Tach signal wire is located at the PCM near the connector. Use
the manual should there be need for help in locating it.
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theirs a green wire by distributer that is for the tach
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There isn't one, you shift by "feel" or by the red tick marks on
your speedometer ,|,&.
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IF you have the installation instructions for the tach, it
prolly tells you where to attach the tach wire. If not, call the
manu. of the tach or search for their website online.