Erratic Tach - The 1947 - Present Chevrolet & GMC Truck Message Board Network

cleatussnow · 07-13-2003, 06:19 PM

I purchaced a tach dash for my truck and it is working intermittantly. 75 percent of the time when I am driving it does not work. However there are times when it is all over the scale... from 500 to 3500 and back. Then there are times, about 5 percent, when it works just fine...

I was thinking it was a ground. Is there a place to ground the tach? I have it hooked up now with the left wire to ign unfusd. and the other to my HEI. Is there supposed to be a ground on the nut in the center?

Any help is appreciated.

07-13-2003, 06:19 PM	#1
cleatussnow Registered User Join Date: Jun 2002 Location: Pleasanton, CA Posts: 162	Erratic Tach I purchaced a tach dash for my truck and it is working intermittantly. 75 percent of the time when I am driving it does not work. However there are times when it is all over the scale... from 500 to 3500 and back. Then there are times, about 5 percent, when it works just fine... I was thinking it was a ground. Is there a place to ground the tach? I have it hooked up now with the left wire to ign unfusd. and the other to my HEI. Is there supposed to be a ground on the nut in the center? Any help is appreciated. __________________ "What we are dealin' with here is a complete lack of respect for the law...." Beuford T. Justice



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