First of all I have no idea what is wrong with my 2008 Dodge Nitro. Today i drove perfectly fine to work. Now i was trying to run an errand during my lunch break and i went got in the car, and radio came on, lights came on from the inside but it would not start ( vehicle). I then walk back out side the car closed the door went back inside and tried it again .. everything, lights, horn, radio will not even come on. What can it be.. when i was about to go back inside where i work, i heard a computirized sound coming from where the brakes are and the gas petal.. what can this be.. please any help..