cruise control

on my Buick lasabre limited the cruise control stopped functioning;
the on/off light goes on but to set the cruise does not catch on, is this something that I can fix myself? How?
Thanks dave

You may have a bad servo motor. The servo is under the hood and has a cable going from it to the throttle body. If you can get a live scanner hooked up and drive it while trying to engage the cruise, you can tell what is happening in that circuit.