Car needs fixing

[xoxoxoBruce]

Originally Posted by tw

Radio does not know whether power was disconnected at its connector. Or disconnected at the battery.

Theft proof radios do, even with the radio off and the key off, the radio is still connected to the computer and seeing power, that's how it holds it's presets. When the radio loses power the computer will lock it up. When power is restored the computer knows the codes to enable the radio again. Some high-end radios lock up every time the ignition is locked, relying on the computer to unlock it.