Ignition Coil
The coil is "ON" whenever the ignition switch is in the "RUN" or "START" position. It contains a positive ("BAT") and a negative ("DEC") primary terminal and a single secondary terminal. A special connector attaches the green wire from the control module to the coil negative terminal and the wire from the ignition switch to the positive terminal.
NOTE:
"DEC" refers to Distributor Electronic Control. This terminal is also referred to as the "Tach Test" terminal.