1982 Toyota Corolla The Car will stsrt than stop.

Hi again, The car will start with the wire from the battery to the coil and I changed the ballast to a new one but the problem still exists( the car will start but as soon as you let the key go it turns off.)I have replaced the ignition switch and cables, and the car stills stops once you let the key go, It does run with the wire to the positive side of the coil. It has done. 119000 KM It is a Corolla CS.