It's the small MSD light that requires an rpm switch. I was hoping that using a 2 or 3 step would let me activate it at 2 different rpms without trick wiring. Problem is I got all cute and moved my tach into the dash to hide the race car look. Now I can't see my stage rpm with out taking my eyes off the tree.
. Probably just fab a bracket and get it up on the dash or cage mount it.
Dale