Tinko

Hi all, I have an 2016 A4 for just less than a year now.
When I turn all of the lights on using a button they work. They also work when doors are open.
However, interior lights don't work when I try to turn them on individually.
Front 2 lights are touch sensitive and rear 2 lights are operated by a button and none of them work individually. I have just recently discovered this (they worked fine until a month ago) and have no idea what the problem could be.
Any idea and suggestion will be very helpful.

A4Audi4Fun

There's a master On/Off switch in the overhead console - have you got that in the On position.

Tinko

Where would that switch be? I can't find it on my console.

A4Audi4Fun

The ones with the light symbol and the car symbol - I think the LED gets lit when they are in the on position.

Tinko

The one with the light turns them all on - that works. The one with the car turns them on when doors are open - that works.
The light itself can be turned on individually (just left or right light) and is touch sensitive (turns on and off by touching it) - that doesn't work anymore. Rear side has 2 lights that are turned on and off using buttons/switches (similar to the ones one picture) and individually they also don't work.
Hope that explains it better.

A4Audi4Fun

Sorry out of ideas - also thought it could be a fuse but you've confirmed things work with those master buttons unless the fuse operates on a different parallel circuit to the central electronics module. Would need a VCDS scan to see if any related error codes exist.

My Owner's Manual states the Interior Headliner Lights fuse is Position 8 on Fuse Panel B (red) located in Driver's Side footwell for my LH Drive vehicle.

LightRobin

I would say your best bet is to scan for any codes and report back, I believe the car wont let you turn on the individual lights if a door is open and you have the automatic door light function enabled. I had a quick look at the wiring diagram and I cant see anything obvious that could cause all 4 light buttons to stop working, the front two lights and switches are integral to the front roof module and the rear light is a separate assembly but again the lights and switches are one unit

Tinko

Thanks for the information. I did the scan yesterday and no fault codes popped up. The lights, however, decided to start working again, so I guess it's all fine now. Still have no idea what happened and why.