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

Under the hook fuses and relays check

Discussion in 'Gen 3 Prius Technical Discussion' started by Drepdom, Feb 24, 2024.

  1. Drepdom

    Drepdom Junior Member

    Joined:
    Jan 21, 2019
    3
    0
    0
    Location:
    Texas
    Vehicle:
    2015 Prius
    Model:
    Three
    2015 Prius 3, 155k mi. My simple question is if the battery negative or power in general have to be cut off to be able to remove or replace fuses (10A PCU, 7.5 P CON MAIN)or relays (DRL fog light) from the fuse box; or shutting down the car is enough?
     
    #1 Drepdom, Feb 24, 2024
  2. StarCaller

    StarCaller Senior Member

    Joined:
    Feb 15, 2014
    1,255
    704
    0
    Location:
    Cedar Crest, NM, USA
    Vehicle:
    2014 Prius
    Model:
    Two
    Just turn the car off /
     
    #2 StarCaller, Feb 24, 2024
    bisco likes this.
  3. Drepdom

    Drepdom Junior Member

    Joined:
    Jan 21, 2019
    3
    0
    0
    Location:
    Texas
    Vehicle:
    2015 Prius
    Model:
    Three
    Then I don't understand. With the veh off , I removed a add a circuit and added back the original drl fog light relay. So, when I went to turn on the car I got the.. look at the pics.. and I haven't been able to driver my car for almost a week.
     

    Attached Files:

    #3 Drepdom, Feb 27, 2024
  4. Brian1954

    Brian1954 Senior Member

    Joined:
    Jan 31, 2021
    1,069
    393
    0
    Location:
    South Central PA, USA
    Vehicle:
    2011 Prius
    Model:
    III
    How old is your 12v battery?

    Measure the voltage of the 12v battery when the car is off.

    Do you own a 12v battery charger? Is so, connect it to the 12v battery and charge it up.
     
    #4 Brian1954, Feb 27, 2024
  5. Drepdom

    Drepdom Junior Member

    Joined:
    Jan 21, 2019
    3
    0
    0
    Location:
    Texas
    Vehicle:
    2015 Prius
    Model:
    Three
    The battery is from 1/22 and I bought it on 12/22. It charges all the way up to 13.49v. But in about .30 min it drops to 12.4v
     
    #5 Drepdom, Feb 27, 2024
  6. Brian1954

    Brian1954 Senior Member

    Joined:
    Jan 31, 2021
    1,069
    393
    0
    Location:
    South Central PA, USA
    Vehicle:
    2011 Prius
    Model:
    III
    Did you measure the battery voltage before you charged it?

    Did you try starting the car after you charged the 12v battery?
     
    #6 Brian1954, Feb 27, 2024
  7. rjparker

    rjparker Tu Humilde Sirviente

    Joined:
    Jun 6, 2008
    8,431
    5,014
    7
    Location:
    Texas Hill Country
    Vehicle:
    2012 Prius v wagon
    Model:
    Three
    Assuming the add a tap circuit was not necessary, the relay used may be wrong.

    To get better feedback add more details.
     
    #7 rjparker, Feb 28, 2024
(You must log in or sign up to post here.)