ok so you have a problem with the ignition output signal circuit. step1: disconnect the 2P connector on the distributor, its the plug with only 2 wires. turn the ignition to the ON position. Measure voltage, take your black DMM lead and take it to a known good ground, take your red lead and take it to the BLACK/YELLOW wire on that 2P connector. IS THERE BATTERY VOLTAGE?
if NO: repair open in BLACK/YELLOW wire between the 2P connector and ignition switch
if YES: POST YOUR RESULTS SO WE CAN THEN MOVE ON TO CHECKING YOUR Ignition Control Module