98 Malibu Stereo Rewiring

I think I may have shorted out my internal stereo wiring. I've tried 2 known working stereos and neither of them our powering on. I've also tried my original factory stereo and it turns on but I only get static and NO time or display. Could my internal wiring be hosed? What's the best way to rewire it? does it goto a central location or does it spread throughout the car? Any help is appreciated thank you.