This is a link to McCruise to get your unit in diagnostic mode.
The computer in effect tells you what is wrong if there is a problem! Contact us for more FAQ!
www.mccruise.com
You may need to dig in deeper to get the right model. They have a trouble shooting guide that is very helpful.
If it’s a Rostra, remove the oblong rubber plug on the servo, it’s located on the top of the unit where the cruise cable comes out. hold the on button and the set button at the same time and turn the ignition to the on position.
Then release both buttons, you’re now in diagnostic mode. There’s a red LED light under the cover hard to see unless it lights up. Engage the front brake, it should light up, press the set button and it should light up, press the deacc. button it should light up. Now comes the tricky part. The bike should be on the centre stand and spin the rear wheel. The light will flash continuously. (This is only for the speed sensor that uses magnets on the rear wheel). The only way to stop the flashing is to turn off the ignition switches. If the light doesn’t flash in any of those tests then that is most likely your problem area.
If your servo is loose, that can also be an issue, it needs to be securely attached.
Check the cable to make sure it’s connected to the throttle cable, it may have come loose.