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06-11-2008, 05:00 PM
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#1 |
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Registered User
Join Date: Apr 2004
Location: Calgary, Alberta,Canada
Posts: 1,595
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Does a factory Tach dash require a ground wire??
I have a confirmed 12v at the back of the tach on the 12V side and have the "tach" wire hooked up to the HEI............but no tach movement.
Is there another lug that needs a ground wire??? 
__________________
I know what your thinking.......I have ESPN.  Sometimes it's easier to do things the hard way.  Fesler Built 1968 Chevy C10....Must resist the urge to mess with it!! 
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06-11-2008, 06:45 PM
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#2 | |||
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Union Electrician
Join Date: Feb 2005
Location: Louisville, Ky.
Posts: 3,356
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Re: Does a factory Tach dash require a ground wire??
The cluster itself should have a ground lead from the back metal case to the truck. My truck doesn't have this ground and I have never had any trouble with tachs not working at all( believe me I have tested several hundred of these dashes). Most likely you have a bad tach or a bad connection in your tach wiring harness somewhere.
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 69 Custom-10 SWB FLEETSIDE  350/350 TH Dropped 3.5/5.5"Help support the board->HERE Board vendors -> Vendors list Zip:40272 Big Sandy Survivor... Quote:
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06-19-2008, 01:47 PM
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#3 | |
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Senior Member
 
Join Date: Jun 2002
Location: Murray, Kentucky
Posts: 3,465
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Re: Does a factory Tach dash require a ground wire??
Quote:
I have a cluster I need to test... Thanks, Rg
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Roger '68 Short step - https://67-72chevytrucks.com/vboard/...d.php?t=849675 '69 ('70?) 2wd Blazer '70 GMC Jimmy 2wd '73 Firebird - https://67-72chevytrucks.com/vboard/...d.php?t=853203 |
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