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**The Rocknrod** · 05-30-2020, 10:54 AM

I would think the Tach trigger is what sends the tachometer the pulses that make it read how many RPM there is.
Dont confuse that with a Crank Trigger.

05-30-2020, 10:54 AM	#7
The Rocknrod Moderator Join Date: Aug 2011 Location: China Spring, TX Posts: 7,280	Re: Factory Tach and MSD AL6 connection I would think the Tach trigger is what sends the tachometer the pulses that make it read how many RPM there is. Dont confuse that with a Crank Trigger. __________________ Master Chief, US Navy, Retired 1964 C10 Step-side Short Bed - In Progress 2009 2500HD Duramax LTZ 1948 GMC Panel 1956 Big Window Stepside 1953 5 Window Chevy Stepside 1932 Coupe New Seat Foam for Bench Seats?