Like you, Hude, I can/could not make the DS tach work on my 2010 America (efi, elec. speedo). With warranty remaining and a strong fear of frying the ECU, I decided not to poke into the wiring from the ECU.
Factory tach ordered-should arrive by the weekend.
A barely used (< 90 days old) white face DS tach will soon appear in the classifieds for $50 shipped (lower 48). Will work on pre-2010 models without EFI and with cable speedo.
