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Old 07-08-2013, 05:02 PM
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Hey, Duff, I found my '54 book. Attached are a wiring diagram for a '54 Firedome, and an exploded view of a Powerflite transmission.

Looks like there should be two switches on the transmission; a neutral safety switch, and a back-up light switch. I believe the switch you have pictured is the back-up light switch. Judging from the drawing, the neutral safety switch should be just around the corner on the back of the main transmission case.

I would bet that the two smaller wires go to the back-up light switch and the two larger wires go to the neutral safety switch.....but I am only guessing, Some simple tests as Latech suggested should help you get it sorted out.

Hope this helps...
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