Headlights and interior lights turning off and on

Hi guys, my car has developed a nice new issue, where the headlights started flickering on and off wile driving at night.
Also when I pulled over to check for any loose wires etc, with the engine running bit headlights turned off. I noticed the handbreak light would flicker so.etime as well, and sometimes the warning light for the roof will flash on and off as well.

Possibly a bag of worms trying to track down the issue, so thought I would see if anyone else has had this, and ideas of were to start.

Thanks.


2004 A4 B6 1.8t Cabriolet

Mine seems to be an electrical fault now, as I had the wipers on, and everytime the lights went out the wipers also stopped.

The strange thing is that with the engine off, and just the ignition on, everything is fine. As soon as the engine starts, the problems start. Even though the engine itself doesn't skip a beat.