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MSD rpm activated switch ?.
Does any body know what wires go where? There's 5: black, yellow, red, grey, and white. I'm guessing black=ground yellow=constant 12v red=ign. but whats grey and white. and there's a blue wire and red wire thats cut (like on the back of a tach where you cut the wire to pick 4-6-8 cylinder motor) what are they for? Any info is much apreciated.
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