While driving at approximately 35 mph we lost all systems including exterior, interior and emergency lights. we were able to stop without going off the road, once we had stopped and put vehicle in park we were unable to get it out of park. we could turn the engine on and off, but still could not get vehicle to come out of park, nor could we get the lighting system to come back on, the only lights that worked were the dash lights. the computer system indicated: 1- tow haul malfunction 2- tire pressure management system light on. had vehicle towed to ford dealer. they found several modules lost communication with bcm, reset system, test drove but unable to duplicate or determine what caused the problem. we were in a very dangerous situation as it was dark, we were on a turn in the road and in the center of the road with no emergency lighting. *tr