The Times of Trenton, NJ, 12/26/14:
NJ Transit suspends Princeton Dinky train service due to mechanical issues
The Dinky train service in Princeton has been suspended until further notice due to mechanical problems, NJ Transit spokesman William Smith said Friday.
Story here.
Nothing about what those mechanical issues are. Assuming it has to do with the one 2-car "consist" assigned to the line. I wonder if they swap the equipment out once in a while for maintenance?