On Jun 14, 9:28*am, "RBM" wrote:
"Jim O'Brien" wrote in message

...

Hi,

We are suspecting that our 3-way dimmer by Leviton is defective. We
are trying to run connectivity tests with a digital voltmeter, and
very high resistance (1.6MOhms). Perhaps the mechanism in these
devices is such that it cannot be measured with a cheapo digital
voltmeter?

Thanks!

Too technical, forget the meter. First, if you have a Leviton dimmer, it's a
pos, so just get a Lutron of your choice and replace it. When you have the
existing dimmer out of the wall for "testing", remove it from the three
wires, noting the common wire. Touch the common wire to each of the
travelers. One of *the two connections should turn on the light. Flip the
other switch in the circuit, then touch the common to the travelers again,
and this time the other connection should make the lights come on. If things
don't happen as I describe, you have a wiring problem



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Agree; forget the meter; with solid state devices any high impedance
meter (including cheap or expensive digital ones) can give misleading
readings.
Just use basic fault finding; touch or bridge the connections over
(past the dimmer) to simulate what the dimmer/three-way switch is
supposed to do.
If that doesn't work then there is another problem somewhere.