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Brake lights not working when headlights on

Discussion in '1st Gen 4Runners (1984-1989)' started by Bil, Jun 7, 2019.

  1. Jun 7, 2019 at 7:14 AM
    #1
    Bil

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    Bil [OP] New Member

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    Both tailights work when headlights are on but my brake lights don’t...fuses seem fine...any ideas...going to check bulbs but suspicious that both don’t work
     
    Bil, Jun 7, 2019
    #1
  2. Jun 7, 2019 at 2:41 PM
    #2
    4scooter19

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    4scooter19 New Member

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    Do your brake lights work with your headlights off?
     
    4scooter19, Jun 7, 2019
    #2
  3. Jun 7, 2019 at 2:57 PM
    #3
    Dillusion

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    Dillusion New Member

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    I'm guessing a 88 4R has dual filament bulbs. So the brake light is not the same as just the headlights though it is coming from the same bulb.

    I say check fuse first not sure if its on the same fuse or not.
     
    Dillusion, Jun 7, 2019
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  4. Jun 7, 2019 at 3:20 PM
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    4scooter19

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    4scooter19 New Member

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    You are correct they do have dual filaments. The fact that he said with the headlights on they don't work makes it seem like they work with the headlights off. Which wouldn't be a filament issue. Could be a brake light switch as well of they don't work at all.
     
    4scooter19, Jun 7, 2019
    #4
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