The Volusia County Sheriff's Office said Jose Quinones, 19, climbed over a 7-foot fence topped with barbed wire at the training center in Stanford and rummaged through several military transports before finding a Humvee with a steering wheel anti-theft device that was loose enough to allow him to steer, the Orlando Sentinel reported Friday.
A spokeswoman for the center said the vehicles do not require keys to start.
Deputies said witnesses called 911 starting around 7:20 p.m. Wednesday and reported the Humvee driving without its lights on and blowing through red lights while dragging a construction barrel.
"There were sparks flying out from underneath it, and when he went across the light at Howland ... the barrel flew out from behind him,'' one of the 911 callers said. "And I was right behind him, and I had to swerve."
Quinones eventually stopped the vehicle in Deltona and got out when deputies drew their weapons on him.
"Quinones was very confused, mumbled and could barely stand,'' sheriff's office spokesman Brandon Haught said. "A marijuana cigarette was found in the Humvee."
The suspect was jailed on charges including grand theft, driving under the influence, driving an unregistered vehicle and marijuana possession.