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DRL stopped working

Discussion in '3rd Gen. Tacomas (2016-2023)' started by CleanWilly, Dec 22, 2017.

  1. Jul 6, 2025 at 3:16 PM
    #61
    caribe makaira

    caribe makaira Well-Known Member

    Joined:
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    Caribbean, Puerto Rico
    Vehicle:
    05 PreRunner TRD Offroad AutoTrans
    Hood Struts, My version Fogs always ON, Map & Overhead Light Mod,
  2. Jul 6, 2025 at 4:18 PM
    #62
    doyle563

    doyle563 Well-Known Member

    Joined:
    Aug 16, 2019
    Member:
    #302377
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    Jack
    Waukesha, WI
    Vehicle:
    2016 White Access Cab TRD Off Road
    Does the ground signal for the relay come from the switch on the column then? I’m confused about the role the ECU plays since you can turn them on and off through the head unit.
     
  3. Jul 6, 2025 at 5:35 PM
    #63
    caribe makaira

    caribe makaira Well-Known Member

    Joined:
    Feb 13, 2011
    Member:
    #51121
    Messages:
    11,785
    Gender:
    Male
    Caribbean, Puerto Rico
    Vehicle:
    05 PreRunner TRD Offroad AutoTrans
    Hood Struts, My version Fogs always ON, Map & Overhead Light Mod,
    No, the light stalk switch "communicates" with Main Body ECU, same as head unit. The DRL relay ties into the Main Body ECU for activation.
     

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