Need A Picture of Stock Tach Harness Firewall Hole Needed - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**pjmoreland** · 03-25-2005, 12:12 AM

Does anybody have a picture they could post that shows where the tachometer wiring harness passes through the firewall on a truck originally outfitted with a tach? Thanks.

skokie · 03-25-2005, 12:54 AM

I dont have one but I would like to see the stock hole so I can run the wires correctly. TTT for ya..

JimKshortstep4x4 · 03-25-2005, 07:52 AM

Here is a picture of a 72 with factory tach. The wire hole is beween the fuse panel and the e-brake cable openings.

I am not sure if all years were the same. I have a 70 to look at and if it is different I will post a pic of it.

Jim

**pjmoreland** · 03-25-2005, 01:07 PM

Awesome. That's exactly what I was looking for. My truck's a '72, so that's perfect. I don't suppose you know what the diameter is of that hole? Thanks!

JimKshortstep4x4 · 03-25-2005, 08:57 PM

The hole is 3/4" in diameter. If you notice there are (3) dimples in the firewall plus the hole. You should have a dimple in the location where the hole is in the pic.

Skokie,

The 70 is different and I am not sure which location the tach wire hole was in
since the bottom two dimple locations on the 70 has holes, (one was tach, the other was the kickdown wire. To be safe, someone with a 68 should let you know where the tach wire location is.

Jim

03-25-2005, 12:12 AM	#1
pjmoreland Senior Member Join Date: Jan 2005 Location: CA Posts: 5,791	Need A Picture of Stock Tach Harness Firewall Hole Needed Does anybody have a picture they could post that shows where the tachometer wiring harness passes through the firewall on a truck originally outfitted with a tach? Thanks.

03-25-2005, 12:54 AM	#2
skokie Registered User Join Date: Oct 2003 Location: San Jose Ca. Posts: 3,342	I dont have one but I would like to see the stock hole so I can run the wires correctly. TTT for ya.. __________________ RIP to my son Dylan. 5/17/2002 - 8/18/2018 If you want to know more about rare forms of pediatric cancer or if you want to help fund pediatric cancer research, please check out the website for the non-profit I started. https://slothforpedcancer.org 68 build thread http://67-72chevytrucks.com/vboard/s...d.php?t=223234

03-25-2005, 07:52 AM	#3
JimKshortstep4x4 Senior Member Join Date: Jul 2001 Location: Muskegon,MI,USA Posts: 6,026	Here is a picture of a 72 with factory tach. The wire hole is beween the fuse panel and the e-brake cable openings. I am not sure if all years were the same. I have a 70 to look at and if it is different I will post a pic of it. Jim Attached Images

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03-25-2005, 01:07 PM	#4
pjmoreland Senior Member Join Date: Jan 2005 Location: CA Posts: 5,791	Awesome. That's exactly what I was looking for. My truck's a '72, so that's perfect. I don't suppose you know what the diameter is of that hole? Thanks!

03-25-2005, 08:57 PM	#5
JimKshortstep4x4 Senior Member Join Date: Jul 2001 Location: Muskegon,MI,USA Posts: 6,026	The hole is 3/4" in diameter. If you notice there are (3) dimples in the firewall plus the hole. You should have a dimple in the location where the hole is in the pic. Skokie, The 70 is different and I am not sure which location the tach wire hole was in since the bottom two dimple locations on the 70 has holes, (one was tach, the other was the kickdown wire. To be safe, someone with a 68 should let you know where the tach wire location is. Jim



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