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Keeping the main battery powered while changing the 12 volt? Need help

Discussion in 'Gen 3 Prius Main Forum' started by J burnstick, Apr 15, 2019.

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  1. J burnstick

    J burnstick Junior Member

    Joined:
    Sep 5, 2017
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    Location:
    Florida
    Vehicle:
    2010 Prius
    Model:
    Five
    So my 12 volt battery is on its last limb. Got a brand new 12 volt from Toyota OEM. However, in my owner's manual it doesn't say anything about keeping power on the main battery while you change the auxiliary battery. However I've heard from people through word-of-mouth that you have to keep the hybrid battery powered with jumper cables to another car or you will lose radio presets. I haven't seen this in the owner's manual...
     
    #1 J burnstick, Apr 15, 2019
  2. bisco

    bisco cookie crumbler

    Joined:
    May 11, 2005
    110,164
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    Location:
    boston
    Vehicle:
    2012 Prius Plug-in
    Model:
    Plug-in Base
    incorrect.
    the 12v holds the radio presets, window setting etc. it's not that big a deal, but if you want to retain everything, put a jump pack, or another car 12v jump to the front jump point under the hood.
     
    #2 bisco, Apr 15, 2019
    Uberdriver2710 likes this.
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