Abstract: An electronic fuel conserving control system for multiple unit locomotive consists. The control system varies the throttle settings of the individual locomotive units among full power, half power and minimal power settings to operate the consist in a fuel efficient manner while maintaining the desired speed. Special features include automatic dropping of the locomotive to full power reduction when the air brakes have been applied for 30 seconds, a 90 second manual override period which is initiated when the dynamic brake is released after having been applied for 30 seconds, dip switch selection of the number of units available for dynamic brake loading, a power reduction button for quickly reducing power, minimum and maximum speed limit switches which establish a speed range in which the control system operates the train, and a solid state control circuit for controlling the governor solenoids of the locomotives in the fuel save mode of operation.