Why my aftermarket radio dont shut off when car shuts off

Hello, there is a circuit that deals with power when the ignition is in the "on" position and the door has not been opened even when in the "off" position. This may not have been properly wired when installing the aftermarket radio. Because this has been modified, it's really hard to know. Testing must be done preferably by whoever installed the radio.

As stated - with key off, retained accessory power module is activated - until predetermined time has elapsed or door is opened - that’s normal operation - - it was the same with factory audio system. Now if the audio system stays on with key off and door open - strongly suspect improper installation.