Ok,
here is what I've done so far:
I have the supplementary service manual explaining how to check the system for failure. I have followed every step in this manual, and everything seems ok. But it still doesn't work.
Checked the vacuum pump by connecting it directly to the battery - OK.
Checked the solenoid valve, both by feel the "click" when I turn the Cruise on and by measuring the resistance - OK.
Checked the actuator by connecting the vacuum pump directly to it and run the pump. The actuator moves, but couldn't move it enough to adjust the throttle. I'm not sure if it's better when thi engine is running or not.
Checked the control unit by following the instructions in the manual, and I also opened it to see if there were any bad connections or something - OK.
Greased all the throttle wires so that they move smoth.
I've also disconnected the trottlewire from the actuator and test drove the bike to see if the actuator moved at all when I tried to set the cruise control. It didn't. I have removed all the plastic items so it's easy to see when driving.
As far as I understand the indicator light should glow somewhat dark when it's in standby and glow brighter when the cruise is set. Mine glows somewhat dark both in standby and in set mode. Can this indicate something?
I've attached some pictures: