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03-29-2019, 01:42 PM
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#1 |
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Senior Member
 
Join Date: Sep 2007
Location: Albuquerque NM
Posts: 7,858
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testing a tach
when testing factory tach, do I need to ground it at the tin or behind the guage itself or can I just run a live to the battery and the coil to the HEI?
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1967custom |
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03-29-2019, 03:25 PM
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#2 |
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Registered User
Join Date: Oct 2011
Location: Victoria, B.C
Posts: 3,794
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Re: testing a tach
When I test a tach I (temporarily) wire it this way:
1) Grounded alligator clamp to the tin or tach casing (same thing). (use a good alligator clip or equivalent) 2) (-) terminal/spade & wire to the coil (-) connection 3) (+) terminal/spade & wire to the battery (+) ...either way, you will have to ground that tach housing or you won't get any action on the tach. After that, I fire the engine and check the tach and ideally use a different separate tach to check the accuracy....which often isn't all that great compared to a digital tach. All good Coley
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....for some men, there is experience, skill and effort....for the others...there is visa and UPS LOL 1966 Chevy 1/2 ton (Florida- Red/white) 1972 Chevy 1/2 ton (California- Blue/white) 2005 Chevy Silverado HD2500/Duramax 2000 Dodge Ram 1500 |
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04-05-2019, 12:16 PM
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#3 |
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Senior Member
Join Date: Sep 2007
Location: Albuquerque NM
Posts: 7,858
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Re: testing a tach
great man thank you very much!!
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