Installed aftermarket radio. Now panel lights are stuck in "day" mode.

Discussion in 'Gen 2 Prius Main Forum' started by QuillBin, Oct 5, 2015.

Tags:
  1. QuillBin

    QuillBin Junior Member

    Joined:
    Jan 3, 2015
    9
    0
    0
    Location:
    West Chester, PA
    Vehicle:
    2005 Prius
    Model:
    Three
    I think I ran over a bump and something shorted out. Now the panel lights on the MFD Flicker on and off as if I was turning the headlights on and off ( the headlights remain on however) My cheap solution is just leave the dimmer switch in the all the way to the top position. MFD works. Everything else works. It's just the lights are weird on the MFD. Did the MFD cat fried or did something else get fried? Either way it should just be a salvage parts swap should I need to replace anything?
     
    #1 QuillBin, Oct 5, 2015
  2. bisco

    bisco cookie crumbler

    Joined:
    May 11, 2005
    111,562
    50,803
    0
    Location:
    boston
    Vehicle:
    2012 Prius Plug-in
    Model:
    Plug-in Base
    could just be the dimmer switch.
     
    #2 bisco, Oct 5, 2015
    QuillBin likes this.
  3. frodoz737

    frodoz737 Top Wrench

    Joined:
    Aug 26, 2010
    4,463
    2,412
    33
    Location:
    Texas
    Vehicle:
    2015 Prius
    Model:
    Four
    Aftermarket on the Gen III had the option to splice into the dimmer wire for the head unit. If yours was similar, check your splice.
     
    #3 frodoz737, Oct 5, 2015
  4. QuillBin

    QuillBin Junior Member

    Joined:
    Jan 3, 2015
    9
    0
    0
    Location:
    West Chester, PA
    Vehicle:
    2005 Prius
    Model:
    Three
    Where could I purchase a dimmer switch? And I am shocked that this incredibly complicated car electronics wise has such an evidently simple control system for the button lights on the mfd.
     
    #4 QuillBin, Oct 5, 2015
    Last edited: Oct 5, 2015
  5. QuillBin

    QuillBin Junior Member

    Joined:
    Jan 3, 2015
    9
    0
    0
    Location:
    West Chester, PA
    Vehicle:
    2005 Prius
    Model:
    Three
    Replaced the dimmer switch. No change. What else controls the dimmer circuit?
     
    #5 QuillBin, Oct 13, 2015
  6. bisco

    bisco cookie crumbler

    Joined:
    May 11, 2005
    111,562
    50,803
    0
    Location:
    boston
    Vehicle:
    2012 Prius Plug-in
    Model:
    Plug-in Base
    bummer. if no one knows, i guess you'll have to go to toyota tech info and look at the schematic.
     
    #6 bisco, Oct 13, 2015
  7. jdenenberg

    jdenenberg EE Professor

    Joined:
    Nov 21, 2005
    3,910
    1,908
    1
    Location:
    Trumbull, CT
    Vehicle:
    2020 Prius
    Model:
    LE AWD-e
    Send me a PM and I will send you a link to the maintenance manual on my web server for your Prius. One of the PDFs contains the wiring diagram (very complex).

    JeffD
     
    #7 jdenenberg, Oct 13, 2015
    bisco likes this.
(You must log in or sign up to post here.)