Prius battery won't trickle charge

Discussion in 'Gen 2 Prius Care, Maintenance and Troubleshooting' started by danielac86, Mar 16, 2022.

  1. danielac86

    danielac86 Junior Member

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    Hi everybody,
    My Prius won't start at all, dashboard completely off so seems likely to be a battery issue. Tried jumping it from another car for 20 minutes or so and that didn't do the trick so I bought a trickle charger. When I connected it this morning, it said "Battery disconnected". I'm attaching a picture of how I set it up, could y'all give me your two cents on if this is the right way to connect, and if so why it might not be working? Appreciate the help.
     

    Attached Files:

    #1 danielac86, Mar 16, 2022
  2. Tombukt2

    Tombukt2 Senior Member

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    i have that exact charger get the red on solidly that port is tricky to get tight on then move ground around till it sets the light on indicating charge unf. in most I do it all at battery . from front it usually heats up wires a bit. at battey no heat unless battey really bad
     
    #2 Tombukt2, Mar 16, 2022
  3. Tombukt2

    Tombukt2 Senior Member

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    and im guessing you have no DVOM or test meter whats reading at battery if under 10 volts and nothing left on . time for new 12 V. if new return to store ..
     
    #3 Tombukt2, Mar 16, 2022
  4. Another

    Another Senior Member

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    If the battery is dead, don’t use a trickle charger. Get a real charger and fully charger it or take it to a parts store and ask them to charge it and load test it.
     
    #4 Another, Mar 17, 2022
  5. alftoy

    alftoy Senior Member

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    Try a different ground point for the black clamp, the inverter cover probably not the best ground. Maybe a body colored bolt just above the red clamp. Max charging current for Prius 12 volt battery is 4.2A The 3 amp Schumacher charger is sufficient, just may take a couple more hours to charge.
     

    Attached Files:

    #5 alftoy, Mar 17, 2022
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