What could cause the speedometer and the odometer not to work on a 1999 mercury cougar and not give a trouble code?

The speedometer and odometer in a 1999 Mercury Cougar may fail due to issues such as a faulty vehicle speed sensor (VSS), a broken speedometer cable, or a malfunctioning instrument cluster. Additionally, electrical problems, like a poor connection or a blown fuse, could disrupt their operation without triggering a trouble code. If the VSS and cable are functional, the issue may lie within the instrument cluster itself. It's advisable to inspect these components or consult a professional for further diagnosis.