came to the car turned it on and notice that the car would not turn off and the ignition lock seemed loose i pull the key out and the car is still running, i removed some fuses, this shut off the car, when i put the fuses back in the car, it is automatically on, not running but on and without the key in. i changed the ignition lock with no luck, also unpluged the ignition switch which turns off the car partially (radio and other things still on) but once it is plugged again it is automatically back on. i could try to change the switch but it seems to me like maybe a hot wire is giving the signal to the car to stay in the on mode, i have a no idea how to use the multimeter to check for hot wire and not sure if that is the issue. if this is an electrical problem i wanted to at least figure out whats wrong before sending to the mechanic. any idea what could possibly be wrong?