When you first power up the truck it should come up to user ID, then you need to hit the "I" button twice until it states Atlet code or Authorized code, then enter the code 0002468, and this will take you into the menu tree. Then hit the "6" button until "set options" is displayed then hit "Enter" button to go into it, then you can scroll down with "8" button. If you are there and "Enter" button not working then either keypad or ribbon cable bad. Hope this helps.