Dashboard outage after 12v replacement

Discussion in 'Gen 2 Prius Care, Maintenance and Troubleshooting' started by Bobcmusgrave, Jan 31, 2021.

  1. Bobcmusgrave

    Bobcmusgrave New Member

    Joined:
    Jan 31, 2021
    2
    0
    0
    Location:
    Columbus
    Vehicle:
    2005 Prius
    Model:
    N/A
    Posting for my daughter. Bought a used 2005 Prius for her a month ago. She had the 12v battery replaced and since then she has no dashboard lights (no speedometer, gas gauge, etc) it has come on a couple times since the replacement but not consistent. She's had 2 completely different diagnosis but from self admittedly non Prius mechanics. Any advice? Should she take to Toyota dealer?
     
    #1 Bobcmusgrave, Jan 31, 2021
  2. JC91006

    JC91006 Senior Member

    Joined:
    Nov 10, 2013
    16,743
    8,551
    0
    Location:
    Los Angeles, CA
    Vehicle:
    2008 Prius
    Model:
    II
    The failure is a common failure with the Prius when it ages, it's a bad combination meter. You would need to replace that unit (or fix it via some youtube video instructions). It involves soldering a new capacitor onto the combination meter.

    You can get repaired unit from texashybridbatteries.com, they offer them for $150. But you have to do the work in removing it from the car and installing the replacement unit. There are youtube videos on how to do it, but be warned, you might end up breaking some tabs that hold the AC vents together, they are very fragile on a 15 year old car.
     
    #2 JC91006, Jan 31, 2021
    Bobcmusgrave and SFO like this.
  3. Bobcmusgrave

    Bobcmusgrave New Member

    Joined:
    Jan 31, 2021
    2
    0
    0
    Location:
    Columbus
    Vehicle:
    2005 Prius
    Model:
    N/A
    Thanks for the information. I'd seen references to this on other posts. We will look into replacement.
     
    #3 Bobcmusgrave, Jan 31, 2021
  4. mr_guy_mann

    mr_guy_mann Senior Member

    Joined:
    Sep 3, 2020
    4,025
    1,950
    0
    Location:
    NJ-USA
    Vehicle:
    2006 Prius
    Model:
    Four
    +1 for a bad capacitor on the Combination Meter (speedometer assembly). It happened to my 2006 almost immediately after replacing the 12V battery.

    You can read the "stickied" thread near the top of this forum: "combination meter repair- diy" for more information.

    Since the dealer still wants crazy $$$ for a new CM, your choices are to pull it and repair it yourself (if you have decent soldering skills for surface mount components), pull it and have TexasHybridBatteries repair (or exchange it), or have a shop pull it for repair.

    Posted via the PriusChat mobile app.
     
    #4 mr_guy_mann, Jan 31, 2021
(You must log in or sign up to post here.)