Hi all, my '08 z4 failed Pennsylvania state inspection because the fog lights do not disengage when the high beams are engaged. I never use fog lights and never even knew about this required functionality, but nonetheless its not working properly. Has anyone experienced this and found a solution? I tested the fuses in the glove box and they seem to be fine. My next try was going to be the relays that are behind the fuses, but they are more difficult to get to and I couldn't find specific instructions on how to reach them. So I thought I would ask the community before I went further. Thanks!
Fog lights and high beams
- Thread starter rliehrv
- Start date
Shropshire, UK
I think that's something that can be changed with coding, not sure which options it is but I do remember seeing something in Carly/NCSExpert around having the fog lights stay on when the high beams are on. Or presumably, turning off when the high beams are on.
According to chatGPT analysis of my light module trace (take it for what its worth)
The parameter you’re looking for is:
NSW_AUS_BEI_FL
This translates to “Fog lights off when high beams (Fernlicht) are on”.
So, if you want fog lights to stay on with high beams, set:
NSW_AUS_BEI_FL = nicht_aktiv
The parameter you’re looking for is:
NSW_AUS_BEI_FL
This translates to “Fog lights off when high beams (Fernlicht) are on”.
Details:
- NSW = Nebelscheinwerfer (fog lights)
- AUS_BEI_FL = off when high beams are active (Fernlicht)
Possible Values:
- aktiv = Fog lights turn OFF when high beams are on (default behavior in many regions).
- nicht_aktiv = Fog lights stay ON even when high beams are on.
So, if you want fog lights to stay on with high beams, set:
NSW_AUS_BEI_FL = nicht_aktiv
