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motornut · 10-31-2013, 09:47 AM

mine first wasn't stock in my 78,
used this to ease in/out
great for testing,and i can plug this one back in to use under the hood
hooked to the cluster power,(not threw the firewall like stock would be)
pink/black is power
black is ground at the Ebrake ground bus
and mine used a brown wire for the signal to cap(some are white)

10-31-2013, 09:47 AM	#4
motornut 78K & 79C Jimmys Join Date: Nov 2009 Location: Ottawa Ont CANADA Posts: 7,901	Re: 79 Factory Tach Help mine first wasn't stock in my 78, used this to ease in/out great for testing,and i can plug this one back in to use under the hood hooked to the cluster power,(not threw the firewall like stock would be) pink/black is power black is ground at the Ebrake ground bus and mine used a brown wire for the signal to cap(some are white) Attached Images __________________ John 1978 GMCJimmy4X4-350/203 1979 GMCJimmy4X2-305/350 Last edited by motornut; 10-31-2013 at 09:54 AM.