One problem related to back up alarm has been reported for the 2002 Ford F-250. The most recently reported issues are listed below.
Husband was packing up in parking lot w/our vechicle that had back-up sensors. Sensors did not go off and he hit a 3' pole. Granted he should have known the pole was there. . But we paid extra for these to work. I tae 50% fault but so should Ford. After picking up the vehicle from repairs we were told that all 4 sensors had to be fixed becuase of "over-circuit" or something.