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

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

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  1. QuillBin

    QuillBin Junior Member

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    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

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    could just be the dimmer switch.
     
    #2 bisco, Oct 5, 2015
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  3. frodoz737

    frodoz737 Top Wrench

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    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

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    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

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    Replaced the dimmer switch. No change. What else controls the dimmer circuit?
     
    #5 QuillBin, Oct 13, 2015
  6. bisco

    bisco cookie crumbler

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    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

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    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
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