Union Pacific LEGACY ES44AC Diesel #7454
This engines Legacy system works as designed. All drive motors work, forward and reverse. All lights,and sounds work from the Cab-2 controls.
The smoke heater resistor responds to the Cab-2. But the fan motor will not blow the smoke out of the stack.
The smoke motor runs if disconnected from the smoke control board, and 5VDC applied to it.
Any one have any insight into what could have failed on the smoke control board. 691SFC1102
Thanks in advance for your help