Yes I am familiar with the false readings with these testers both positive and negative and I never stake my life on the reading. It's just a convienent tool always in your shirt pocket for peliminary checking but I have a solenoid tester in my bag too.
I understand why it lights up on a wire with induced voltage (magnetic field) but I had never seen it strobe continuously like that and I was just wanting to understand why. The best I can figure is 1.the ballasted lighting circuit in the same pipe was causing it or 2. maybe the motor start capacitor was leaking down?
Thanks, Brian
