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Not sure this is a great way to chase a wire, but when I took the wire (in initial question) off, and turned fan switch on, I got a loud click off what I assume is a relay under hood, but no fan speed.
Put the wire back to the Junction box and the fan runs on high speed in the high speed setting.
As I had posted earlier in separate posting, I have no fan speed in the low setting on the switch.
Are low speeds on fan on a separate circuit?
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