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09-09-2010, 11:53 PM
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#1 |
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Registered User
Join Date: May 2009
Location: Sparks, NV
Posts: 913
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tach cluster
just picked up a tach cluster at the pick n pull. need to know what modifications need to be made to my wiring harness. i think i can go back and grab the main gauge harness out of the same truck. i'm converting from my stock 79 gauges to this 73-75 style tach cluster, but i plan on using my electric oil pressure gauge, and voltmeter. i know the wiring will be mismatched, so how do i make it work? thanks
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Greg 1974 GMC 1/2 Ton SWB Fleetside L33 5.3/4l65e .................__
............._____l __\__ ..............l_(O)_ l___(O)] |
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09-09-2010, 11:59 PM
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#2 |
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Badass
Join Date: Jan 2009
Location: lox. fl
Posts: 4,586
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Re: tach cluster
send me the cluster and forget the headaches (: haha i know you have to run a wire to the distributor to get a tach reading
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Think outside the box? -84c10 (1stcar)→My Build←  -00 Saturn 5spd drop a gear and disappear! 1/4:13:90 
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09-10-2010, 12:42 AM
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#3 |
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OutOfMyMind & I'llNeverKnowWhy
Join Date: Apr 2004
Location: Another world, some other time
Posts: 672
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Re: tach cluster
I just did mine but it has the gas gauge built into the tach, but for the ammeter to voltmeter change, one contact has to be moved from the 3 o'clock to the 12o'clock position for your old voltmeter to work with the new circuit board. Once you have the old one out, place them side by side and you see what needs to be moved. You'll also have to remove some of the clear insulation over the copper trace.
No need to swap harnesses. You can remove each wire with a small screwdriver and put it in the correct location for the new cluster. You do need the tach harness tho. For the oil gauge, the mech gauge physically mounts differently to the housing then the elec one so you might have to make some kind of bracket up.
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-Justin-Out of my mind and I'll never know why 1976 Chevrolet Silverado C10 350 4bbl / TH350 Big10 longbed 1986 Pontiac Firebird T-Top 5.0L TPI 700R4 WS6 1992 Pontiac Firebird T-Top 5.0L TBI 700R4 My cardomain page  I don't like to save, it's more fun to spend!! Last edited by Justins76; 09-10-2010 at 12:45 AM. |
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09-10-2010, 12:50 AM
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#4 |
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In the Forgotten far North.
 
Join Date: Jul 2007
Location: Anchorage, Alaska
Posts: 2,627
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Re: tach cluster
Wiring for an amp meter gauge has a built in shunt somewheres in the system. Where I have no idea, You can't simply switch the cauges and call it good unless of course you wanna let the smoke outta all your wiring.
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1987 R3500 CREW CAB DUALLY (BIG RED)Acquired 06/12/2015 1990 chevy suburban V2500 5.7L My cluster Mods-Nov 2007 overhead console Stereo install Round 2 Aug 2009 Heated/turn signal mirror upgrade |
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09-10-2010, 12:53 AM
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#5 |
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Registered User
Join Date: Nov 2000
Location: Ft. Mill, SC USA
Posts: 931
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Re: tach cluster
I linked some info on you other post.
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PROJECT TRUCK: 1985 SWB C10 Silverado Black/Charcoal, 1990 V2500 Suburban, 2018 Suburban, 2005 GMC 2500HD CCSB, 2014 Toyota Camry SE, HAD.....1968 Camaro RS/SS Family owned since new; 350 3 speed  SOLD
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09-10-2010, 08:42 AM
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#6 |
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Happy to be here
 
Join Date: Mar 2000
Location: Cypress, TX
Posts: 39,021
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Re: tach cluster
Some one want to put together a nice "How to" with pics. This would be an awesome FAQ...
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Follow me on Facebook and Instagram @N2trux.com Articles- "Jake" the 84 to 74 crewcab "Elwood" the77_Remix 85 GMC Sierra "Scarlett" "Refining Sierra" |
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09-12-2010, 06:35 PM
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#7 | |
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OutOfMyMind & I'llNeverKnowWhy
Join Date: Apr 2004
Location: Another world, some other time
Posts: 672
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Re: tach cluster
Quote:
__________________
-Justin-Out of my mind and I'll never know why 1976 Chevrolet Silverado C10 350 4bbl / TH350 Big10 longbed 1986 Pontiac Firebird T-Top 5.0L TPI 700R4 WS6 1992 Pontiac Firebird T-Top 5.0L TBI 700R4 My cardomain page I don't like to save, it's more fun to spend!! |
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