I purchased the truck from an individual who towed a trailer with electric over hydraulic brakes. My trailer has electric brakes only. I want to change the setting from the Heavy EOH setting to Heavy Electric. Unfortunately, when I adjust the display to the trailer brake setting, I can't seem to find a way to go from the current EOH to Heavy Electric. In fact, the Heavy EOH display is quite faint in the display, not unlike what you might find on a computer screen where scrolling over a lightly colored icon can't be clicked by the mouse. Is it possible that my current trailer simply isn't compatible with the ITBM system?