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3 wire factory tach

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rancheromac View Drop Down
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    Posted: 14-October-2024 at 11:15AM
79 Ranchero w/ factory 3 wire tach, have msd and tach 6al tach adapter and blaster 2 coil. was my tach trigger wire connected to coil negative(voltage triggered tach) or connected to positive coil(current triggered tach) ? what does 3rd wire go to ? thank you
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