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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.

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AnswerBot

1mo ago

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