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Old 06-29-2023, 10:35 AM   #12
pjmoreland
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Join Date: Jan 2005
Location: CA
Posts: 6,253
Re: temp gauge pegged hot

The 12 gauge pink wire in the TCS schematic that used to power an idle stop solenoid is a good wire to use for powering your HEI. The original coil power wire shouldn't be used because it is a resistive cloth-covered wire that won't provide high enough voltage for the HEI. If that original coil power wire is still there, it would be good to remove it from your truck, or at the very least, make sure it isn't shorting out on anything. Same thing with the yellow wire that runs from the cloth wire to the starter motor.
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