Anyone know why my high beams work but my low beams dont?

Discussion in 'Prius v Care, Maintenance and Troubleshooting' started by RayLepson, Feb 24, 2025 at 9:12 PM.

  1. RayLepson

    RayLepson New Member

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    Both low beams won't come on. I checked the fuse for the low beams, but the fuse looks ok. Not sure where to go from here. Any help would be appreciated. Thanks.
     
    #1 RayLepson, Feb 24, 2025 at 9:12 PM
  2. rjparker

    rjparker Tu Humilde Sirviente

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    odds are good both low beams are burned out.
     
    #2 rjparker, Feb 26, 2025 at 9:50 AM
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  3. ChapmanF

    ChapmanF Senior Member

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    Where did you find a fuse for the low beams? I think of v and gen 3 liftback being similar, and gen 3 doesn't have one, but maybe v does.

    Gen 3 liftback has a long white 'integration relay' that powers both low beams and a bunch of other things, and one 40 amp fuse on the supply to that. If that one fuse went open, a bunch of things would stop working.
     
    #3 ChapmanF, Feb 26, 2025 at 12:06 PM
  4. rjparker

    rjparker Tu Humilde Sirviente

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    Chapman is right, the low beams are just a 40 amp as shown below
    IMG_7649.jpeg
    Each low beam has a separate ground so grounding problems are unlikely.


    The high beams have their own fuses but in your case they are good.
    IMG_7650.jpeg

    What does happen is one low beam bulb burns out (H11 type) but it goes unnoticed until the other fails.
     
    #4 rjparker, Feb 26, 2025 at 12:43 PM
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  5. RayLepson

    RayLepson New Member

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    Because both were out, I didn't consider that a possibility. I'll get a couple new bulbs and try it. Thanks!
     
    #5 RayLepson, Feb 27, 2025 at 6:54 PM
  6. RayLepson

    RayLepson New Member

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    RJParker, I'll go with the new bulbs and see how that goes.

    The fuse for the low beams is, I believe fuse 20. It is clustered with two other fuses. All were in good condition.

    Thanks to everyone who replied. I appreciate it!
     
    #6 RayLepson, Feb 27, 2025 at 7:02 PM
  7. MAX2

    MAX2 Active Member

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    It remains to be seen whether the car has a DRL module or not. If the module is faulty, then voltage will not reach the lamps.
     
    #7 MAX2, Feb 28, 2025 at 3:57 AM
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