Need help guys, I have a 06 a4 2.0T. I was trying to install a auto meter boost/vacuum gauge. In doing so I went on a few form to see what wire i should tap into behind the light switch. Well I guess I tapped into the wrong one. I then tested another wire and tapped into the parking light wire behind the switch but the gauge light would only coming on when the parking lights were on and not the headlight, so i then tapped the gauge light to the headlight wire behind the light switch. It worked but after tapping into the other wires it says fuse below my odometer now and the light that illuminate for the a/c switch and radio will now say on even if car is off as well as the radio now. How can I fix the problem guys. I really need help.

Thanks

 

Sounds like you shorted something and blew a fuse, which you can replace.