disconnected the battery and now can't use the radio. anyone know how to get the code to make it work again??

 

It should be in your manual. If you can't find it there, it can be under your ash tray or in the trunk. If you can't find it anywhere other than the manual, which most people don't, you will have to go to your local stealership. It costs anywhere from 50 - 100 bucks. They will give you the code too.