LT1 Tach wire

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Feb 23, 2003 | 11:51 PM

Twice The Fun

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Joined: Sep 2002

Posts: 342

From: Lubbock, TX

LT1 Tach wire

Ok, i am trying to wire up my window switch for my nitrous, but i cannot figure out which wire is for the Tach in the optispark....does anyone have any advice....

Feb 23, 2003 | 11:54 PM

shoebox

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Joined: Dec 1969

Posts: 27,725

From: Little Rock, AR

Tach output is A25 (white wire) on the pcm (that's the red connector).

Feb 24, 2003 | 10:46 AM

rmackintosh

Registered User

Joined: Oct 2002

Posts: 211

From: Danville, CA

If I were to run an aftermarket Autometer tach, would this be the wire to run to the tach for coil input? The car is gutted for racing only.

Thanks,

Randy