Dead after sitting for a week

Discussion in 'Gen 3 Prius Main Forum' started by GasSavings, Jul 4, 2025 at 9:39 PM.

  1. GasSavings

    GasSavings New Member

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    Hey guys, I parked my Prius at a neighbor’s place and left it for about a week. The lights were set to Auto, but when I came back to move the car, it was totally dead,

    I brought a booster pack pumped the fuse cover, and a little red latch and clamped the positive one there and the negative onto various different places on the chassis to ground.

    got in the car. It’s still totally dead,

    I tried touching the positive and negative of the booster, packed together quickly and a major sparks, so it is working


    Anything else I could check for?

    thanks in advance really appreciate it,!

    by the way, I have a replacement battery brand new that my son bought and never installed, but I still figured I should be able to get it boosted and working with a rep replacing that should I not?

    and when I drove it there, it started up and worked perfectly but I’m wondering if leaving the lights on Auto there was a little bit of drain or something else draining?
     
  2. bisco

    bisco cookie crumbler

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    are you sure the jump pack was connected to a good ground?
    the red covered jump point is only metal on one side, make sure the jump pack clip is clamped on properly.
    charge the jump pack and try again, a spark doesn't mean much.
    put the jump pack back on and open the hatch.
    try jumping the battery directly.
    if that doesn't work, remove the cables from the battery and connect the jump pack to the cables. i hope you didn't damage the jump pack. charge the replacement battery before installing it
     
    #2 bisco, Jul 4, 2025 at 9:55 PM
    Last edited: Jul 4, 2025 at 10:01 PM
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  3. JC91006

    JC91006 Senior Member

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    I suspect the ground you used was not good. Try again but this time turn the headlights on. When you have a good connection, you'll see the bright headlights and you'll know your connection is good.
     
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