Why does the cruise control not always work on a 1998 Pontiac Sunfire?

The cruise control on a 1998 Pontiac Sunfire may not work due to several potential issues, including a faulty cruise control switch, malfunctioning speed sensor, or problems with the throttle cable. Additionally, if the brake lights are not functioning correctly, the system may disengage, preventing cruise control from activating. It's also possible that electrical issues or a blown fuse could disrupt its operation. Regular maintenance and diagnostics can help identify and resolve these problems.