Cruise control '03 malibu won't engage

Have the red LED indicator lighting up when the switch is set to on, but CC will not engage at any speed. I have the GM standard problem with the fan resistor pack failing and haven't replaced that yet, but see no other issues..suggestions, especially via email, greatly appreciated.
ronnyvous1 AT yahoo DOT com

Take a close look at the CC unit and see if the cable is not twisted.