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05-23-2003, 01:19 AM
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#1 |
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Pronounced "Pew-al-up"
Join Date: Oct 2002
Location: Puyallup, Washington
Posts: 845
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Tach wiring
I recently purchased an aftermarket tach on ebay and have some wiring questions. The Tach I bought did not come with any wiring, and I am wondering if I need shielded cable or what to wire it up?
I am installing a HEI soon, but want to wire it to my stock distributor. Do I just run a wire to power and one to the distributor?? Any help would be great!!! 
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Classic GM Trucks of Washington Club Member 1970 FS chevy,350/350, Edelbrock cam and intake. Holley 650 carb,HEI,AT,Tangier Orange, 18's, Power Locks, Truck Photos |
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05-23-2003, 01:27 AM
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#2 |
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Hot Damn - Here I Am!!
Join Date: Feb 2000
Location: Ringgold, Georgia
Posts: 726
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It's been a while since I hooked a tach up without it already having a HEI installed but if memory serves me correctly, the positive side of the tach is for a 12v and the negitive side of the tach hooks to the negitive side of the coil. Let someone else here verify this though first - if you hook it up wrong you'll FRY your new tach.
  Robert
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My vehicles: '90 Silverado Sport '71 Chevelle SS Convertible '70 C-10 - My Grandfather bought it new - original un-restored |
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05-23-2003, 01:33 AM
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#3 |
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its all about the +6 inches
Join Date: Jan 2001
Location: Hilliard Ohio
Posts: 2,693
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There should be 4 wires...red, black, white and green.
The green goes to the negitive side of your coil...or the TACH terminal on the HEI. The red is ignition power. the white is dash light power. the black is ground. |
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05-23-2003, 03:33 AM
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#4 |
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Registered User
Join Date: Jul 2001
Location: North Delta, British Columbia
Posts: 1,344
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For the white wire, where do you hook that one to? I know it goes to a light source but how and where would you phsyically put it?
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1992 Gmc 2wd 1972 Chevy Blazer 2wd |
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05-23-2003, 09:14 AM
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#5 |
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Registered User
Join Date: Jan 2003
Location: Washington State
Posts: 8,834
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For the white wire, should be dash panel lights. Either check your fuse box for a positive with the light switch is on. Or to one of the two grey wires at the connector to the dash (according to the wiring on GMC Pauls site)
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1970 Chev CST 2003 Harley Fatboy 1975 Chevrolet Step Van 1956 Chev Bel Air 1977 Blazer 2WD For Sale $3000.00 1978 Blazer 2WD For Sale $7000.00 1978 Silverado 2005 Monte Carlo |
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