tach wiring - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Mountain Man · 06-04-2002, 08:52 PM

Think I may have toasted my Autometer tach, but wanted to throw this question out there to see if I am missing something.

My tack is hooked up properly with green wire to HEI tach port, red to ignition on fuse box, and black to ground. I realized that I had it set for a 6 cyl. a month ago, because it was reving way higher than my engine.

I pulled it out today, and turned the screw all the way to the left, or 8 cyl. mark and put back in place.

Now when I start the truck , the needle immediately sweeps all the way to 8, 000 and stays there. I have checked ground, and all connections.

Did I turn the screw to far and break my tach, or am I missing something obvious?

06-04-2002, 08:52 PM	#1
Mountain Man Registered User Join Date: Jan 2002 Location: Calgary, Alberta, Canada Posts: 451	tach wiring Think I may have toasted my Autometer tach, but wanted to throw this question out there to see if I am missing something. My tack is hooked up properly with green wire to HEI tach port, red to ignition on fuse box, and black to ground. I realized that I had it set for a 6 cyl. a month ago, because it was reving way higher than my engine. I pulled it out today, and turned the screw all the way to the left, or 8 cyl. mark and put back in place. Now when I start the truck , the needle immediately sweeps all the way to 8, 000 and stays there. I have checked ground, and all connections. Did I turn the screw to far and break my tach, or am I missing something obvious? __________________ 72 C10 Cheyenne Super Full trim Factory tach dash A/C dash Factory tilt 350 / 350 power train - with Edelbrock components.



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