Sorry Bill, kinda forgot to answer an important part of the question....
What speedo are you using? And NO, NOT the positive wire or positive plug wire on your speedo. Say if you are using a Novak speedo, there should be a short blue wire just "hanging" there by the receiver plug wire.
As far as polarity, I'm not sure, I'll have to read the manual. I use KO speedo so I didn't have to use the little capacitor.
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