C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

tach install

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Old May 29, 2011 | 08:24 PM
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T-Toddy's Avatar
T-Toddy
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Default tach install

Hey fellows trying to install after market tach on my 1989 C-4. which wire do I tie into or plug into on the HEI Dist.
my tach wire is green. Any help appreciated!!! THANKS! T-Toddy
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Old May 29, 2011 | 09:08 PM
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87 vette 81 big girl's Avatar
87 vette 81 big girl
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The TACH wire output on your HEI.

It will be marked TACH next to BAT. on the ignition coil cover.

Believe it is a white or off white colored wire.

BR
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Old May 30, 2011 | 03:56 AM
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rodj
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Originally Posted by T-Toddy
which wire do I tie into or plug into on the HEI Dist.
my tach wire is green.
Find the factory white Tacho wire under the dash going between firewall connector and the instrument cluster plug; splice into that.

Saves having to run a new wire through firewall from dist
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