On Tue, 23 Mar 2021 14:26:38 GMT, (Scott Lurndal)
wrote:

writes:
On Mon, 22 Mar 2021 15:17:09 -0700 (PDT), DerbyDad03
wrote:

Using a "tracer" is fraught with possibilities - including "induced
cross-talk"

As noted earlier, a meter reading would certainly tell us more.

Only if done right. I know many who've made that mistake.

Indeed. If, for example, your meter showed 34vac at the
light socket when the 3-way switched circuit was switched off, what would
your diagnosis be?

An inactive runner, capacitance from the hot runner, and a
high-impedance meter.