Tachometer install. - The 1947 - Present Chevrolet & GMC Truck Message Board Network

81GMCSierra1500 · 07-03-2014, 07:47 PM

Hi all,

I've got almost all the way done on a tach install that should've taken about half an hour... I am curious how I go about putting the tach signal wire (green wire) into the "tach" port on the distributor... Also, how would I be able to reach the distributor without drilling a hole in my firewall? I wanted this to be easier than it is proving to be...

SkinnyG · 07-03-2014, 09:02 PM

Find an existing rubber grommet going through the firewall, and sneak it in through there.

motornut · 07-03-2014, 10:14 PM

Could run it into the wire harness.
I put an extra wire in mine for choke and tach.

81GMCSierra1500 · 07-03-2014, 11:07 PM

Quote:

Originally Posted by motornut

Could run it into the wire harness.
I put an extra wire in mine for choke and tach.

I would, but there is no wire running out of the "tach" port in the dizzy cap. Therefor, I have no way of "splicing into" a harness to get a signal... Do I go and buy the plug head for it, and run the wire directly into that? This shouldn't have taken me more than an hour to set up...

Keckdl · 07-03-2014, 11:30 PM

I used a female spade connector to connect mine to the distributor.

motornut · 07-03-2014, 11:38 PM

A stock hei tach spot takes a crimp/solder on connection.
I used a couple of stock wires from my 87 harness,fit right in empty spot.
And then add to that behind the fuse box.

07-03-2014, 07:47 PM	#1
81GMCSierra1500 Registered User Join Date: Jan 2014 Location: Courtenay, British Columbia Posts: 107	Tachometer install. Hi all, I've got almost all the way done on a tach install that should've taken about half an hour... I am curious how I go about putting the tach signal wire (green wire) into the "tach" port on the distributor... Also, how would I be able to reach the distributor without drilling a hole in my firewall? I wanted this to be easier than it is proving to be... __________________ 1981 Sierra Classic 1500, 305 4BBL, Ltd. Slip Rear End

07-03-2014, 09:02 PM	#2
SkinnyG Registered User Join Date: Feb 2012 Location: Beautiful BC, Canada, eh?! Posts: 2,267	Re: Tachometer install. Find an existing rubber grommet going through the firewall, and sneak it in through there. __________________ 1961 Apache: "Grabber Orange" Shortboxed, pancake, step-notch, air-ride, turbo, LS 1977 Silverado: Shortboxed & dropped, potato-potato V8 Pontiac Firefly (Chevy Sprint): The ultimate engine swap: 5.7L in a 1.0L bag Lotus Super 7 Replica: Scratch-built street-legal rollerskate

07-03-2014, 10:14 PM	#3
motornut 78K & 79C Jimmys Join Date: Nov 2009 Location: Ottawa Ont CANADA Posts: 7,901	Re: Tachometer install. Could run it into the wire harness. I put an extra wire in mine for choke and tach. __________________ John 1978 GMCJimmy4X4-350/203 1979 GMCJimmy4X2-305/350

07-03-2014, 11:30 PM	#5
Keckdl Registered User Join Date: Nov 2011 Location: Jacksonville, FL Posts: 37	Re: Tachometer install. I used a female spade connector to connect mine to the distributor. __________________ Dan 83 Chevy K10 Scottsdale, ZZ4, TH700r4, 4.10, 33"

07-03-2014, 11:38 PM	#6
motornut 78K & 79C Jimmys Join Date: Nov 2009 Location: Ottawa Ont CANADA Posts: 7,901	Re: Tachometer install. A stock hei tach spot takes a crimp/solder on connection. I used a couple of stock wires from my 87 harness,fit right in empty spot. And then add to that behind the fuse box. __________________ John 1978 GMCJimmy4X4-350/203 1979 GMCJimmy4X2-305/350



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