Car stereo wont work

Question

I have a Clarion DRX6575z in a dodge Dakota 2001. I removed the factory stereo and put a wiring harness on the clarion and installed it. The stereo worked fine until i turned off the truck, and when i turned it back on the light would not work but would still play. i woke up the next morning and it came on again with no light, went to put in a cd and now the stereo wont work at all. i then tried to put the old stereo back in but it would not work either. i proceeded to check the fuses and nothing is blown that i can see. WHATS WRONG? -Desperate for music-