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Old 05-27-2005, 08:30 AM
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Mallory hyfire

Hi Iam installing a mallory hayfire ignition box in my street rod.The yellow wire goes to the tach.I want to know since my tack wire from my painless wiring harness goes to the pos side of the coil can i splice into that wire? Randy

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Old 05-27-2005, 04:30 PM
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Tach wire

Doc here,

Remove and extend the tach wire from the coil to the MSD yellow wire.

The other way, you run the risk of a back feed from one unit to the other, which MAY cause possible damage.

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