Headlight switch doing nothing

[Conorwalshmk3]

Hi all, I have a 2008 mark3 1.9tdi caddy

All of a sudden my headlight switch is doing nothing , the minute I turn ignition the low beams and dips come on automatic and this van does not have auto lights , front dogs and rear fogs are not working ,no loose connections and all bulbs are fine ,anyone any ideas?

[Doc]

Hi, welcome to the forum.
Sorry to hear about the trouble with your headlight switch.
If you have no access to diagnostics, it maybe worth trying to borrow a switch from another VW owner if you know one with a similar generation vehicle. Anything Golf or similar size will have a switch that will be compatible with yours.
They are dead simple to remove, just push in at the O position and then rotate clockwise while pushed. The switch should latch and then pull out.

[Conorwalshmk3]

Hi doc ,Thanks for the reply ,I have access to vcds and through a full scan and center electrics I’m getting no faults down to the lighting switch ,just a indicator bulb and other nit pickie bits ,I’ll try a different switch when I get the chance to source one for free

[Conorwalshmk3]

hi Doc ,diagnostic (vcds) isn’t showing anything up to do with lights ,tried swapping with a different switch and still no joy,checked fuses again under steering colum and also under Bonet in other fuse box with still no joy , I think it may be brang to auto electrician as I’m out of ideas

[Doc]

Did you check the light switch measuring blocks with VCDS, to see that the switch function is actually being read by the BCM?

[Conorwalshmk3]

Did you check the light switch measuring blocks with VCDS, to see that the switch function is actually being read by the BCM?

I havnt done that ,as I wouldn’t have a clue where to start to do it ,very little knowledge with vcds

[Peli]

Go to [Select], [09- Cent. E;ect.] and the [Meas. Blocks]. With the [Up] and [Down] you can scroll throw the Groups. I don't know the number you are looking for.

Maybe you can figure i out with the text by the blocks.

[Conorwalshmk3]

Still haven’t got a chance to try the live data , anyone off the top of their head know where headlight relay is