which terminal on the coil, 1 or 15?

15 should be very close to what the battery has when cranking-ie 11v at battery, 10.5 or higher at 15.

1 i've never tried to measure actual voltage as it is a trigger from the ezl prompted by the crank sensor. i've only used a scope on the crank signal at the ecu and never a reason to check coil 1. good luck, chuck.