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06-29-2013, 10:46 PM
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#1 |
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Chance
 
Join Date: Sep 2001
Location: Belcourt ,ND, USA
Posts: 750
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Tach question
Question. The tach in my truck quit working. When I open and shut the door the tach seems to jump a little. Sometimes when I start the truck he tach will work for a second or two then stop. Has anyone had these symptoms. The tach is a reproduction. I have not done anything to the truck execept boost the battery so I may have fried the tach but it does work momentarily sometimes for a second or two.
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1968 Chevrolet Stepside BB 396 w/TH400 1972 Chevrolet 3/4 Ton 4x4 BB 496 w/TH400 Last edited by cwilkie; 06-29-2013 at 10:48 PM. Reason: Spelling |
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06-30-2013, 12:16 PM
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#2 |
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Msgt USAF Ret
 
Join Date: Jan 2005
Location: Kalamazoo, Michigan
Posts: 8,718
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Re: Tach question
Normally the tach only has three wires to it. The power wire from the key or fuse panel. The tach signal wire from the distributor (HEI) or coil negative side (points), and the light in the tach. Make sure the tach body is grounded. The HEI connection could be loose, or the power connection might be bad. Can you try the tach on another vehicle?
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VetteVet metallic green 67 stepside 74 corvette convertible 1965 Harley sportster 1995 Harley wide glide Growing old is hell, but it beats the alternative. |
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