make sure your cc cable is connected to your pedal

 

I had a similar problem with my RSX. Turns out the wire harness was damaged due to abrasion.

 

Not only does the button light up, but there is also a green "Cruise" light in the dash (bottom row the gauge area) that comes on when cruise is successfully activated.

If that light appears after pushing the button, then you have a problem with the cable or servo box.

If that light does not appear then there is a problem with the cruise wiring.

 

Probably a bad fuse or a bad connection, either that or the switch in the set button is dead.

 

yes, the button on the dash also lights up, guess I'll check the CC arm or whatever that thing is.