ZHUBL
The blinking headlight is a sign of bad antenna signal reception.
Try holding hand over both handrails if it works when in freak mode to all commands you have either a possible handrail grounded to boiler, or a wire has come loose inside the cab where it connects to end of handrail.
Another possibility is either the RCMC board and or the antenna board has failed.
Now when it freaks out will some commands work while others do not?
Try this test for me hold aux2 key for 3 seconds now try turning tender rear red lights on/off if like whistle it's acting same as mine did January of 2016.
Let me know results to above test suggestion's
