Can I run a tach? Matt May 23, 2018 15:15 Follow Yes the green wire in the 2000i loom is a dedicated one (1) pulse per revolution tach output signal. Related articles What should I set my spark plug gaps to? Why does my Dyna S spark continuously when I am charging the battery? I want to build a custom Twincam and need to wire the ignition. How do I do it? Comments 0 comments Please sign in to leave a comment.