1999 Chevy Cavalier Gauges and Dash lights.

Electrical problem
1999 Chevy Cavalier 4 cyl Two Wheel Drive Automatic

The negative battery cable was corroded so I changed it. Unknowingly I cut the main grounding cable so I replaced that. The girlfriend was driving the car earlier today and she said she heard "clicking somewhere" I checked it out and a 30 amp fuse was blown in the under hood fuse block. I'm pretty sure it was the ABS fuse. I turned the car on and smelled burning wiring. I can't find what burned. Now the temp gauge freaks out and the indicators turn on and off by themselves. What's wrong? I have a feeling it's the "brain" but I'm not sure. Please help.