After reinstalling my motor I started it up and the gen light stayed on, I took a look and found that the ground wire on the v-reg was off so I reconnected it and the light went off, but when I turned the key to the off position the car would still run. The only thing I changed was the v-reg to one that was in better condition then mine, somebody gave it to me and it looks new. I do have an MSD installed but I dont have the diode installed. It worked fine with the old v-reg and no diode. How does power get past the ignition switch when the key is off? thanks.