Yea it should be orange or orange with a stripe. Do you have a diagram with the harmonica terminals and the various circuits listed? I don’t have an 81 manual and only have an 80 diagram that doesn’t include the harmonica. I do have an aftermarket dash wiring document that shows a clock wire though. I’m not sure how else it would be powered.
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1977 Trans Am 400/4speed (swap)
Brian
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