FP, We do it all the time. What do you want to accomplish? Understand this about the tone generator: It's a low level audio signal generator with resistance in its output. If you connect that to an 8 ohm speaker, you won't get much volume, since 8 ohms is much less than the output impedance of the toner. But you'll get MORE output when feeding a higher impedance! That's why you'll often have ten 70 volt speakers playing louder than an 8 ohm speaker.
One test: We connect one lead of the tone generator to earth ground, then verify that the speaker wire is not grounded. We can then search around the property with the wand for tone, which tells us where the wiring goes. The wand will find the wire if the wire is not in conduit and the wand is within a foot, usually further, of the wire.
OR: We connect the two tone generator leads to the two speaker wires, which allows us to hear all the speakers that are connected (cb1 presents this as a problem, but I don't see why). With our magnificently calibrated ears, we walk around and do a Nipper* under each speaker to assess the volume as a crude means of ensuring that all the speakers are connected at the same power level.
*do a Nipper: angle our heads so we can hear better.
A good answer is easier with a clear question giving the make and model of everything. "The biggest problem in communication is the illusion that it has taken place." -- G. “Bernie” Shaw
