Road glide radio switches off with headlights

LED headlights: daytime running lights switch off when they flash

Hello everybody,

my first post therefore thank you in advance to all the information I have already received through the forum.

In my TT 8J built in 2008, the previous owner installed the TTS headlights. The ones with LED daytime running lights. I think the new TT has now also installed this.

In addition to the rotary switch for light, I have a switch to turn the LED strip on or off (0 or 1). Normally the switch is set to 1, so the daytime running lights are on.

When I blink, the LED light turns off completely and comes on again after blinking. However, only on the side that is blinking.

Normally the LED light should stay on permanently. I tested this on a new TT BJ 2012. It is normal there.

Does anyone have any idea why this could be?

Thx

Chris

Best answer on the topic

dimming is normal, neither going out and light stay bright.

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15 answers

I don't (yet) know completely 'switch off', but you can also see 'dimming' (darkening) well on the A4 with LED DRL. As far as I know, this is also required under EU law.

Have a "normal" TT Bj 2012 and for me the side on which I blink dims to about 35% power. When the turn signal is off again, the daytime running lights go back to 100%.

The first TTS in a certain year of construction did not have the function of dimming when flashing.

Then I think it was added to the MJ change in 08/09.

But they should not go out under any circumstances, there is probably the worm in there somewhere;)

Quote:

Originally written by stealer00

The first TTS in a certain year of construction did not have the function of dimming when flashing.

Then I think I got it when I changed my MJ in 08/09.

But they should not go out under any circumstances, there is probably the worm in there somewhere;)

"Special cattle"

(whether Audi - Professional idiot (sorry) -Auto-Mecha "TRONICIAN"or Bosch service ...)

Getting it right at the 2nd or 3rd attempt can happen to anyone! (I'm sure, too ...)

But not checking the work in detail is bungling ...

Correct diagnosis THIS UNFINISHED WORK is only possible after reading out and proper error analysis because of the many options.

Is it a pin assignment error?

Is it a programming bug?

Maybe this is already known, there probably still some people Your conversion have made.

Hello,

my TT (BJ 03/2008) with retrofitted LED daytime running lights turns the LEDs off completely on one side when there is a blinking.

This is also included as a specification in the Audi retrofitting instructions.

If you are interested, I could look up which bytes those are, then you can change that. But whether it is still legal then ???

greeting

Toka

Quote:

Originally written by Toka_TT

Hello,

my TT (BJ 03/2008) with retrofitted LED daytime running lights turns the LEDs off completely on one side when there is a blinking.

This is also included as a specification in the Audi retrofitting instructions.

If you are interested, I could look up which bytes those are, then you can change that. But is it still legal?

greeting

Toka

Then all TTs, A4, A3, A5, A6, A7, A8, Q3, Q5, Q7, R8 are illegal after facelift: D

(then the diodes are only dimmed)

Quote:

Originally written by Toka_TT

Hello,

my TT (BJ 03/2008) with retrofitted LED daytime running lights turns the LEDs off completely on one side when there is a blinking.

This is also included as a specification in the Audi retrofitting instructions.

If you are interested, I could look up which bytes those are, then you can change that. But is it still legal?

greeting

Toka

The experts should argue about it, surely every third person has a different opinion ...

Of course, you have to know what should be, what is possible, what is allowed or what is forbidden ...

I have the rear lights on for the DRL, but according to Audi only allowed with parking lights at the front (Sweden package).

Who did it??? The authorized workshop did it! So it has to be legal or ??? : D: D: D (In case someone complains ...)

They took NOTHING for that.

Clearly: 1 (small) plus point for my Audi center.

Since they also have a (small) minus point, it has been canceled so far.

I draw consequences from 3 bigger minus points. : D: D: D

Thanks for all the answers.

Now there are some who say it is not normal (I am one of them) and others who say it has to be.

I had the behavior tested on a new TT at Audi.

The ignition was switched on and then the light switch was set to Auto. Then the TFL started. Nothing changed when it flashed. I could not detect any dimming. And you definitely have to see a reduction to 35%.

If this dimming has to be like that, then it should also always be dimmed or switched off. But it doesn't. Because if the light is on at night (switch is on Auto) then the LEDs are on plus the xenon headlights. In this state, the flashing is also normal (everything stays on - nothing is switched off).

I had only thought of a fuse that is over and triggers the behavior. But it would have been too easy.

So it will be the electronics as Bernd 35 suggests. I mean something says yes:

If the indicator is on, then the DRL off. That means I have to go to Audi and the friendly ones can help me. I just wonder why this behavior changes? As a layman, I myself cannot intervene in electronics.

It would be interesting, however, if this really is in the Audi retrofitting instructions. Maybe it has always been like this (6 months) and I never noticed it until now.

One thing is certain: It looks pretty weird and the new TT doesn't do it.

So with me they dimmer very well. Ud for the previous speaker: When the light is completely on, the DRL is also dimmed.

Believe here you are at the end of speculation and remote diagnosis ...

Provided the programming is ok, you can do this relatively quickly with simple means MEASURING OUTwhether "DER UMBAUER" may have forgotten something or put it wrong.

A good auto electrician will surely find the fault within 20-30 minutes and it doesn't take forever to fix it.

As a radio and television technician, you always have to be a little careful with statements.

Just because I once installed a wiring harness and know some terminals by their first names, I'm far from being a ROUTINED AUTO ELECTRICIAN ... and I have to be careful not to lean too far out of the window ...: D: D: D

Hiho, I saw the days on a new A6 and A7 that the LED DRL switch off completely when flashing. I will consciously pay attention to it during the days.

@Ehec tomato:

Right. I wasn't aware of that.

If I summarize that there are probably different behaviors. Nothing is really wrong. They are probably different electronic settings.

The next time I have to go to Audi anyway, I will ask how the behavior should normally be. But assume that they will say everything is fine.

Thanks to everyone for the clarification - you never stop learning.