Multi-Switch 84010-47490

Discussion in 'Gen 4 Prius Technical Discussion' started by PAW, Feb 18, 2026 at 9:21 AM.

  1. PAW

    PAW New Member

    Joined:
    Dec 31, 2025
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    Location:
    Herndon, Virginia, USA
    Vehicle:
    2022 Prius
    Model:
    LE
    Does anyone have the wiring for this switch?
    This version of the switch has both the HUD (Heads Up Display) and AHB (Automatic High Beams) buttons.
    The switch has 10 pins connected to a 12-pin connector.

    This is what I think I know so far:
    Pin # Wire Color (purpose)
    Pin #1 Green (?)
    Pin #2 ?
    Pin #3 ?
    Pin #4 Black (?)
    Pin #5 White/Black (ground)
    Pin #6 Red (power)
    Pin #7 ?
    Pin #8 ?
    Pin #9 ?
    Pin #10 Yellow (powers the AHB LED light)

    Appreciate any help. Thank you
     
  2. PAW

    PAW New Member

    Joined:
    Dec 31, 2025
    8
    0
    0
    Location:
    Herndon, Virginia, USA
    Vehicle:
    2022 Prius
    Model:
    LE
    The correct pin organization, facing the female plug with latch at top, should have been*:

    Pin 1 Red (likely illumination positive tied to dimmer circuit)
    Pin 2 empty** (connects to pin 6 while HUD button is pressed)
    Pin 3 empty**
    Pin 4 Black (a negative return)
    Pin 5 Yellow (positive feed for AHB LED when AHB button has been presed)
    Pin 6 White/Black (ground; negative return for pin 5)
    Pin 7 empty**
    Pin 8 empty**
    Pin 9 empty**
    Pin 10 Green

    *and also pretending holes 1 and 7 of the 12-hole female plug don't exist because the multi-switch only has 10 pins.
    **empty in my LE wiring harness.