Blazing Zippers, isn't there an owners manual in the glove box of your truck? If not you can contact Ram Trucks to get a free one. Mine was in the lower center consul so the dealer ordered a new one and I found it before the new came in. If you have the bench seat look in the second or lower center consul and both upper and lower glove boxes it should be there.
I haven't used the factory brake controller yet as my boat has/had a surge brake system. I'm converting it over to a electric over hydraulic system and will be using the light electric over hydraulic setting. As was posted in the third post there are not any "medium" settings in the controllers settings.
Don