Welcome to Pond Boss.
Hopefully someone with Moultrie experience will chime in, but two initial thoughts:
1} Timer unit is failing, and not sending power to the motor that throws the food.
2]Motors themselves are burned out-getting power but not rotating.
When you say "everything works fine" when you test wires from the motor to the battery, do you mean that the motors are working? If so, probably have bad control units, and should be readily replaced.
Good luck, and again welcome......
