secondary winding 19 connected to supply a high voltage to fire the spark plug 15 primary windings 20 and 21 in the ignition coils 16 and 18 respectively are connected in parallel between a storage capacitor 22 and a negative terminal 23 the negative terminal 23 is connected through a current loop 24 to a negative or ground bus 25 which is electrically connected to the engine frame and ultimately is connected to a negative output terminal 26 from an alternator 27 or other suitable power source the remaining side of the storage capacitor 22 is connected to a junction 28 in addition to the ground bus 25 a single conductor 29 is connected between the distribution module 12 39 and the capacitive discharge module 13 39 for supplying a high voltage constant charging current to the capacitor 22 and also for supplying a trigger signal to the capacitive discharge module 13 39 the conductor 29 is connected through a resistor 30 and a diode 31 to the junction 28 for charging the storage capacitor 22 to a high voltage such as approximately 400 volts an electronic switch such as a triac 32 or an scr or other suitable switch is connected between the junction 28 and the ground bus 25 during charging of the capacitor 22 the triac 32 is in a.