Has anyone considered trying to get the radio to stay on after you turn the car off?

Discussion in 'Gen 3 Prius Audio and Electronics' started by BrettS, Mar 9, 2011.

  1. BrettS

    BrettS Active Member

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    The last two cars I had (a Ford and a Chevy) both kept the radio on after the car was shut off until the driver's door was opened. It sounds like kind of a silly feature and I kind of laughed at it when I first saw it, but now that I don't have it on my Prius I find that I rather miss it.

    When I park the first thing I usually do is shut off the car, then I put my sunglasses away and gather up anything I need to take out of the car with me and even though it only takes a little while it would be nice if the radio stayed on during this process... that way you can listen to the end of a song or hear the end of a segment or whatever... and if you're really into whatever's on even after you're ready to get out you just leave your door shut until it's over.

    As I've been thinking about this it seems like it would be reasonably easy to fix... Find a constantly on 12V source and use a latching relay to connect that to the radio's power input... then trip the relay when the driver's door is opened.

    Alternately, I seem to recall that after the car is shut off you can still operate the power windows until the door is opened, so maybe I could just use that source to power the radio (through a relay if it would draw too much power). I haven't tested this yet and I'm not sure how long the window power stays on... I think the other cars I had will shut off the radio after 5 or 10 minutes to save the battery, so if it's much less than that it would probably be too short to be useful.

    Before I get too far in this project I was just wondering if anyone else had tried anything similar... or if maybe I'm just crazy;)

    Thanks,
    Brett
     
  2. bisco

    bisco cookie crumbler

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    i havn't tried it, but i like it!
     
  3. stream

    stream Senior Member

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    With the Prius there's no need to do anything to achieve the same result. When you get to your destination, put the car in park. The gas engine will turn off almost immediately (just like it does at a traffic light), unless the hybrid battery is too low (in which case it will stay on until the batter has sufficient charge). Do what you want, then turn the car off before getting out.
     
  4. BrettS

    BrettS Active Member

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    Yeah, I had considered that, but that requires retraining myself and I'm too old to learn new tricks;) Besides, I still drive my wife's car occasionally and then I'd just wind up letting it idle longer if I get in the habbit of waiting to shut it off.
     
  5. 32kcolors

    32kcolors Senior Member

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    Old dogs can learn new tricks. Just put it in park when you get to your destination.
     
  6. JimboPalmer

    JimboPalmer Tsar of all the Rushers

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    I would not put any load on the 12 v battery myself. Leaving the car on until the song ends is much safer.
     
  7. xs650

    xs650 Senior Member

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    I didn't apply for a job to serve my car, I bought my car to serve me.:rockon:
     
  8. cproaudio

    cproaudio Speedlock Overrider

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    Retained accessory feature is easy to do with 3 relays and a couple of diodes. Special Applications with SPDT Relays, Diagrams

    Alternatively, there is a way to activate Prius's retained accessory (2seconds) so that the acc does not immediately shut off after powering off. It give you enough time to turn the acc back on before the radio shuts off. I've done it before but now I can't figure out how.
     
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