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I'm about to install the tach board and saw the Wilcox video so my question is, where are most of you that have done this repair getting your 12V supply from to do the zero reset?
If it from a 12V adaptor, the auto battery or are you using the alternator supply?
We use a power supply but any 12 volt option you have will work. If you use the alternator you can also run a spare wire to the signal terminal and make sure the board is working properly before you do the re-install. (just run a wire from A to B as shown below) Doing a re-install on your car is no easy task so it's best to test first.
Willcox
Last edited by Willcox Corvette; Apr 21, 2016 at 08:43 AM.