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#1
07-25-2011, 11:54 AM
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Re: Sun Tach Problem
Oops, missed a page. I would bench test the tach and go from there.
Jason 
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#2
07-27-2011, 04:49 AM
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Re: Sun Tach Problem
Guys,
I hooked up one of my 8k tachs to bench test it. The tach does not work. It looks like I will send that one and my 10k back to D and M Restorations and see what they say. It's under warranty, I just do not know what caused them to fail... Thanks, Dave
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#3
07-27-2011, 05:02 AM
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Re: Sun Tach Problem
Have you checked the running voltage and the cranking voltage at the coil neg terminal? When i had the defective wiring harness that was missing the resistor wire, it put out way too much voltage when running and burned out the factory tachometer (14 volts when running). There should be 12 volts when cranking and 9 volts when running.
Make sure you're not just chasing a symptom instead of fixing the problem.
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