Mines was the Transistor speed control fried, there is power going to the blower plug but since transistor is fried no current went thru. I am substituing an old resistors from a w123 small enuf to stick it inside where the trans sat. With the air passing thru it will cool down the wire wound resistors.
I can join different color cable to come out with different speed, at the moment I left it with med speed , is adequate with air speed and should not fog up windows anyways.

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