Im not currently living in the US
Back in 2008 i was charged with "Invasion of privacy" and sentenced to a 5 year probation in NJ.
I served that probation for almost 3 years. During this time i traveled few times to Europe and South America and my PO had no problems with it. Tired of living on probation i decided not to coming back again to the US. I'm a US citizen and I'm pretty sure there is a warrant against me now in the US for violation of probation . Since my family lives in South America i decided to live with them, but now we want to go on vacation to Europe and I'm not sure if I'm gonna be able to do it. I don't want to get arrested and extradited to the US. I don't think my offense was too bad since a didn't serve any time in jail.

Additional information from OP:
I just find out that i have a $20000 warrant waiting for me in the US. My crime was to violate probation when i decided to live with my parents in South America and never coming back to the US. I am an American Citizen and I'm not sure if i could freely use my American Passport to travel around the world (NOT USA) because I am really afraid that I'm gonna get extradited. What are the adds that they will find out if either I'm traveling to Europe or even countries in South America? Could I be extradited to the US? Is there any way that they know where I am now?
Please advice.
Thanx a lot!