In the past days the audio of the car stoped when you turn on off the engine?

[old_tv_nut]

Before the accessory power was controlled by computer, the radio was on the accessory terminal of the ignition switch. So, as soon as you turned the switch to OFF, the radio stopped completely. Was that your question?

[Telecolor 3007]

Originally Posted by old_tv_nut

Before the accessory power was controlled by computer, the radio was on the accessory terminal of the ignition switch. So, as soon as you turned the switch to OFF, the radio stopped completely. Was that your question?

Yes, that was my question.
But if you wanted to keep it runing?

[old_tv_nut]

Originally Posted by Telecolor 3007

Yes, that was my question.
But if you wanted to keep it runing?

Then you would not turn the switch all the way to OFF. The positions on the switch were OFF, ACCessory, RUN, START. A spring would return the key from START to RUN when you released the key.

On even earlier cars (like 1930s to early 1950s, I guess - before my time) the starter motor was activated with a foot switch.