Tachometer wire up?

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this red from ignition to red from tach

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and this green or the red off coil

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Here is what I did..

Signal wire off the negative side of the coil

Illumination I just piggied back off the illumination wire for the rear defrost

Ground I just grounded to the dash support bracket by the radio

Ignition power I just spliced into the radio wiring

They are all fairly easy to get to