Are you talking about the Diagnostic Mode...(Referring to your steering wheel controls) Push and hold the Compass Button and the Music Button at the same time for about 6 seconds...the screen should change and then you should be able to scroll though the diag. options...Lots of neat stuff in theresteve said:Our magnum only has the temperature dispaly. What is needed to get the additional diplays in the led dash? Is it a simple flash from the dealer or is there additional wiring?