Tail Light Assembly Circurt Board?

Discussion in 'Gen 2 Prius Technical Discussion' started by tkc100, May 5, 2025 at 1:35 PM.

  1. tkc100

    tkc100 Junior Member

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    Hello
    My right rear taillight assembly was cracked and water was leaking into it so I had decided to replace it.
    The replacement assembly that I purchased is a bit different as you can see from the attached file.
    The original had a circuit board within the bottom of the assembly.
    I have no idea what's the purpose of this circuit board is. The body harness feeds into the circuit board and from there it goes up to the brake light LED.
    The new light assembly without this circuit board seems to work just fine so I am wondering what the purpose of it is.
    It would be easy enough to splice the circuit board into the new assembly if it is necessary and has a purpose.
    Can anyone assist me with an explanation?
    Thanks
     

    Attached Files:

  2. Tombukt2

    Tombukt2 Senior Member

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    The new light is updated and it doesn't need that board that board is old days now that's been eliminated at least in the aftermarket you don't want to go taking the new head or the new tail light apart to try and reinvent the wheel they've already done it for you if you want to take apart your tail lights and save the pieces I guess so bit I would think with tail lights now in the 40 $50 range probably not necessary to save the pieces that is
     
  3. tkc100

    tkc100 Junior Member

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    Location:
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    Vehicle:
    2007 Prius
    Model:
    Two
    There were several physical variations listed as being direct replacements but if you want one that matches the other side pay close attention before ordering.
    I thought the new assembly might be an updated version but wasn't sure. In my experience the car makers never install unnecessary $items$.
    When I worked for Generous Motors we used to say they would make you a vice president if you could save a nickel on every car produced.:) Makes me wonder what that little PC board with a stack of resistors was for.
    The assembly is installed without any problems, thanks for taking the time to respond.