The other day I hooked up a new car battery....I didn't realize that the terminals were now opposite on the newer battery. A spark shot out and then the car came on and VIOLA! The headlights work....that's all that works. Nothing on the dash works: cd player, dome light, air vents, gauge lights, turn signals, brake lights, etc. What could be the problem? Checked all the fuses on the dash and they are all fine. Please help?