I answered for Mike a few weeks back.Why do you have foil wrapped around your light?
Connect on the power output of the alternator. Connect the Pickup to the #1 spark plug wire.This is the only info I could find. By the way, I tested the light, it just flashes “Snap On” on the screen. Before you say anything - Yes, I did connect it correctly even though my battery is trunk mounted I used one lead to a good ground and the other to the power side of the coil.View attachment 15880