HEI Tach wire running?? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

jayharrell · 03-07-2008, 11:12 PM

Anyone have any idea where i need to run the Tach wire into the cab?? Is there a factory location that went into the fuse box, or did it just run through a rubber busing in the fire wall??

BTW i'm running a 455 buick HEI in a 69 CST10.

ttt

Andy4639 · 03-07-2008, 11:15 PM

The factory tach has a double connection on the back of it. The wire off the dizzy ran to the connector then to ground I beleive. It's been awhile since I really looked at it. You may want to wait for a better answer.

jayharrell · 03-08-2008, 01:30 AM

I see how it plugs up, just not sure how it made it into the cab. I guess i can run it through one of the extra plug wholes in the main firewall conector behind the fuse box.

desertPOS · 03-08-2008, 02:09 AM

I ran mine up into the 'sill' at the top of the firewall and into other wiring I have running through there, then dropped it back down after it made if past the brake master and ran it through a body plug that had another wire running through it (right next to the fuse box). Then just spliced the original connector onto it, lubed the end of the connector with connector grease, and plugged it in. If you REALLY want, I could probably get a picture later, but just run it as clean as you can and you'll be fine...

Andy4639 · 03-08-2008, 04:05 AM

OK I ran mine threw the opening where the old windsheild washer hoses came out. Sorry about that I didn't have a good understanding of what you wanted I guess.

jayharrell · 03-08-2008, 05:42 AM

NP.. thanks for the info. If the weather clears up i'll see what i mesh together outa everyone and take some pics.

byrd · 03-08-2008, 04:04 AM

there is a gromet near where the factory oil pressure line goes in the cab, that is where the factory tach wire is suppossed to be run...Randy

03-07-2008, 11:12 PM	#1
jayharrell Gettin By on Gettin By Join Date: Jan 2008 Location: Cedar Creek, Tx Posts: 1,033	HEI Tach wire running?? Anyone have any idea where i need to run the Tach wire into the cab?? Is there a factory location that went into the fuse box, or did it just run through a rubber busing in the fire wall?? BTW i'm running a 455 buick HEI in a 69 CST10. ttt

03-07-2008, 11:15 PM	#2
Andy4639 Old member Join Date: Jan 2002 Location: Liberty, & Garden City S.C. , U.S. Posts: 19,945	Re: HEI Tach wire running?? The factory tach has a double connection on the back of it. The wire off the dizzy ran to the connector then to ground I beleive. It's been awhile since I really looked at it. You may want to wait for a better answer. __________________ 1971 LWB Custom, 6.0LS & 4L80E, Speedhut.com GPS speedometer & gauges with A/C. 20" Boss 338's Grey wheels 4 wheel disc brakes. My Driver Seeing the USA in a 71 Upstate SC GM Truck Club 2013,14 and 2016 Hot Rod Pour Tour http://upstategmtrucks.com/ Get out and drive the truck this summer and have some fun! It sucks not being able to hear! LWB trucks rule, if you don't think so measure your SWB! After talking to tech support at Air Lift I have found out that the kit I need is 60811. Per the measurements I gave them. Ride height of truck inside spring and inside diameter of springs.

03-08-2008, 01:30 AM	#3
jayharrell Gettin By on Gettin By Join Date: Jan 2008 Location: Cedar Creek, Tx Posts: 1,033	Re: HEI Tach wire running?? I see how it plugs up, just not sure how it made it into the cab. I guess i can run it through one of the extra plug wholes in the main firewall conector behind the fuse box.

03-08-2008, 02:09 AM	#4
desertPOS Registered User Join Date: Sep 2007 Location: Arcadia, CA Posts: 78	Re: HEI Tach wire running?? I ran mine up into the 'sill' at the top of the firewall and into other wiring I have running through there, then dropped it back down after it made if past the brake master and ran it through a body plug that had another wire running through it (right next to the fuse box). Then just spliced the original connector onto it, lubed the end of the connector with connector grease, and plugged it in. If you REALLY want, I could probably get a picture later, but just run it as clean as you can and you'll be fine...

03-08-2008, 04:05 AM	#5
Andy4639 Old member Join Date: Jan 2002 Location: Liberty, & Garden City S.C. , U.S. Posts: 19,945	Re: HEI Tach wire running?? OK I ran mine threw the opening where the old windsheild washer hoses came out. Sorry about that I didn't have a good understanding of what you wanted I guess. __________________ 1971 LWB Custom, 6.0LS & 4L80E, Speedhut.com GPS speedometer & gauges with A/C. 20" Boss 338's Grey wheels 4 wheel disc brakes. My Driver Seeing the USA in a 71 Upstate SC GM Truck Club 2013,14 and 2016 Hot Rod Pour Tour http://upstategmtrucks.com/ Get out and drive the truck this summer and have some fun! It sucks not being able to hear! LWB trucks rule, if you don't think so measure your SWB! After talking to tech support at Air Lift I have found out that the kit I need is 60811. Per the measurements I gave them. Ride height of truck inside spring and inside diameter of springs.

03-08-2008, 05:42 AM	#6
jayharrell Gettin By on Gettin By Join Date: Jan 2008 Location: Cedar Creek, Tx Posts: 1,033	Re: HEI Tach wire running?? NP.. thanks for the info. If the weather clears up i'll see what i mesh together outa everyone and take some pics.



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