Who knows how to check speaker wire polarity?
Ladies and gents, I'm in the middle of changing out TVs, both front and rear on our '04 Itasca Horizon 36GD with the C-7 330HP CAT. Now, a small amount of history here. Winne and Itasca, in that era...
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+1 on the cone movement test. Another way if you can access the ends of at least one wire is to run a long connector wire to a multimeter and the wire to be tested. When you figure out which one connects where, the second one must connect to the other speaker lead. I have used both methods depending on the situation, sometimes watching the cone on small speakers is hard to tell.
