1. Attachments are working again! Check out this thread for more details and to report any other bugs.

replaced 12v battery, but still having battery issues

Discussion in 'Gen 2 Prius Technical Discussion' started by thekid, Jul 5, 2017.

Tags:
  1. thekid

    thekid New Member

    Joined:
    Jul 5, 2017
    2
    1
    0
    Location:
    san diego ca
    Vehicle:
    2007 Prius
    Model:
    Four
    I was having dead battery symptoms, dead screen, car won't shut off etc, so I replaced the 12v battery and it fixed it for the mot part but they still happen occasionally.

    I've even replaced the 12v again and its still doing it. I have to go into the back and disconnect the battery and then it goes away, but its very annoying.

    Please help point me in the right direction of what to look for/at next. If its not the 12v battery causing the issues, what is next in line for things to investigate? I've tried to search all the forums and haven't found anything.

    thank you

    Ben
     
    #1 thekid, Jul 5, 2017
  2. dolj

    dolj Senior Member

    Joined:
    May 14, 2012
    7,855
    3,968
    0
    Location:
    Wellington, New Zealand
    Vehicle:
    2007 Prius
    Model:
    N/A
    Search for information about a dead or failing combination meter. Can be reworked to fix problem. One place that can help is @Texas Hybrid Batteries. Give Matt a call, I'm sure he can help.
     
    #2 dolj, Jul 6, 2017
    strawbrad, Mendel Leisk, Texas Hybrid Batteries and 1 other person like this.
  3. Texas Hybrid Batteries

    Texas Hybrid Batteries Senior Member

    Joined:
    Sep 7, 2014
    270
    552
    3
    Location:
    Dallas -Fort Worth
    Vehicle:
    2006 Prius
    Model:
    N/A
    Ben,
    dolj was right on. Your combo meter is failing, no doubt about it. Cycling the 12 volt power sometimes gets them going but it's just temporary.

    The replacement meters that we sell are $150 and come pre programmed so you just take the old one out and put the new one in. Most people do it in a couple of hours.

    PM me if you need more info.

    Matt
     
    #3 Texas Hybrid Batteries, Jul 6, 2017
    strawbrad, greasemonkey007 and M in KC like this.
  4. Mendel Leisk

    Mendel Leisk EGR Fanatic

    Joined:
    Oct 17, 2010
    56,699
    39,238
    80
    Location:
    Greater Vancouver, British Columbia, Canada
    Vehicle:
    2010 Prius
    Model:
    Touring
    Do you do any testing on the battery before replacement? At least checking the at-rest voltage, with a digital multi meter? I'd recommend checking with a digital load tester, either something DIY level like Solar BA5, or any competent battery retailer should have a pro-level tester, and will test for free, to get your business.

    And yeah, it's very well be that it's not the 12 volt that's the issue.
     
    #4 Mendel Leisk, Jul 6, 2017
    Last edited: Jul 6, 2017
  5. thekid

    thekid New Member

    Joined:
    Jul 5, 2017
    2
    1
    0
    Location:
    san diego ca
    Vehicle:
    2007 Prius
    Model:
    Four
    thank you all! it's definitely the combo meter. After learning about that and looking it up, I'm sure that is what it is.

    The really stupid thing is I'm now just outside the extended warranty for that part. Looks like I'll be taking apart the dash my prius in the near future. ;-)

    thank you all again for your help. This was driving me nuts not knowing where to look.

    Ben
     
    #5 thekid, Jul 7, 2017
    Mendel Leisk likes this.
  6. JoeX

    JoeX Junior Member

    Joined:
    Aug 26, 2015
    10
    6
    0
    Location:
    PA
    Vehicle:
    2006 Prius
    Model:
    Two
    fixed my combo meter for a few $ , replaced one capacitor extras on the shelf.
     
    #6 JoeX, Jul 17, 2021
  7. bisco

    bisco cookie crumbler

    Joined:
    May 11, 2005
    110,166
    50,060
    0
    Location:
    boston
    Vehicle:
    2012 Prius Plug-in
    Model:
    Plug-in Base
    well done!(y)
     
    #7 bisco, Jul 17, 2021
(You must log in or sign up to post here.)