Is it an "after-market" radio? It sounds like it was wired to a "hot" terminal that is not controlled by the ignition switch.
The radio time would stay on if you had the keys in the ignition but the ignition was only turned halfway.
Check to make sure that your power wire on the radio is not grounding to the body of the radio. this will cause a short and thus blow the fuse.
it may not be you ignition relay, but your alternator.
If the 2003 Focus is running good then suddenly shakes and looses power, check the fuel system for proper pressure. If the pressure is correct, check the ignition system for fire, the ignition components could be starting to fail.
Well sometimes the radio is hooked up to the ignition itself. It is just the ignition wire, if it has a disconnecting face plate then you can turn it off by taking the face plate off. Or if you would like, you can pull the radio out and disconnect the wire from the ignition and it will not still be on when you cut the truck off.
AnswerSounds like a bad ignition switch.I changed the ignition switch and there was no changeCheck the neutral safety / transmission range sensor next.I know, it doesn't seem it could cause electrical gremlins, but...
It sounds like a wire short some where.
Ignition is required for an engine to work. Failure of ignition would prevent the engine working.
You may have a short in the ignition system.
the steering wheel..
The ignition switch is bad.
ignition module