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06-13-2003, 02:24 PM
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#1 |
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Registered User
Join Date: Nov 2000
Location: Huntsville Ontario Canada
Posts: 4,051
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How to test a Tach ?
I have a cluster I picked up for 35 bucks and I want to see if the tach is any good thanks for the help. It is a 8cyl tach.
Thanks
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1968 Suburban numbers matching all original truck now equipped with 6.0/4L80 on Accuair http://67-72chevytrucks.com/vboard/s...d.php?t=625017 1967 C/20 6.0/4L80 Roofing Truck 1990 V2500 Suburban "Plow Truck" 2005 TAHOE DD |
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06-13-2003, 02:42 PM
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#2 |
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Registered User
 
Join Date: Oct 2002
Location: Gilroy, CA
Posts: 1,453
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Send it to me, Ill put it in my truck and let you know if it works.
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1969 Chevy Project SWB Fleet, 20s, 5.3, t56, in the weeds. 1970 Chevy Truck cab on a 1979 Jimmy frame-8.1 liter 496 bbc/sm465/np203-jeds doubler-np205/d60/14bff Welded/42 tsls on recentered H1s 1998 Chevy Crew Cab K3500 SAS'd with hpd60, links and swayaway coilovers. 8.1l vortec DD/towrig "I like long walks, especially when they are taken by people who annoy me. " |
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06-13-2003, 02:42 PM
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#3 |
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Nothing clever
Join Date: Jun 2003
Location: Kailua HI
Posts: 828
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tach
if you have a cable, attach it to a drill.
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06-13-2003, 06:15 PM
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#4 |
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Join Date: Dec 1999
Location: Eastern - Manitoba Canada, Winnipeg
Posts: 4,369
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I just take the harness and connect it to the tach head... take the red wire to the battery post and the brown wire to the coil...hmm negative side... and ground the bezel metal case to the rad cradle when I'm testing them, beats installing them.
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Senior active founding member. 70 3/4 ton GMC Suburban 4x4 250/4 spd. 71 1/2 ton Suburban Chevy 4x4, 350/350 72 Chev 1 ton tow truck 402BB w/Holmes 440 wrecker on propane 2005 FLSTSCI Harley Springer 85 FXSB Harley Lowrider 72 Triumph 650 Bonneville 5spd "Poor people don't have hobbies" Quote from wife. |
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06-13-2003, 06:58 PM
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#5 |
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Registered User
Join Date: Jul 2001
Location: santa cruz, Calif. U.S.
Posts: 166
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I just installed my tach dash and could only get 2500 rpm max. It worked prior to the rebuild of the truck. I hooked up the green to the negative side of the coil and the red or pink I think to the ignition unfused in the fuse block. There are 2 terminals one side didn't work the other works but can only get 2500 rpm out of it. Is that the wrong place for the switched ignition wire?
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Linear Mode
