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Old 06-22-2015, 07:59 PM   #8
Lakeroadster
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Re: 70s Auto Meter Tach

Quote:
Originally Posted by OLD 9 View Post
I think I have it figured out. Black= ground Red= power and Green is coil or in my case Tach on the HEI. Right?
Sounds right to me Mark... here's a diagram from a newer tach...
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