So i got this aftermarket auto headlight switch through the post today and fitted it. (MK2 CR170 FL 2.0 TDI VRS)

 

http://www.cars-equipment.com/www/en/shop/rvc-kits/oem-1z0941431j-3kx-auto-headlight-switch-2/

 

It users a lightsensor that you install on the dash and the auto headlight function appears to be working fine. However since installing it i seem to have an issue where intermittently when locking and unlocking the car the brake lights, DRL's and instrument cluster will start a "light show" blinking repeatedly and then eventually stop. I have never seen them do this prior to installing the headlight switch. Any ideas what is causing this ?

 

I have taken video of this to show what i mean. The "light show" starts at about 0:51 seconds into the video.

Video

 

Any help would be very much appreciated.

 

 

Edited 4 February, 20179 yr by djbarnat

What ever is happening it is basically turning your side lights on and off.

 

Bound to be headlight switch related. I'd be taking it out ASAP before it does any long term damage?

 

I'm assuming you don't already have the light sensor on the screen for the rain sensing wipers?

No i don't have the stock sensor. This kit provides a sensor which basically sits in between the original loom and the switch. This old thread had a number of people reporting success in getting auto headlights to function using these kits so thought i would give it a go.

 

Seems to work but not happy with this random side effect !

 

Will stick the original back in, hope it hasn't done any lasting damage.