Hi, Got a F250 Super Duty Speed control inoperative. Went thru control test, light flashed correctly and no codes ,but throttle did not move/took cable off servo and servo wheel barely moves after doing test,supposedly it's not supposed to move much. Went thru voltage and ohm flow chart test and got to if speedo works check circuit 679 ,but it checks 0k. When I activate speed control the light comes on and thats all, also if I hit the brakes the light goes out. Anybody have any idea whats wrong with my speed control?

 

swapped in used motor box with top and now it works.

 

Thank you for taking the time to post the results of your efforts and the fix to the issue.
Ron