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03-29-2010, 12:43 PM
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#1 |
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3/4 Ton Rodder
Join Date: Jan 2009
Location: Manlius, IL
Posts: 1,146
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Tach Wiring Help.
Hey guys, I was going through a box in the garage and I found a tach that I want to hook up in my truck to keep an eye on things. I know where the two wires for the light go to, one blue wire(-) and one yellow wire(+), but the wires for the tach itself have me confused. The two wires for the tach are one green wire and one black wire. I'm pretty sure that the green wire goes to my tach output on the distributor, but where does the black wire go to? Any help is appreciated.
Thanks Benjamin.
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1981 Chevy Scottsdale C20 "Orange Crush": SOLD 1989 Chevy Silverado K2500: All Stock (For Now), 350 TBI/700R4. DD/Light Duty Toy. |
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03-29-2010, 01:44 PM
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#2 |
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Registered User
 
Join Date: Dec 2008
Location: Providence Rhode Island
Posts: 404
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Re: Tach Wiring Help.
i think the black is just a ground
if i recall correctly my tach had 4 wires red white green and black red was to the fuse box for ignition power black was ground white was illumination which i put into the illumination slot in the fuse box green was signal |
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03-29-2010, 02:59 PM
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#3 |
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3/4 Ton Rodder
Join Date: Jan 2009
Location: Manlius, IL
Posts: 1,146
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Re: Tach Wiring Help.
If it helps any, the brand of tach is Hawk.
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1981 Chevy Scottsdale C20 "Orange Crush": SOLD 1989 Chevy Silverado K2500: All Stock (For Now), 350 TBI/700R4. DD/Light Duty Toy. |
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03-29-2010, 05:42 PM
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#4 |
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Registered User
Join Date: Jan 2010
Location: Loveland, CO
Posts: 1,921
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Re: Tach Wiring Help.
Green should go to the distributor, and on every tach i've ever seen the black is ground.
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Zach 1970 Chevrolet Custom Camper K20 1971 GMC Super K2500, 12V/NV4500 swap in progress 1971 Chevrolet Custom C10 1972 Chevrolet Custom Deluxe C20, 5.3/4L60E 1972 Oldsmobile Cutlass Supreme, 455/TH400, 3.73 posi 2004 GMC Sierra 2500HD, LB7/Allison, CCSB 2005 GMC Sierra 1500, 5.3/4L60E, CCSB |
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03-29-2010, 06:11 PM
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#5 | |
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Chevys Kick A$$
Join Date: Jan 2005
Location: Zootown, MT
Posts: 12,699
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Re: Tach Wiring Help.
Quote:
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*HOODS is what I answer too* -'79, '77, '88 Pickup Sold, '85 Camaro, '83 T/A, '81,'83,'90 K5 Blazer All Sold  -'79 3/4 ton "Big Yellow Bananna" Lifted 4spd. 39.5 TSL Swampers, The money Pit  -'86 K5 Blazer Silverado 6.2 4" lift 35"s -'95 Ext. Cab Shorty 4" Tuff Country rolling 35" M/T's -'83 Monte Carlo T-Tops. 126,500 Original Miles -LATER  I would rather push a Chevy then drive a ford!!
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03-29-2010, 06:21 PM
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#6 |
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Registered User
Join Date: Dec 2008
Location: Providence Rhode Island
Posts: 404
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Re: Tach Wiring Help.
if you tap the white into the fuse box where it says illum... like you said it turns on with all the interior lights and you can dim it also
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03-29-2010, 06:56 PM
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#7 |
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Watchin the rust grow
Join Date: Oct 2008
Location: Western Nebraska
Posts: 950
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Re: Tach Wiring Help.
Green goes to dist.
Black is ground I'd put it with headlights, like stated, so it lights up at night but stays sun-lighten at day.
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1979 Chevy K10 (H/D Front end) - 350 w/ Holley Truck Avenger, Weinald Intake manifold, headers, bored .060 over, mild cam, Built up TH350 (TranStar Shift kit) with a part-timed NP203 t-case SOLD ($3,000) 1997 Chevy Silverado 1500 - 4.3 vortec, extended cab, 21 highway MPG, stock. "Red" SOLD ($3,000) 1987 Toyota 4wd Pick-up - work in progress, future DD SOLD ($1,850) 1998 Dodge Ram 2500 Cummins 5spd Quad cab - old 12 valve with some work done  2004 Chevy Silverado - Black, 4x4, 5.3L, stock for now Underneath that rust is a heart of gold
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03-29-2010, 09:11 PM
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#8 |
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3/4 Ton Rodder
Join Date: Jan 2009
Location: Manlius, IL
Posts: 1,146
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Re: Tach Wiring Help.
Well guys, I wired it up and it worked fine at first, but after about two minutes it started saying that my truck was idling at 4,500 rpm. on the V8 setting. That's not right, so I think the reason I ended up with the tach is that it is burnt up. I need to find a different one I guess.
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1981 Chevy Scottsdale C20 "Orange Crush": SOLD 1989 Chevy Silverado K2500: All Stock (For Now), 350 TBI/700R4. DD/Light Duty Toy. |
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