I recently changed my battery and a ton of problems started, The radio will not work and the little screen that shows when you switch into drive and other gears stays on. even when you turn off the car and have the key out of the ignition. and the airbag light stays on. This has never happened before. I have taken the radio out made sure everything was plugged in. Checked all fuses. Even replaced the radio and still havent found the problem. Could there be a short somewhere causein this to happen?