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Factory Tach Failure?

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03-17-2015, 01:11 PM	#1
Keyblazer Registered User Join Date: Feb 2015 Location: Irvine, CA Posts: 36	Factory Tach Failure? Working on my '73 Blazer, and working thru its issues. The Factory Tach, is not working and is stuck on 1500 rpm. It jumps when I turn on the ignition, but nothing. Wondered if this is a standard failure mode of these or I have a wiring issue, as I have other instrument that are not working? Pic.

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