Our team finished wiring our bot a few days ago, and we ran into the same problem, we switched the PWM cables and some victors would work, then switched other PWMs and the ones that worked before wouldn't. I don't know exactly what was wrong with them, just that after a good half an hour of switiching PWM cables, we got them all to work. I would say that they aren't in enough, that would be the only explanation, atleast for ours. But anyways, we haven't run into any problems with the victors cutting off in our rigorous testing.
Good Luck
