well, this is a common problem in our cars, it ends up being one of three things...
1) the cruise control module fucks up
2) the switch gets faulty
3) the wires that go from the module to the switch (right comming out of the arm of the turn signal for phase 2's) are soo tiny they get brittle and break, so depending where it broke, you either can just fix the wire, or you might have to get a whole new turn signal arm..
my cav has cruise, and after tearing the whole arm apart, i found the problem, it was number 3, and i thought maybe i could take apart the tube of the arm, but no, its not possible, the wire broke half way inside the arm, so i have to go buy another arm from a junk yard, lucky me eh?
