Having troubles with my 94 z28 A4. Attempted start up after a winter sitting, battery was charged and installed, all the accesories and radio, lights, everything on, but no voltage shows on the dash. Gets power intermittently and will start, but runs a little choppy at idle. Possible corrosion or contact issues? I need to have this thing right, and quick because i'm driving it across the country in a month when I move. HELP ME!

 

Definitely need to check the battery terminals, the ground connectios and the red positive terminal box for heavy corrosion. Check the ends of the wires as well for swollen insulation, indicating corrosion festering inside.