This one has me stumped. I've got a long, complicated run (several interconnections) between a FasTrack O-60 switch and its manual controller. The controller controls the switch correctly, but the controller isn't lit. I'm using track power on the switch, with the jumper installed. I tried a direct connection between the switch and another controller, and everything worked fine. I tried swapping controllers at the panel at the end of my problematic wire run, but the same problem appears, so it's very likely not in the controller itself. Is there any particular wire whose bad connection would cause this problem? Thanks for any advice.