Case IH Tractor ARM 39 Fault Code: Aux 2nd Remote Valve Lever Potentiometer
What ARM 39 Means ARM 39 is a Case IH tractor fault code from the ARM controller, which relates to armrest controls. The official description is: Aux 2nd remote valve LEVER potentiometer is failed. In practical terms, the tractor has detected a fault associated with the lever potentiometer signal for the auxiliary 2nd remote valve….