I finally got my motor together enough to plug in my DDT, but I'm not getting anything on the screen. Here's what I've got S/N OG362837 250 EFI:
Merc DDT Terminal
Ver. 5.0 Cartridge
84-822560A7 Cable
84-822560A6 4 pin to 4 pin cable
With everything inplace and plugged in, turn the key to "ON"............Nothing on the screen. According to the manual this should be all I need. DDT worked fine on my o'l 225x motor so I know it's not the DDT terminal...Am I missing something here ???????????????