Power won’t go off

[Rochesterw21]

Hi all, I have a 03 super6 vy commodore recently when I have had the problem that my electrical systems won’t turn off aka, sound system, lights all of it. I turn the car off, key out, open the door and nothing goes. I’ve tried locking and deadlocking it still nothing works. I have to disconnect the battery after each drive. One guy said that it is the headunit or the sound system wiring so I changed it all everything brand new but still happens. Has anyone else had this issue or know what may be the cause?

 

[BlackVXGTS]

Faulty BCM or faulty relays?

 

[axemurderer101]

Remove the drivers door switch and give the contacts a clean.