the TÜV even did this, but there was nothing serious about the rear light/brake light.
But… I don't know if the year is dependent, but normally the TÜV nen dongle hangs on and reads the error store if what had been serious, then he would have said something.
Yes, hope it's nothing with the ECU 🙈. Thanks for your offer, very nice. However, I have a friend who can also read the error memory. Let's see if there's something about theory.
AH OK
Well, if they had CAN bus back then. It can of course be good that
It can be good that there is something in the argene on the CAN bus or rather on the control unit of the backlights. Theoretically, however, what should be stored in the error memory. As far as theory. If you were living nearby, I would have said come by, I have an original VAG diagnostic device available here
Apparently, that was on another forum where someone changed the pears from his backlight at the golf: "Not surprising that there is no light source with 5 watts for the backlight. The light sources for the backlight are dimmed via the CAN bus. If not braked, the lamps are darker (because the lamps are supplied with less voltage). Can't my CAN bus work properly?
Okay, anyway, thanks for your trouble.
THEN I don't know, then I'd go to a workshop and let them look, but please don't pay VW (you pay stupid and dirty) and also not ATU (they can't do anything)
I can't tell you if the lighting units have been changed. At least not from me. But what I can tell you is that the pears correspond to the norm. Once tried to install a pear with 2 "sockets/nipples", which was ultimately impossible. There are definitely the right pears in there.
Rear light of course but also the brake light is the same pear… Checked on both
If I do, then give a short update 🙂
But, according to Osram, the rear light is a P21W… And also a countercheck at Philips confirms this
Hello Fati00
You should check which light bulbs are at the backlights
Greetings HobbyTfz
Hi HobbyTfz, I just did. Are the same (P21W) as that of the brake light. On the light bulb holder, this also comes in both (back and brake light) P21W. If everything is true, I only wonder what to do now, or what the Tüv wants from me.
I can't imagine that from the factory in the case of backlights and brake lights there are equally strong light bulbs inside. The brake lights have to shine more and more. that's the way
Most likely, it must be at the workshop.
Then something doesn't work in electronics. Because the tester probably objected to this because the brake light does not shine more than the backlight
Less the coversation between me and michaelsal74, the light intensity of the brake light is supposed to be regulated by the CAN bus during the golf (dimmed when releasing the brake and brighter when pressing it). But have also made pictures of my light bulb frame, how can you get some parts?
Lg
He meant that the final light max. a 5 or 10 watt incandescent lamp (see manual of the car) is allowed and the brake light must be lighter with 21 watts.
Therefore the TÜV deficiency: final light faulty, inadmissible light source.
Sounds logical, you know where I get such a thing?
I edited my post.
You don't need amazon, but look at Osram or Philips, these are the only reasonable lighting databases for cars for me.
I had been following the list from there:
https://m.media-amazon.com/images/I/C19p7NXrBOS.pdf
Blinker would be a PY21W bulb.
But does not want to exclude that there is an error in the list.
Just got on the link, thank you. As far as I know, the lamp is for flashing light. I need to get a picture of the light bulb frame later. Perhaps it will become more understandable.
Original VW backlights installed? What's in the backlight for pears? 21W?
Yes, these are original VW backlights. I bought the golf from someone who had everything waiting for VW himself. Tip top checkbook.
Good question, that if I didn't check, I need to check.
Lg