Hi

I have Octavia 2010. And I replace the headlight switch to auto-switch with a light sensor from eBay. After that, I code with obdeleven to make the c/l home working automatically with door opening.

When I'm opening the door just the parking light turn on and after 30-second turn off without the headlight.

 Anyone know why the headlight won't turn on?

Did you fit the OEM auto headlight switch? And did you connect the extra wire to the BCM?

3 hours ago, slow_nick said:

Did you fit the OEM auto headlight switch? And did you connect the extra wire to the BCM?

if you mean to the yellow wire that came with the switch?

then yes.

i did exactly like this video

https://www.youtube.com/watch?v=ZIe7PMVcyMg

In VCDS there is an option that you either select to work the main headlights or the side lights together with the fogs (if your car has) but can't recall where exactly this is... 

I did change mine to sidelights and fogs rather that mainlights in CH/LH function. 

1 hour ago, AkisVH said:

 

I don't know if the BCM would even support CH/LH with the system you are using. You have one of the third party light switches with a light sensor, whereas the OEM system uses a light sensor behind the rear view mirror.

 

I don't know how that third party switch would work with it because presumably in the auto position, it just waits until its own light sensor determines it is dark and then sends the headlight ON signal. The OEM system doesn't work this way, the switch just sends position 2 (I think) and the car then knows you want the headlights controlled automatically. 

 

There is an option for the CH/LH lights to be activated by flashing the high beam quickly after taking the key out of the ignition. This doesn't require auto headlights at all.