Just bought a 2005 Chevy Colorado with really low miles, but it's got a strange issue. when I turn on a blinker in either direction the brake light on the oposite side also flashes. I only noticed this because any time you have the cruise control set the blinker will turn it off. Im told theres a short between the blinkers and the brake lights somewhere which kills the cruise control. Anyone had this issue? anyone know where to start?