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**michael bustamante** · 03-29-2019, 01:42 PM

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?

03-29-2019, 01:42 PM	#1
michael bustamante Senior Member Join Date: Sep 2007 Location: Albuquerque NM Posts: 7,818	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? __________________ 1967custom