How Do I wire a Factory Tach? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**leddzepp** · 06-11-2009, 05:39 PM

Can't find the info in FAQ. Got a tach harness, and no instructions came with it. It plugs into the back of the tach, has a pink wire (power) and a brown wire (coil) Where on the coil do I connect the brown wire? Pos side or Neg side? DO I need a ground wire also? Thanks. This is for non-HEI, factory ignition...otherwise the wire just goes to "tach" on the cap!

Longhorn Man · 06-11-2009, 05:48 PM

neg post on the coil.
The tach grounds through the inst panel

**leddzepp** · 06-11-2009, 05:50 PM

Thanks Andy, I'm going back out to hook it up now.

06-11-2009, 05:39 PM	#1
leddzepp Moderator Join Date: May 2007 Location: Southern Cal Posts: 19,996	How Do I wire a Factory Tach? Can't find the info in FAQ. Got a tach harness, and no instructions came with it. It plugs into the back of the tach, has a pink wire (power) and a brown wire (coil) Where on the coil do I connect the brown wire? Pos side or Neg side? DO I need a ground wire also? Thanks. This is for non-HEI, factory ignition...otherwise the wire just goes to "tach" on the cap! Last edited by leddzepp; 06-11-2009 at 05:41 PM.

06-11-2009, 05:48 PM	#2
Longhorn Man its all about the +6 inches Join Date: Jan 2001 Location: Hilliard Ohio Posts: 2,693	Re: How Do I wire a Factory Tach? neg post on the coil. The tach grounds through the inst panel

06-11-2009, 05:50 PM	#3
leddzepp Moderator Join Date: May 2007 Location: Southern Cal Posts: 19,996	Re: How Do I wire a Factory Tach? Thanks Andy, I'm going back out to hook it up now.



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