I'm trying to help a friend who has a 260Z with a 4 Wire Tach. We have converted the engine over to a Malorry Unilite Distributpr and Coil Setup. I understand that the black wire is the ground and another is probably the backlight illumination. When you mention "Trigger Loop" do you mean that the two remaining wires connect (1) to the positive Side of the Coil and the other (1) to the Negative? If I know the Black wire is a ground, I can just keep touching the remaining three to the posive side of the battery until I see the Backlight Light Up - that will mean that the two remaining are the Trigger Loop Wires. then within a maximum of two try's I will have the distributor working Am I on the right track?