New head unit question

[BigPip]

I installed a new head unit and I couldn't be happier about it but now when i turn my car off, the radio shuts off, before with the factory stereo it would stay on until I open my door. Does anyone know how I can get that back? I figured I would have to find the wire behind the radio and hook that up as my switched power but not sure if thats right of what wire that is.

 

[jrdnhsnbrg]

Bump. I have the same deal.

 

[MooJohn]

Can't do it. We don't get "true" retained power like some other cars where the switched 12v is kept live until a door is opened. Instead the stock radio stayed on as long as it was told to by the communications bus (CAN bus). Only the OEM radio has this ability.

 

[jrdnhsnbrg]

Would it work to run an additional +12V line straight from the battery with a switch so I could just flip the switch on before I killed the ignition and keep the radio on? I can't think of any reason why that wouldn't work. Gotta put a switch on my remote wire for my sub anyway, it's too loud for just everyday listening.

 

[BigPip]

I think I have figured it out- I bet if we find the wire in the harness and put a one way diode and connect it to the radio switch power we will be in business. We would probably need to put a one way diode on the car factory trigger 12v. That will work. I will check it out sometime to confirm.