No, the blue wire and the lt. green wire CANNOT be interchanged. Use the light green wire for the clutch disengagement. In my install I did not use the blue tach wire at all- you have to choose which you want to use, the blue wire as a tach input to monitor engine over speed as a secondary disengagement or the light green wire to the clutch switch as a secondary disengagement. You cannot use both at the same time. My tutorial is based on using the clutch disengagement only, and leaves the blue wire disconnected.
As far as other wires and / or connectors, remember that the Rostra is a universal unit designed to work with many vehicles so there will be wires and connectors left over. It is not a particularly clean and neat installation because of this but you cannot connect any left over wiring to anything on the bike.
Some wires in the Rostra actuator harness (not the switch harness) are cut short and terminate under a wrap of tape. They are all there but some may be 'hiding'. Go back to the connector on the actuator itself and you will see all of the wires are actually present. I am not sure why Rostra cut some wires short but it is like a cheap magician's trick- it looks like some wires just disappear along the way down the harness. Maybe someone at Rostra is still chuckling about this?
Brian
Getting ready to install Rostra Cruise on my 09 Connie. Been reading Brian's install instructions from Murphs site and I find my Rostra unit does not have the Light Green wire that goes to a Black with white dots for the clutch disengage in Brians instructions. I only have the Blue Tach wire on my Rostra unit. Can this be used the same as the Light Green for clutch engage?
My Rostra also has a connector with a Black/Gray wire set labeled Optional Signal Generator. I assume this is not used since the Connie has the speed sensor.
Any help is appreciated.
Jeff