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High beam / low beam swapped??

Discussion in '1st Gen. Tacomas (1995-2004)' started by AJ1001, Jan 21, 2021.

  1. Jan 21, 2021 at 11:13 AM
    #1
    AJ1001

    AJ1001 [OP] Well-Known Member

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    My headlights are weird I was wondering if anyone has had this happen to them or can help me figure out what I should do.

    So when I turn on my headlights the driver's side headlight is the normal brightness and the passenger's side headlight is on high beam. When I turn high beam the driver's side headlight is on high beam and the passenger's side headlight is the normal brightness/low beam.



    Low beam
    Low beam.jpg



    high beam
    High beam.jpg

    P.S.all attached photos we took before I resurfaced my headlights
     
  2. Jan 21, 2021 at 11:31 AM
    #2
    slodoug

    slodoug Well-Known Member

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    did you move the bulbs at all? maybe one is upside down.
     
  3. Jan 21, 2021 at 12:19 PM
    #3
    tacojim02

    tacojim02 Well-Known Member

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    you can do that? when I changed mine it looked the same no matter how you turned it
     
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  4. Jan 21, 2021 at 12:24 PM
    #4
    CraigF

    CraigF Well-Known Member

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    what electrical work have you done to your truck lately? I'd start there and see if something got swapped
    damage relay would be my second check point
     
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  5. Jan 21, 2021 at 12:48 PM
    #5
    slodoug

    slodoug Well-Known Member

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    should be 3 prongs on the back, recheck those connections and re-seat them. move the wire with your fingers in each mode to see if they revert due to any short.
     
  6. Jan 21, 2021 at 1:58 PM
    #6
    AJ1001

    AJ1001 [OP] Well-Known Member

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    I honestly don't know because I just bought this truck less than a month a ago
     
  7. Jan 21, 2021 at 1:59 PM
    #7
    AJ1001

    AJ1001 [OP] Well-Known Member

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    33" tires
    I have recheck the connections and re-seat the light bulbs and that hasn't helped
     
  8. Jan 21, 2021 at 2:00 PM
    #8
    AJ1001

    AJ1001 [OP] Well-Known Member

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    there is only one way for the bulbs to go in to be seated
     
  9. Jan 21, 2021 at 2:43 PM
    #9
    02hilux

    02hilux What do you mean there’s no road, I’m here

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    Get rid of them cheap led/hid you got there and buy halogen bulb. That's probably your issue.
     
  10. Jan 22, 2021 at 8:23 AM
    #10
    AJ1001

    AJ1001 [OP] Well-Known Member

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    Do you know of a good place I can find some or what you would recommend?
     
  11. Jan 22, 2021 at 8:32 AM
    #11
    tacojim02

    tacojim02 Well-Known Member

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    orielly's, napa, auto zone. they all have upgrade original fit bulbs
     
  12. Jan 22, 2021 at 8:39 AM
    #12
    02hilux

    02hilux What do you mean there’s no road, I’m here

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  13. Jan 22, 2021 at 9:46 AM
    #13
    AJ1001

    AJ1001 [OP] Well-Known Member

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  14. Jan 22, 2021 at 9:48 AM
    #14
    AJ1001

    AJ1001 [OP] Well-Known Member

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    The bulbs are 2 months old and are fine. I think the wiring is messed up but I don't know how to even test to see if the wiring is a problem. Does any know what each of the 3 wires that connect to the bulb does (which one controls the High beam)?
     
  15. Jan 22, 2021 at 10:22 AM
    #15
    CraigF

    CraigF Well-Known Member

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    google is your friend
    best image I could quick find [​IMG]
    you have a 1st Gen so Grd is actual +12V and the low and high are connected to ground through relays (known as Ground Switching)
    If the headlights were working correctly and now are not with no other work beening don then Relays would be my first guess
    If you can not confirm that the headlights were working correctly before the LEDs then I highly suspect that one of the LEDs is built incorrectly (other that the focal point problem they all have)
     
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  16. Jan 22, 2021 at 11:15 AM
    #16
    AJ1001

    AJ1001 [OP] Well-Known Member

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    Thank you for that, the image is not loading. Also, I don't have LED. I know very little about wiring.
     
  17. Jan 22, 2021 at 11:30 AM
    #17
    CraigF

    CraigF Well-Known Member

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    google H4 connector pinout
    sorry I thought I read that you put LED headlamp bulbs in (so many threads on that topic it blurs together)

    you need a multi-meter with continuity and or resistance mode(s)
    on the bulb the Ground pin to ether Low or High should each have continuity and a resistance value of a few hundred Ohms
    on the harness side when in Low mode there should be continuity but very little resistance (less than 5 Ohms) between the connector contact and the negative terminal on the battery and no continuity from the High contact to the neg terminal
    for high beams the invers would be the proper condition
     
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