Code 303 which is related to a 12 volt supply produced by the display. Every wire to the display has been checked and verified, the frame is clean. The display itself swapped out with a good working unit. The 12 volt supply is at 12.58 every time you start the truck. If you leave the truck for 5 to 10 minutes with the key on it will fire and run most of the time. Turn the key off and leave it sit for ten minutes and it codes 303 every time. HELP

Thanks

ltrm812 at gmail dot com