I am towing behind a motorhome, but there is NO electrical connection to motorhome. I am using magnetic tow lights that are in no way connected to the Edge. I am using a braking system that pulls on the Edge brake so the brake lights on the Edge do go on. THis is a mechanical system that uses no Edge power (other that the brake lights). I have a monitor that lets me know the brakes are not on constantly. Others have this same problem, not only with Edges but many other vehicles. Apparently there are many things operating while in the ACC position. Some pull fuses (but not at all obvious in Edge which should be removed) , and some disconnect battery to solve the problem. Dennis