We were cruising down the interstate when all of a sudden we had zero power. No lights, no turn signals, no power steering, no brakes, nothing! Was able to pull over and off the freeway and came to a stop in a safe place. Determined the battery still has power. All the fuses look good. Anyone have any ideas on what could have happened and where to look from here? I have had it towed home and do not have a mechanic. Thanks!