according to the yale service information i have the status code 062 is for the backup alarm driver being shorted, over-current protection activated.
The reverse signal output is shorted
backup alarm does not operate

-ensure all wiring is secure
-check wiring for shorts
-check for a shorted alarm
-replace dash display

disconnect the alarm and see if the code changes or goes away
check the back alarm wiring around the alarm and insure it is not shorted to frame of truck.
This truck supplies 24-48v to the alarm and uses the circuit connection in the dash display to supply a ground in the reverse circuit when reverse is selected.