ECN Forum Forums General Topics of the Trade General Discussion Area Toner and Probe Wire Tracing Tips

Here's one every phone man knows...short the pair to kill the tone.
So you clip the toner leads onto the red and black conductors in a conduit that you think are the travelers for a 3-way circuit....there's some bleed-over tone on other black conductors in the three-gang box. Make sure the power is off and use a jumper to short each black to each red. When the tone goes dead, those are your wires.