Gauge Dash tach wiring ? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

guitarman · 04-17-2002, 03:52 PM

Hello new guy here. My question is, how do you wire tach to HEI? The dash came with a tach lead. The lead has a push on right angle moulded plug that goes to the back of the tach, however the other end has two single push on moulded plugs that are actually on the same wire and then a rubber through the firewall gromet with a single dark brown or black wire with an eye-loop bolt on connector. Can anyone tell me where to hook up the two plugs and the round eye-let? HELP!!!!!!

guitarman · 04-17-2002, 06:00 PM

TTT, Come on guys help me out please.

*Gee_Emm* · 04-17-2002, 06:02 PM

there should be a terminal on the hei that you plug it into, near the other harness on the hei, the other inside funny looking wire goes to the fuseblock to ign unfused.

------------------
1969 Chevrolet Custom Camper 20 350/400 70k original miles, 99% rust free

They have the Internet on Computers now? --Homer Simpson

Gee_Emm's Page

Vote for my truck to be on the label of a bottle of Jones Soda!!!

[This message has been edited by Gee_Emm (edited April 17, 2002).]

guitarman · 04-17-2002, 06:18 PM

Gee Emm, thanks but where does the brown wire go? I know about the Tach lug on the HEI dist. cap. Since the harness was designed origionally for a points dist. Do you think that the wire with the round eye-let went to the negative side of the coil? If so that would be the wire to hook to the HEI diast. cap right?

*Gee_Emm* · 04-17-2002, 06:47 PM

Yes on the factory style harness the long brown wire went to the neg side of the coil, i just installed mine last week. So I am guessing that it would plug into the hei, ditch the round thing and put a plug in type on the end.

guitarman · 04-17-2002, 06:54 PM

Gee Emm you da man thank you.

JW · 04-17-2002, 09:04 PM

Three wires, four with a light. (-) Black to a ground, look on the back of the dash for a ground screw in the plastic circuit. (+) Red to IGN normally-on or use the fuse panel "Unfused", install an inline fuse. Green wire to the coil or HEI cap terminal, HEI marked "Tach". White wire for light connects to the light switch.

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72 Cheyenne Super, Fleetside, Shortbed,
Original Owner
Northern Calif

Longhorn Man · 04-17-2002, 09:35 PM

JW, your talkin aftermarket, I believe they are talking about a stock one.

------------------
'69 G.M.C. 350/350. Trying to clean up the left over damage from the Dope-Smokin-Old-Man
I've been dubbed the Longhorn Freak/Fanatic/Expert, I just hope I can live up to it.
FINALLY got the HORNIAC...a '70 one ton Longhorn with a Pontiac 350/350 and lots of 'personality'. Check out The Longhorn Webite.
If you need a pic posted, E-mail me at longhornmail@yahoo.com
Andy, in Columbus Ohio

guitarman · 04-18-2002, 09:01 AM

JW, Longhornmail is correct it's a factory tach. But thank you any way for trying to help me out I do appreciate it.

JW · 04-19-2002, 03:35 PM

LongHornMail & Guitarman

My son and I have a home business, we refurbish 72 Cheyenne interiors, sunvisors, door panels, glove box doors and 67-72 dashes.

We install either Camaro or Sun Super II tachs. The wire info I posted is for these two tachs. We hardly have request for the stock truck tachs.

Just wanted to be of some help.

We have been selling our customized dashes for $400, Sun tach slightly higher, currently backordered.

------------------
72 Cheyenne Super, Fleetside, Shortbed,
Original Owner, Special Ordered
Northern Calif

[This message has been edited by JW (edited April 19, 2002).]

04-17-2002, 03:52 PM	#1
guitarman Do it well or don't do it Join Date: Apr 2002 Location: Georgia Posts: 457	Gauge Dash tach wiring ? Hello new guy here. My question is, how do you wire tach to HEI? The dash came with a tach lead. The lead has a push on right angle moulded plug that goes to the back of the tach, however the other end has two single push on moulded plugs that are actually on the same wire and then a rubber through the firewall gromet with a single dark brown or black wire with an eye-loop bolt on connector. Can anyone tell me where to hook up the two plugs and the round eye-let? HELP!!!!!! __________________ Try to be the person your dog thinks you are. Excellent paint and body site: http://www.autobody101.com/ Visit my Web Site http://home.attbi.com/~agfosteriii

04-17-2002, 06:00 PM	#2
guitarman Do it well or don't do it Join Date: Apr 2002 Location: Georgia Posts: 457	TTT, Come on guys help me out please. __________________ Try to be the person your dog thinks you are. Excellent paint and body site: http://www.autobody101.com/ Visit my Web Site http://home.attbi.com/~agfosteriii

04-17-2002, 06:18 PM	#4
guitarman Do it well or don't do it Join Date: Apr 2002 Location: Georgia Posts: 457	Gee Emm, thanks but where does the brown wire go? I know about the Tach lug on the HEI dist. cap. Since the harness was designed origionally for a points dist. Do you think that the wire with the round eye-let went to the negative side of the coil? If so that would be the wire to hook to the HEI diast. cap right? __________________ Try to be the person your dog thinks you are. Excellent paint and body site: http://www.autobody101.com/ Visit my Web Site http://home.attbi.com/~agfosteriii

04-17-2002, 06:54 PM	#6
guitarman Do it well or don't do it Join Date: Apr 2002 Location: Georgia Posts: 457	Gee Emm you da man thank you. __________________ Try to be the person your dog thinks you are. Excellent paint and body site: http://www.autobody101.com/ Visit my Web Site http://home.attbi.com/~agfosteriii

04-17-2002, 09:04 PM	#7
JW Registered User Join Date: Apr 2000 Location: Carmichael, Ca Posts: 67	Three wires, four with a light. (-) Black to a ground, look on the back of the dash for a ground screw in the plastic circuit. (+) Red to IGN normally-on or use the fuse panel "Unfused", install an inline fuse. Green wire to the coil or HEI cap terminal, HEI marked "Tach". White wire for light connects to the light switch. ------------------ 72 Cheyenne Super, Fleetside, Shortbed, Original Owner Northern Calif __________________ 72 Cheyenne Super, Fleetside, Shortbed, Original Owner, Special Ordered 350ci/340hp, Auto Trans, 3:70 Posi, Tow Package Northern Calif

04-17-2002, 06:02 PM	#3
Gee_Emm Account Suspended Join Date: Sep 2000 Posts: 3,991	there should be a terminal on the hei that you plug it into, near the other harness on the hei, the other inside funny looking wire goes to the fuseblock to ign unfused. ------------------ 1969 Chevrolet Custom Camper 20 350/400 70k original miles, 99% rust free They have the Internet on Computers now? --Homer Simpson Gee_Emm's Page Vote for my truck to be on the label of a bottle of Jones Soda!!! [This message has been edited by Gee_Emm (edited April 17, 2002).]

04-17-2002, 06:47 PM	#5
Gee_Emm Account Suspended Join Date: Sep 2000 Posts: 3,991	Yes on the factory style harness the long brown wire went to the neg side of the coil, i just installed mine last week. So I am guessing that it would plug into the hei, ditch the round thing and put a plug in type on the end.

04-17-2002, 09:35 PM	#8
Longhorn Man its all about the +6 inches Join Date: Jan 2001 Location: Hilliard Ohio Posts: 2,690	JW, your talkin aftermarket, I believe they are talking about a stock one. ------------------ '69 G.M.C. 350/350. Trying to clean up the left over damage from the Dope-Smokin-Old-Man I've been dubbed the Longhorn Freak/Fanatic/Expert, I just hope I can live up to it. FINALLY got the HORNIAC...a '70 one ton Longhorn with a Pontiac 350/350 and lots of 'personality'. Check out The Longhorn Webite. If you need a pic posted, E-mail me at longhornmail@yahoo.com Andy, in Columbus Ohio

04-18-2002, 09:01 AM	#9
guitarman Do it well or don't do it Join Date: Apr 2002 Location: Georgia Posts: 457	JW, Longhornmail is correct it's a factory tach. But thank you any way for trying to help me out I do appreciate it. __________________ Try to be the person your dog thinks you are. Excellent paint and body site: http://www.autobody101.com/ Visit my Web Site http://home.attbi.com/~agfosteriii

04-19-2002, 03:35 PM	#10
JW Registered User Join Date: Apr 2000 Location: Carmichael, Ca Posts: 67	LongHornMail & Guitarman My son and I have a home business, we refurbish 72 Cheyenne interiors, sunvisors, door panels, glove box doors and 67-72 dashes. We install either Camaro or Sun Super II tachs. The wire info I posted is for these two tachs. We hardly have request for the stock truck tachs. Just wanted to be of some help. We have been selling our customized dashes for $400, Sun tach slightly higher, currently backordered. ------------------ 72 Cheyenne Super, Fleetside, Shortbed, Original Owner, Special Ordered Northern Calif [This message has been edited by JW (edited April 19, 2002).] __________________ 72 Cheyenne Super, Fleetside, Shortbed, Original Owner, Special Ordered 350ci/340hp, Auto Trans, 3:70 Posi, Tow Package Northern Calif



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