Hope this helps:
www.superhonda.com
Another member was facing a cruise control problem, so maybe this thread will help you.

Cruise control failure
Hello guys. My 2011 Honda Fit (manual) is now 103k miles old The cruise control is not working. It engages (I can see the "Cruise Control" signal on the panel, but it does not hold the speed. I ordered a new one, installed it, but the same thing is happening. Do you know what might be wrong...
Another member was facing a cruise control problem, so maybe this thread will help you.